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Linear Systems
An easy and economical way to put your ideas in motion




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Q: What is the most straightforward and effective way to design a
   machine or mechanism that requires precise linear positioning?




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Leadscrews and nuts
For over 30 years Haydon Kerk has been
manufacturing linear systems using leadscrew and nut
systems based on a polymer nut and a stainless steel
leadscrew




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What are the key characteristics of the
leadscrew?

Diameter, also referred to as the OD or major
diameter. The diameter is typically chosen to
meet the load requirements in the system.

Lead, this is the distance that nut would advance
if you rotated the screw 360 degrees, this is
commonly confused with the pitch.
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Lead – The axial distance a screw thread advances in a single revolution

Pitch – The axial distance measured between adjacent thread forms




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Leadscrew
The leadscrew provides a linear force using the simple mechanical principle of
   the inclined plane. Imagine a steel shaft with a ramp (inclined plane)
   wrapped around it. The mechanical advantage (force amplification) is
   determined by the angle of the ramp which is a function of the lead, pitch,
   and diameter of the screw.




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• All of the screws are
  rolled (a cold forming
  process) from 303
  stainless steel bars.
• Other materials have
  been rolled such as
  cold rolled steel,
  aluminum and
  titanium.
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• The rolling process offers a lot of benefits
  over ground or machined threads, these
  benefits include:
  – Increase lead accuracy, especially on longer
    lengths
  – Highly polished screw surface for low friction
    and long life
  – Economical to produce
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• When a leadscrew and nut are used to generate linear
  motion there are some clearances between the two parts
  to allow them to fit together without interference. These
  clearances are essential to the system but can lead to
  backlash or “lost motion” when reversing the direction of
  load.




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• When positional accuracy is
  not critical a freewheeling nut
  is a good solution.
• Haydon Kerk offers
  freewheeling (BFW) style
  nuts for all of our leadscrews



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What can be done to eliminate this ‘lost
motion’?
– If the system is mounted vertically gravity will
  bias the nut to one side
   • Caution: High acceleration or certain speeds can
     cause vibration, noise or momentary loss of
     positioning
– A biasing load such as a spring can be added
  to the system
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• A standard method for taking up backlash is to
  bias two nut halves axially using a precision
  shim or some form of compliant spring.




  These mechanisms all increase drag torque in the system, but
    many styles of nuts have been developed for all kinds of
                         applications.                    Sold & Serviced By:


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•   Two nut halves can be biased apart by a
    solid spacer but in order to keep the
    backlash to a minimum the system
    would need to be continuously adjusted.
•   Instead of a solid shim an elastomeric
    ring is used to provide some compliance
    in the NTG series nut.
•   This series allows the drag torque and
    stiffness to be specified and or set by
    the end user.
•   The elastomeric ring provides a small
    amount of wear compensation.


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•   This simple compression type spring between two nut halves is a
    simple solution but does have some drawbacks:
     – The nut is very stiff in only one direction, the opposite direction is
        only as stiff as the spring
     – To move a 10 pound load you would need to have at least a 10
        pound preload on the spring system this leads to high drag
        torques and high wear rates
•   For lightly loaded applications or vertical applications where some
    dampening is required Haydon Kerk offers the CMP (Compression)
    Style anti backlash nut.




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• For increased stiffness with a reduction in drag torque
  the Wedge series (WDG) nut is a good choice.
• Through the use of a collapsible wedge the spring force
  is multiplied by about 5 to 1 to increase the stiffness.
• The nut can be ‘back driven’ meaning it will not bind up
  on unevenly worn screws.




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• Another method of biasing the
  two nut halves is to use another
  threaded member in
  conjunction with a torsion spring
  to ‘push’ on one nut half.
• Haydon Kerk’s KHD and VHD
  series nut’s use this technology.
• These designs are optimized for
  higher load type applications
  where axial stiffness and low
  drag torque are required.
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• In instances where there
  is a light load, vibration or
  noise present the ZBX
  series of nuts is a good
  economical solution.
• The nut uses a collet
  style mechanism to
  collapse radially onto the
  screw threads and
  remove both axial and
  radial clearances in the
  nut.
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• The ZBX nut is for lightly loaded
  applications, in cases where a
  higher load is required the ZBA
  style replaces the spring
  mechanism with a threaded solid
  collar that biases the collet
  fingers radially inward.
• This threaded collar allows
  adjustment of the preload on the
  nut (drag torque).


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• The most flexible design
  is the NTB nut which
  offers excellent axial
  stiffness, low drag torque
  and is easily customized.
• The NTB nut is available
  across the entire range of
  leadscrew sizes.
• Caution needs to be
  exercised when using this
  nut with very fine leads,
  Kerkote TFE coating is
  recommended.                 Sold & Serviced By:


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• For small or compact
  applications a ‘mini’
  series of nuts is available
  in the BFW, NTG and
  NTB series.
• Coming this summer is a
  ‘micro’ series based on a
  line of 2mm diameter
  leadscrews.


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Custom Nut Materials
• Haydon Kerk’s most common nut material is a
  poly acetal that is fortified with Teflon for
  lubricity.
• Haydon Kerk offers more than a dozen custom
  materials (Poly acetal, Nylon, PPS etc.) both
  with and without carbon fiber reinforcement.
• The carbon fiber reinforcement is critical in
  applications that require a wide operating
  temperature range or a high load capacity.
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Leadscrew Coatings
• While many of the different nuts series
  work well without any additional lubrication
  there are several reasons to use a
  lubricant (either a solid film type lubricant
  or a grease) these reasons are:
  – Increased life
  – Reduced drag
  – Improved efficiency
  – Dampens noise and vibration        Sold & Serviced By:


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• Haydon Kerk offers two different types of TFE
  coating for our leadscrews:
  – Kerkote is a soft type of TFE coating that works well
    to reduce friction and noise
  – Black Ice is a harder type of TFE coating that is
    suitable for harsh environments
• In applications where grease is allowable
  Haydon Kerk offers several types of lubricants.
  – Not all nut series are compatible with grease, the
    CMP and BFW series are fully compatible with grease
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Leadscrew and Nut Part Numbering




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•   Don’t let the standard
    catalog nuts or
    leadscrews limit your
    designs
•   Haydon Kerk has the
    capability to:
     – Design custom dies to
       make new diameters
       or leads
     – Design and make
       custom molds
     – Blend custom
       materials to get the
       optimum properties for
       your application
     – Machine the screw to
       your finished
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Motor Technology
• Haydon Kerk has
  specialized in stepper
  motor based linear
  actuators for over 30
  years.



                           • There are two distinct
                           motor technologies used,
                           canstack stepper motors
                           and hybrid stepper Sold & Serviced By:



                           motors.               ELECTROMATE
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•   The general
    design of the
    canstack motors
    is all very
    similar.
•   Haydon Kerk
    offers motors
    from 15mm to
    46mm in
    diameter.
•   The rotary to
    linear
    conversion is
    accomplished
    right inside the
    motor for the
    most compact
    assembly size.     Sold & Serviced By:


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4th Generation Can-Stack Actuator




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Hybrid Style Linear Actuator




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Both Hybrid and Can-Stack motors are available in
  three linear configurations.




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• A Non Captive style
  actuator simply has a
  threaded nut inside the
  rotor and the leadscrew
  passes through the
  motor.
• The screw must be
  secured in the application
  to keep it from rotating to
  get linear motion.
• The internal threads have
  some clearances to allow
  for misalignment in the
  system.                       Sold & Serviced By:


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• A Captive style
  actuator makes use of
  the same internal
  threaded components
  but includes a spline
  shaped shaft that is
  captured by a front
  sleeve to prevent
  rotation.
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• The third
  configuration uses a
  nut that is external to
  the motor, the screw
  is fixed to the rotor.
  This configuration is
  referred to as an
  External Linear style
  actuator. The nut
  must be held captive
  to get linear motion.     Sold & Serviced By:


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Integrated Nut
Of equal, if not greater importance to the lead screw is the nut that
   drives the screw. The nut is imbedded in the rotor of the stepping
   motor (captive and non captive styles), which makes this actuator
   configuration unique from other rotary to linear techniques.




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Hybrid rotor construction
By injection molding plastic threads within a brass rotor
assembly, both characteristics of low friction and high
bearing journal stability is achieved




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Putting It All Together
By combining all components as explained above, the
  stepper motor-based linear actuator is created. The
  following figure is a cross sectional view of a “captive”
  type linear actuator. “Captive” indicates that there is
  already an anti-rotation mechanism built into the actuator
  through the use of a spline “anti-rotation” shaft and a
  “captive sleeve”.




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Cross sectional view of a hybrid captive linear
  stepping actuator




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What is a Stepper Motor?


• A stepper motor is a brushless electric motor
  that can divide a full rotation into a number of
  smaller ‘steps’.
• These smaller steps are commonly referred to
  as the step angle of the motor.

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• Can-stack motors can have a step angle of 3.75,
  7.5 or 15 rotational degrees for each input pulse.




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• Hybrid motors can have a step angle of 0.9 or 1.8
  rotational degrees for each input pulse.




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Resolution, Accuracy, &
   Repeatability…


What’s the difference??




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RESOLUTION:

The incremental distance the actuator’s output shaft will
extend per input pulse (mm/step or in/step)



    Formula:                       LEAD
                         (360 degrees / step angle)


                                Example:
 For a 1.8 degree hybrid there are 200 steps per revolution, if you have a
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                 0.100” lead screw the resolution will be:                 ELECTROMATE
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ACCURACY:

The difference between the theoretical distance and the actual
distance traveled is the actuator’s accuracy.

Example: For a hybrid actuator utilizing a screw with a 1” lead,
360 deg of rotary motion will result in a theoretical 1” stroke.
In general, the tolerance of a Haydon hybrid linear actuator
with a 1” move will be +/- 0.0005”



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REPEATABILITY:

The range of positions attained when the actuator is
commanded to approach the same target multiple times
under identical conditions.




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• Haydon Kerk offers literally thousands of catalog
  combinations of linear stepper actuators based on:
   – Motor technology
      • Can-stack
      • Hybrid
   – Motor Configuration
      •   Captive
      •   Non captive
      •   External linear
      •   Rotary (Can-stacks only)
   – Resolution
   – Winding Configuration



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Q: How does a stepper motor work?




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Stepper motors are 2 phase devices. Rotors are
  constructed of permanent magnet materials. The rotor
  interacts with the mild steel stator which is allowed to
  change its polarity based on the input signals to each
  coil of each phase.

Every input pulse or step causes the rotor to rotate a given
  degree of rotation.

Two commonly used schemes for driving the stepper motor
  are “ One-Phase ON stepping” and “Two Phase ON
  stepping”
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“One-Phase On” Stepping Sequence
The following figure illustrates a typical step sequence for a simplified 2 phase motor. In
   step 1, phase A of the 2 phase stator is energized. This magnetically locks the rotor
   in the position shown, since unlike poles attract. When phase A is turned off and
   phase B is turned on, the rotor moves 90° clockwise. In step 3, phase B is turned off
   and phase A is turned on but with the polarity reversed from step 1. This causes
   another 90° rotation. In step 4, phase A is turned off and phase B is turned on, with
   polarity reversed from step 2. Repeating this sequence causes the rotor to move
   clockwise in 90° steps.




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“Two-Phase On” Stepping Sequence
A more common method of stepping is “two phase on” where both phases of
   the motor are always energized. However, only the polarity of one phase is
   switched at a time, as shown in the following figure. With two phase on
   stepping, the rotor aligns itself between the “average” north and “average”
   south magnetic poles. Since both phases are always on, this method
   provides 41.4% more torque than “one phase on” stepping.




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How to properly size a linear
         actuator



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Minimum Information Needed:

• The force needed to move a load. (expressed in
  Newtons)
• The distance that the load is to be moved. (expressed in
  meters)
• The time required to move the load the given distance
  (expressed in seconds)
• The mechanical power is then calculated in watts
• The required life

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Linear power: P lin ( watts ) :



P lin =   (distance traveled in Meters) (force in Newtons)
              Time to travel the distance in Seconds       = watts




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Hybrid
                                                              Max power; watts
Series   Size   Max Force (N)   Linear Travel/Step (micron)   L/R      Chopper
21000    8      45              1.5 – 40                      0.3      0.37
28000    11     90              3 – 50                        0.27     0.51
35000    14     220             1.5 – 50                      0.59     1.5
43000    17     220             1.5 – 50                      1.02     2.31
57000    23     880             4 – 50                        1.47     6
87000    34     2200            12.7 – 127                    DNA      21.19
                                 Can-stack

                                                              Max power; watts

Series   Size   Max Force (N)   Linear Travel/Step (micron)   L/R      Chopper
15000    15mm   7               20                            0.025    0.03
20000    20mm   16              25 – 100                      0.05     0.06
Z20000   20mm   35              25 – 100                      0.09     0.23
26000    26mm   50              6 – 100                       0.17     0.18
Z26000   26mm   80              6 – 100                       0.18     0.48
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36000    36mm   160             3 – 100                       0.23     0.69
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46000    46mm   260             12.7 – 400                    0.55     1.13            Toll Free Phone (877) SERVO98
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Linear Velocity (inches per second):

• When we calculated the mechanical output power, we
  defined the force, speed and travel.

• We now need to calculate the linear velocity

• The linear velocity (inches per second) is:

V lin =                 travel (inches)
           Time to achieve the travel (seconds)

• The force vs. linear velocity curves are used to determine
  proper resolution of the leadscrew to be used.
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percent load vs number of cycles

            120
            100
percent %




             80
                                                          percent load vs
             60
                                                          number of cycles
             40
             20
              0
                  1      100    10000   1000000   1E+08


                           number of cycles


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Example:                                                                                 Life expectancy
• Let us assume that we have the following
   application needs:                                            120
    1. force = 15 lbs                                            100




                                                     percent %
    2. travel = 3 inches                                          80
                                                                                                                                         percent load vs
    3. time to achieve the travel = 6 seconds                     60
                                                                                                                                         number of cycles
                                                                  40
    4. number of desired cycles = 1,000,000                       20
    5. linear velocity = 3 inches / 6 sec. = 0.5                   0
         inches per second                                             1       100        10,000   1,000,000    100,000,000
• Calculate the initial force based on number of
   cycles desired
                                                                                     number of cycles
    1. From the percent load vs. number of cycle
         table determine the % loss after the
         1,000,000 cycles.
    2. This = 50%; Therefore the initial force                                                  Hybrid
         required = 15 lbs / .5 = = 30 lbs.
    3. Convert this to Newtons. 30 / 0.225 = 133                                                           Max. Power; Watts
         Newtons                                                   Series                Size            L/R                  Chopper
• Convert travel to Meters:
    1. 3 inches X 0.0254 = 0.0762 Meters                               21000              8              0.3                        0.37
• Calculate linear mechanical power:                                   28000              11            0.27                        0.51
    1. P lin = ( 133 Newtons x 0.0762 Meters ) / 6
         sec = 1.7 watts                                               35000              14            0 .59                        1.5
    2. Using the frame size selection chart; the                       43000              17            1.02                        2.31
         proper frame size would be the size 17
         actuator:                                                     57000              23            1.47                           6
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• Choose resolution from curves.                                       87000              34            DNA                       21.19 ELECTROMATE
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Example continued:
• Verify your selection by checking force at required
  step rate.
         1.   The resolution we chose is “J”. (0.00048 inches per
              step)

         2.   Linear velocity = 0.5 inches per second

         3.   Step rate = 0.5 / 0.00048 = 1041 steps per second

         4.   Verify that the required force is present at 1041 steps
              per second using the force vs step rate curve.
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Maximum Load:
• The maximum load rating for each frame size
  actuator is shown on the force vs. step rate curve
  and appears as a horizontal dotted line labeled,
  “Recommended Load Limit”.

• Operating the actuator in excess of this value can
  result in bearing and /or thread damage and
  therefore premature life.


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Can-stack actuators are offered in a complete
 family of sizes that range from 15mm – 46mm
 with output forces of 7 N to 260 N.




Captive           Non-Captive       External

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Can-Stack Part Numbering




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Hybrid actuators are also offered in a complete
 family of sizes that range from 21mm – 87mm
 (NEMA Size 8 – Size 34) with output forces of
 45 N to 2200 N.




                   Non-Captive       External
Captive
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Hybrid Part Numbering




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How do you make a stepper motor
            move?




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Linear Actuator Drives:
• Stepper motor based linear actuators are two-phase
  devices that are required to be run by the appropriate
  drive electronics.

• These drives are either L/R drives (constant voltage) or
  chopper drives (constant current).

• Chopper drives are the predominant drives being used
  in the industry.

• L/R drives are used, but usually when a low voltage
  supply is available. (6 volt battery as an example).
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Drives – Typical Stepper Motor Control System

                                  Power                DC Supply
                                  Supply               Or Battery



                                                DC Power                        User Interface
                                                                                                 PC
                                                           Motion Profile:
                                                           (Speed, direction,                    Programmer
                        Power Pulses                       distance)
Mechanical Output                                                               Optional
                Motor                  Driver                Controller
                                                                                     PLC Microprocessor
                                                                                     Pre programmed


                                 May be discrete           May be discrete
                                 Motor mounted             or integral to
                                 or part of larger         drive
                                 circuit
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IDEA Drive
• A new chopper drive
  that can be mounted
  directly on a size 17
  actuator or is
  available as a stand
  alone drive


                              Sold & Serviced By:


                                                    ELECTROMATE
                                             Toll Free Phone (877) SERVO98
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                                                   www.electromate.com
                                                  sales@electromate.com
IDEA Drive benefits
• Single compact package – controller and driver all in
  one
• Available mounted to a size 17 actuator or as a stand
  alone unit
• Simple programming through a GUI (Graphical User
  Interface)
• Automatic population of motor and drive parameters
• USB communication
• 8 opto-isolated input/output ports
• +12 to +48VDC input range
• Simple programming and command set allows a user to
  begin using the drive quickly
• Micro-stepping capability from full step to 1/64 step ELECTROMATE
                                                      Sold & Serviced By:




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                      ELECTROMATE
               Toll Free Phone (877) SERVO98
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Guided Linear Assemblies
• Guided linear rail
  assemblies are
  available with or
  without a stepping
  motor
• Rails are available in
  a wide range of sizes
  and configurations
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                                          Toll Free Phone (877) SERVO98
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Rapid Guide Screw RGS
• The RGS is available
  with
  – 4 different diameter
    screws
  – 6 different frame sizes
  – Over 20 different leads
  – Each frame size is
    available with two
    different motor frame
    sizes
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                                             Toll Free Phone (877) SERVO98
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                                                  sales@electromate.com
Benefits of the RGS
• Can accommodate long        • Can be made with
  screw lengths due to          integral motor or powered
  intermediate screw            by your motor
  supports                    • Mounting holes can be
• Very compact profile in the   customized
  standard configuration      • Maintenance free
• Available in a wide
  configuration that adds
  additional stiffness and
  grooves for mounting
  sensors
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RGS Part Numbering




                     Sold & Serviced By:


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                                    Toll Free Phone (877) SERVO98
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                                          www.electromate.com
                                         sales@electromate.com
Linear Rail System LRS
•   The LRS was designed around
    standard T-slot profiles to allow the
    use of commercially available
    hardware
•   Designed for the size 17 actuator
    series
•   Easily accepts any anti backlash
    nut available for the ¼” diameter
    screw
•   Has a wear compensating sliding
    bearing system, never needs user
    adjustment
•   Can be used as a structural
    member in your system
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                                                                  ELECTROMATE
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LRS Part Numbering




                     Sold & Serviced By:


                                           ELECTROMATE
                                    Toll Free Phone (877) SERVO98
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                                          www.electromate.com
                                         sales@electromate.com
Screw Rail Actuator SRA
• When space is at a
  premium the SRA is a
  lead screw and
  support rod all in one
• Is also available in an
  anti backlash version
• Is available in 4
  different frame sizes
                             Sold & Serviced By:


                                                   ELECTROMATE
                                            Toll Free Phone (877) SERVO98
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SRA Part Numbering




                     Sold & Serviced By:


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                                    Toll Free Phone (877) SERVO98
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Guide Rods and Spline Rods
• Guide Rods and
  Spline Rods with
  linear bushings are
  available also
• Spline Rods are
  available with an anti-
  backlash version

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Guide and Spline Rod Part Numbering




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                                                Toll Free Phone (877) SERVO98
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Hybrid Stepper Motor Actuators    Customized Lead Screw Assemblies     Dual Motion Stepper Motor Actuators




                                                                                         Sold & Serviced By:
Canstack Stepper Motor Actuators    Motorized Linear Guides and Rails       Patented Anti-Backlash Nuts
                                                                                                               ELECTROMATE
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                                                                                                             sales@electromate.com
Haydon Kerk Motion Solutions capabilities
 include:

• Custom designs, specifically honed to the
  customer’s needs.




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Please visit us at
www.HaydonKerk.com


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Haydon Kerk motion systems linear motion presentation 2010

  • 1. Linear Systems An easy and economical way to put your ideas in motion Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 2. Q: What is the most straightforward and effective way to design a machine or mechanism that requires precise linear positioning? Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 3. Leadscrews and nuts For over 30 years Haydon Kerk has been manufacturing linear systems using leadscrew and nut systems based on a polymer nut and a stainless steel leadscrew Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 4. What are the key characteristics of the leadscrew? Diameter, also referred to as the OD or major diameter. The diameter is typically chosen to meet the load requirements in the system. Lead, this is the distance that nut would advance if you rotated the screw 360 degrees, this is commonly confused with the pitch. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 5. Lead – The axial distance a screw thread advances in a single revolution Pitch – The axial distance measured between adjacent thread forms Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 6. Leadscrew The leadscrew provides a linear force using the simple mechanical principle of the inclined plane. Imagine a steel shaft with a ramp (inclined plane) wrapped around it. The mechanical advantage (force amplification) is determined by the angle of the ramp which is a function of the lead, pitch, and diameter of the screw. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 7. • All of the screws are rolled (a cold forming process) from 303 stainless steel bars. • Other materials have been rolled such as cold rolled steel, aluminum and titanium. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 8. • The rolling process offers a lot of benefits over ground or machined threads, these benefits include: – Increase lead accuracy, especially on longer lengths – Highly polished screw surface for low friction and long life – Economical to produce Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 9. • When a leadscrew and nut are used to generate linear motion there are some clearances between the two parts to allow them to fit together without interference. These clearances are essential to the system but can lead to backlash or “lost motion” when reversing the direction of load. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 10. • When positional accuracy is not critical a freewheeling nut is a good solution. • Haydon Kerk offers freewheeling (BFW) style nuts for all of our leadscrews Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 11. What can be done to eliminate this ‘lost motion’? – If the system is mounted vertically gravity will bias the nut to one side • Caution: High acceleration or certain speeds can cause vibration, noise or momentary loss of positioning – A biasing load such as a spring can be added to the system Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 12. • A standard method for taking up backlash is to bias two nut halves axially using a precision shim or some form of compliant spring. These mechanisms all increase drag torque in the system, but many styles of nuts have been developed for all kinds of applications. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 13. Two nut halves can be biased apart by a solid spacer but in order to keep the backlash to a minimum the system would need to be continuously adjusted. • Instead of a solid shim an elastomeric ring is used to provide some compliance in the NTG series nut. • This series allows the drag torque and stiffness to be specified and or set by the end user. • The elastomeric ring provides a small amount of wear compensation. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 14. This simple compression type spring between two nut halves is a simple solution but does have some drawbacks: – The nut is very stiff in only one direction, the opposite direction is only as stiff as the spring – To move a 10 pound load you would need to have at least a 10 pound preload on the spring system this leads to high drag torques and high wear rates • For lightly loaded applications or vertical applications where some dampening is required Haydon Kerk offers the CMP (Compression) Style anti backlash nut. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 15. • For increased stiffness with a reduction in drag torque the Wedge series (WDG) nut is a good choice. • Through the use of a collapsible wedge the spring force is multiplied by about 5 to 1 to increase the stiffness. • The nut can be ‘back driven’ meaning it will not bind up on unevenly worn screws. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 16. • Another method of biasing the two nut halves is to use another threaded member in conjunction with a torsion spring to ‘push’ on one nut half. • Haydon Kerk’s KHD and VHD series nut’s use this technology. • These designs are optimized for higher load type applications where axial stiffness and low drag torque are required. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 17. • In instances where there is a light load, vibration or noise present the ZBX series of nuts is a good economical solution. • The nut uses a collet style mechanism to collapse radially onto the screw threads and remove both axial and radial clearances in the nut. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 18. • The ZBX nut is for lightly loaded applications, in cases where a higher load is required the ZBA style replaces the spring mechanism with a threaded solid collar that biases the collet fingers radially inward. • This threaded collar allows adjustment of the preload on the nut (drag torque). Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 19. • The most flexible design is the NTB nut which offers excellent axial stiffness, low drag torque and is easily customized. • The NTB nut is available across the entire range of leadscrew sizes. • Caution needs to be exercised when using this nut with very fine leads, Kerkote TFE coating is recommended. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 20. • For small or compact applications a ‘mini’ series of nuts is available in the BFW, NTG and NTB series. • Coming this summer is a ‘micro’ series based on a line of 2mm diameter leadscrews. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 21. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 22. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 23. Custom Nut Materials • Haydon Kerk’s most common nut material is a poly acetal that is fortified with Teflon for lubricity. • Haydon Kerk offers more than a dozen custom materials (Poly acetal, Nylon, PPS etc.) both with and without carbon fiber reinforcement. • The carbon fiber reinforcement is critical in applications that require a wide operating temperature range or a high load capacity. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 24. Leadscrew Coatings • While many of the different nuts series work well without any additional lubrication there are several reasons to use a lubricant (either a solid film type lubricant or a grease) these reasons are: – Increased life – Reduced drag – Improved efficiency – Dampens noise and vibration Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 25. • Haydon Kerk offers two different types of TFE coating for our leadscrews: – Kerkote is a soft type of TFE coating that works well to reduce friction and noise – Black Ice is a harder type of TFE coating that is suitable for harsh environments • In applications where grease is allowable Haydon Kerk offers several types of lubricants. – Not all nut series are compatible with grease, the CMP and BFW series are fully compatible with grease Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 26. Leadscrew and Nut Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 27. Don’t let the standard catalog nuts or leadscrews limit your designs • Haydon Kerk has the capability to: – Design custom dies to make new diameters or leads – Design and make custom molds – Blend custom materials to get the optimum properties for your application – Machine the screw to your finished requirements Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 28. Motor Technology • Haydon Kerk has specialized in stepper motor based linear actuators for over 30 years. • There are two distinct motor technologies used, canstack stepper motors and hybrid stepper Sold & Serviced By: motors. ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 29. The general design of the canstack motors is all very similar. • Haydon Kerk offers motors from 15mm to 46mm in diameter. • The rotary to linear conversion is accomplished right inside the motor for the most compact assembly size. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 30. 4th Generation Can-Stack Actuator Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 31. Hybrid Style Linear Actuator Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 32. Both Hybrid and Can-Stack motors are available in three linear configurations. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 33. • A Non Captive style actuator simply has a threaded nut inside the rotor and the leadscrew passes through the motor. • The screw must be secured in the application to keep it from rotating to get linear motion. • The internal threads have some clearances to allow for misalignment in the system. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 34. • A Captive style actuator makes use of the same internal threaded components but includes a spline shaped shaft that is captured by a front sleeve to prevent rotation. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 35. • The third configuration uses a nut that is external to the motor, the screw is fixed to the rotor. This configuration is referred to as an External Linear style actuator. The nut must be held captive to get linear motion. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 36. Integrated Nut Of equal, if not greater importance to the lead screw is the nut that drives the screw. The nut is imbedded in the rotor of the stepping motor (captive and non captive styles), which makes this actuator configuration unique from other rotary to linear techniques. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 37. Hybrid rotor construction By injection molding plastic threads within a brass rotor assembly, both characteristics of low friction and high bearing journal stability is achieved Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 38. Putting It All Together By combining all components as explained above, the stepper motor-based linear actuator is created. The following figure is a cross sectional view of a “captive” type linear actuator. “Captive” indicates that there is already an anti-rotation mechanism built into the actuator through the use of a spline “anti-rotation” shaft and a “captive sleeve”. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 39. Cross sectional view of a hybrid captive linear stepping actuator Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 40. What is a Stepper Motor? • A stepper motor is a brushless electric motor that can divide a full rotation into a number of smaller ‘steps’. • These smaller steps are commonly referred to as the step angle of the motor. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 41. • Can-stack motors can have a step angle of 3.75, 7.5 or 15 rotational degrees for each input pulse. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 42. • Hybrid motors can have a step angle of 0.9 or 1.8 rotational degrees for each input pulse. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 43. Resolution, Accuracy, & Repeatability… What’s the difference?? Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 44. RESOLUTION: The incremental distance the actuator’s output shaft will extend per input pulse (mm/step or in/step) Formula: LEAD (360 degrees / step angle) Example: For a 1.8 degree hybrid there are 200 steps per revolution, if you have a Sold & Serviced By: 0.100” lead screw the resolution will be: ELECTROMATE Toll Free Phone (877) SERVO98 0.100”/200 steps = 0.0005”/step Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 45. ACCURACY: The difference between the theoretical distance and the actual distance traveled is the actuator’s accuracy. Example: For a hybrid actuator utilizing a screw with a 1” lead, 360 deg of rotary motion will result in a theoretical 1” stroke. In general, the tolerance of a Haydon hybrid linear actuator with a 1” move will be +/- 0.0005” Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 46. REPEATABILITY: The range of positions attained when the actuator is commanded to approach the same target multiple times under identical conditions. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 47. • Haydon Kerk offers literally thousands of catalog combinations of linear stepper actuators based on: – Motor technology • Can-stack • Hybrid – Motor Configuration • Captive • Non captive • External linear • Rotary (Can-stacks only) – Resolution – Winding Configuration Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 48. Q: How does a stepper motor work? Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 49. Stepper motors are 2 phase devices. Rotors are constructed of permanent magnet materials. The rotor interacts with the mild steel stator which is allowed to change its polarity based on the input signals to each coil of each phase. Every input pulse or step causes the rotor to rotate a given degree of rotation. Two commonly used schemes for driving the stepper motor are “ One-Phase ON stepping” and “Two Phase ON stepping” Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 50. “One-Phase On” Stepping Sequence The following figure illustrates a typical step sequence for a simplified 2 phase motor. In step 1, phase A of the 2 phase stator is energized. This magnetically locks the rotor in the position shown, since unlike poles attract. When phase A is turned off and phase B is turned on, the rotor moves 90° clockwise. In step 3, phase B is turned off and phase A is turned on but with the polarity reversed from step 1. This causes another 90° rotation. In step 4, phase A is turned off and phase B is turned on, with polarity reversed from step 2. Repeating this sequence causes the rotor to move clockwise in 90° steps. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 51. “Two-Phase On” Stepping Sequence A more common method of stepping is “two phase on” where both phases of the motor are always energized. However, only the polarity of one phase is switched at a time, as shown in the following figure. With two phase on stepping, the rotor aligns itself between the “average” north and “average” south magnetic poles. Since both phases are always on, this method provides 41.4% more torque than “one phase on” stepping. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 52. How to properly size a linear actuator Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 53. Minimum Information Needed: • The force needed to move a load. (expressed in Newtons) • The distance that the load is to be moved. (expressed in meters) • The time required to move the load the given distance (expressed in seconds) • The mechanical power is then calculated in watts • The required life Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 54. Linear power: P lin ( watts ) : P lin = (distance traveled in Meters) (force in Newtons) Time to travel the distance in Seconds = watts Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 55. Hybrid Max power; watts Series Size Max Force (N) Linear Travel/Step (micron) L/R Chopper 21000 8 45 1.5 – 40 0.3 0.37 28000 11 90 3 – 50 0.27 0.51 35000 14 220 1.5 – 50 0.59 1.5 43000 17 220 1.5 – 50 1.02 2.31 57000 23 880 4 – 50 1.47 6 87000 34 2200 12.7 – 127 DNA 21.19 Can-stack Max power; watts Series Size Max Force (N) Linear Travel/Step (micron) L/R Chopper 15000 15mm 7 20 0.025 0.03 20000 20mm 16 25 – 100 0.05 0.06 Z20000 20mm 35 25 – 100 0.09 0.23 26000 26mm 50 6 – 100 0.17 0.18 Z26000 26mm 80 6 – 100 0.18 0.48 Sold & Serviced By: 36000 36mm 160 3 – 100 0.23 0.69 ELECTROMATE 46000 46mm 260 12.7 – 400 0.55 1.13 Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 56. Linear Velocity (inches per second): • When we calculated the mechanical output power, we defined the force, speed and travel. • We now need to calculate the linear velocity • The linear velocity (inches per second) is: V lin = travel (inches) Time to achieve the travel (seconds) • The force vs. linear velocity curves are used to determine proper resolution of the leadscrew to be used. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 57. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 58. percent load vs number of cycles 120 100 percent % 80 percent load vs 60 number of cycles 40 20 0 1 100 10000 1000000 1E+08 number of cycles Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 59. Example: Life expectancy • Let us assume that we have the following application needs: 120 1. force = 15 lbs 100 percent % 2. travel = 3 inches 80 percent load vs 3. time to achieve the travel = 6 seconds 60 number of cycles 40 4. number of desired cycles = 1,000,000 20 5. linear velocity = 3 inches / 6 sec. = 0.5 0 inches per second 1 100 10,000 1,000,000 100,000,000 • Calculate the initial force based on number of cycles desired number of cycles 1. From the percent load vs. number of cycle table determine the % loss after the 1,000,000 cycles. 2. This = 50%; Therefore the initial force Hybrid required = 15 lbs / .5 = = 30 lbs. 3. Convert this to Newtons. 30 / 0.225 = 133 Max. Power; Watts Newtons Series Size L/R Chopper • Convert travel to Meters: 1. 3 inches X 0.0254 = 0.0762 Meters 21000 8 0.3 0.37 • Calculate linear mechanical power: 28000 11 0.27 0.51 1. P lin = ( 133 Newtons x 0.0762 Meters ) / 6 sec = 1.7 watts 35000 14 0 .59 1.5 2. Using the frame size selection chart; the 43000 17 1.02 2.31 proper frame size would be the size 17 actuator: 57000 23 1.47 6 Sold & Serviced By: • Choose resolution from curves. 87000 34 DNA 21.19 ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 60. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 61. Example continued: • Verify your selection by checking force at required step rate. 1. The resolution we chose is “J”. (0.00048 inches per step) 2. Linear velocity = 0.5 inches per second 3. Step rate = 0.5 / 0.00048 = 1041 steps per second 4. Verify that the required force is present at 1041 steps per second using the force vs step rate curve. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 62. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 63. Maximum Load: • The maximum load rating for each frame size actuator is shown on the force vs. step rate curve and appears as a horizontal dotted line labeled, “Recommended Load Limit”. • Operating the actuator in excess of this value can result in bearing and /or thread damage and therefore premature life. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 64. Can-stack actuators are offered in a complete family of sizes that range from 15mm – 46mm with output forces of 7 N to 260 N. Captive Non-Captive External Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 65. Can-Stack Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 66. Hybrid actuators are also offered in a complete family of sizes that range from 21mm – 87mm (NEMA Size 8 – Size 34) with output forces of 45 N to 2200 N. Non-Captive External Captive Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 67. Hybrid Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 68. How do you make a stepper motor move? Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 69. Linear Actuator Drives: • Stepper motor based linear actuators are two-phase devices that are required to be run by the appropriate drive electronics. • These drives are either L/R drives (constant voltage) or chopper drives (constant current). • Chopper drives are the predominant drives being used in the industry. • L/R drives are used, but usually when a low voltage supply is available. (6 volt battery as an example). Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 70. Drives – Typical Stepper Motor Control System Power DC Supply Supply Or Battery DC Power User Interface PC Motion Profile: (Speed, direction, Programmer Power Pulses distance) Mechanical Output Optional Motor Driver Controller PLC Microprocessor Pre programmed May be discrete May be discrete Motor mounted or integral to or part of larger drive circuit Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 71. IDEA Drive • A new chopper drive that can be mounted directly on a size 17 actuator or is available as a stand alone drive Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 72. IDEA Drive benefits • Single compact package – controller and driver all in one • Available mounted to a size 17 actuator or as a stand alone unit • Simple programming through a GUI (Graphical User Interface) • Automatic population of motor and drive parameters • USB communication • 8 opto-isolated input/output ports • +12 to +48VDC input range • Simple programming and command set allows a user to begin using the drive quickly • Micro-stepping capability from full step to 1/64 step ELECTROMATE Sold & Serviced By: Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 73. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 74. Guided Linear Assemblies • Guided linear rail assemblies are available with or without a stepping motor • Rails are available in a wide range of sizes and configurations Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 75. Rapid Guide Screw RGS • The RGS is available with – 4 different diameter screws – 6 different frame sizes – Over 20 different leads – Each frame size is available with two different motor frame sizes Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 76. Benefits of the RGS • Can accommodate long • Can be made with screw lengths due to integral motor or powered intermediate screw by your motor supports • Mounting holes can be • Very compact profile in the customized standard configuration • Maintenance free • Available in a wide configuration that adds additional stiffness and grooves for mounting sensors Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 77. RGS Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 78. Linear Rail System LRS • The LRS was designed around standard T-slot profiles to allow the use of commercially available hardware • Designed for the size 17 actuator series • Easily accepts any anti backlash nut available for the ¼” diameter screw • Has a wear compensating sliding bearing system, never needs user adjustment • Can be used as a structural member in your system Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 79. LRS Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 80. Screw Rail Actuator SRA • When space is at a premium the SRA is a lead screw and support rod all in one • Is also available in an anti backlash version • Is available in 4 different frame sizes Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 81. SRA Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 82. Guide Rods and Spline Rods • Guide Rods and Spline Rods with linear bushings are available also • Spline Rods are available with an anti- backlash version Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 83. Guide and Spline Rod Part Numbering Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 84. Hybrid Stepper Motor Actuators Customized Lead Screw Assemblies Dual Motion Stepper Motor Actuators Sold & Serviced By: Canstack Stepper Motor Actuators Motorized Linear Guides and Rails Patented Anti-Backlash Nuts ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 85. Haydon Kerk Motion Solutions capabilities include: • Custom designs, specifically honed to the customer’s needs. Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com
  • 86. Please visit us at www.HaydonKerk.com Sold & Serviced By: ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com