AMO Inductive Encoders LMI

AMO Automatisierung
M Oesstechnik ptik GmbH
LINEAR MEASURING SYSTEMS based on
the AMOSIN - Inductive Measuring Principle
®
! Inductive Encoders
comparable to Optical
Encoders in both
Accuracy and Resolution
(
! High Speeds up to
20 m/sec at 1 micron
resolution
!
!
!
±5 and ±3 micron /
meter accuracy and
down to 0.25 micron
resolution)
No Magnetic
Components
No Magnetic Field
Hysteresis or
Demagnetisation Risk
Protection Class IP 67
Fluid Submersible
Encoders
Unlimited Measuring
Lengths (>30 meters)
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Toll Free Fax (877) SERV099
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®
AMOSIN - general information
AMO's proven and original technology for length- and angle measurements uses techniques for scanning high precision graduations
consists of structures photo-lithographically etched onto steel. Based on this, inductive sensors with integrated evaluation electronics
(in ASIC) have been developed further, to create a new and powerful generation of measuring systems.
®
The AMOSIN length measuring systems are supplied in 2 principal versions: an open, non-contacting system, or as a guided,
encapsulated system.
®
Operating entirely on an inductive basis, the AMOSIN systems achieve high precisions of up to +/- 5 µm/m, but are nevertheless
very well able to resist environmental influences such as dust, humidity and so forth, also featuring an extremely high resistance to
shock and vibration.
The high precision is mainly due to the procedure used to manufacture the rigid steel measuring tape, and to the exceptionally high
quality sensor signal, with deviations in the sine wave down to < 0.1 % harmonic content, as a measure of the achievable interpolati-
on precision within the grating pitch.
As will be seen from the measuring principle described below, the measuring system does not include any magnetic parts (weither in
the measuring scale nor in the scanning head). As a result it is not at all sensitive to electromagnetic interference of any kind and has
no hysteresis, in contrast to magnetic measuring systems.
The systems output interface is either 1 Vpp sine/cosine signals, or RS-422 square wave signals, in real-time.
Not sensitive to soiling / IP 67
Not sensitive to interfering magnetic fields
High precision and resolution
General properties
High dynamic range
No functional hysteresis
Integrated reference mark,also distance coded
Machine tools
Direct drives
Metal plate working machines
SMT-pick and place machines
Measuring machines
Typical applications
Handling
Printing machines
Punching machines
Electronic production equipment
Hydraulic axes
Properties - the new generation
Analog output signals (1 Vpp) can also be delivered
with a reduced signal period of 40 µm
Digital output RS-422 / TTL with decimal resolution:
0.25 µm (1000 µm/4000) and 1µm (1000 µm/1000)
Introduction of the product group with a grating pitch of
3000 µm for high mounting tolerances.
The standard working temperature range has been
enlarged to 0-70 °C.
Dependency of the precision of the system on the
operating temperature has been significantly reduced.
Scanning head clearance (air gap between the
scanning head and the measuring tape) and its
tolerance have been increased.
The effects of mounting deviations within the
specified tolerances on the precision of the
system have been greatly reduced.
Miniaturisation of the evaluation electronics, which
has permitted integration of this circuitry into the
connector housing.
2
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®
The AMOSIN measuring systems function on the
principle of a transformer with a moving reluctance
core. The mutual inductance of the primary and
secondary windings of a transformer changes in
accordancewiththerelativepositionofthecore.
The AMOSIN system consists primarily of a planar
coil and a measuring scale (Fig.1). The coil
structure, with a number of winding elements
(individual main elements with primary and
secondary SIN/COS coils) aligned in the direction
of measurement, is implemented on a substrate
using micro-multi-layer technology. The measu-
ring scale is a stainless-steel tape onto which a
highly precise graduation (e.g. l = 1000 µm) of
variable reluctance has been etched using photo-
lithographictechniques.
The relative movement in the direction of measurement between the sensor structure (in the scanning head) and the measuring scale
periodically changes the mutual inductance of the individual coils, generating two sinusoidal signals with a 90° phase difference (SIN
and COS). The extremely accurate signal, and its immunity to environmental influences, has the effect that, after conditioning of the
signal in the evaluation electronics (Fig. 2), deviations of no more than 0.1% from the ideal sinusoidal form (harmonic content)
remains. This allows high interpolation factors (further levels of sub-division) to be carried out in the course of signal digitisation. This
can either be done in the measuring system itself, or in the subsequent electronics (CNC etc.).
An important feature of the
principle of operation is that using
®
the AMOSIN procedure does not
give rise to any measurement
hysteresis (mach-ine backlash
error). In contrast to magnetic
systems, the high-frequency
alternating field sup-presses any
hysteresis in the material.
The evaluation electronics con-
ditions the sensor signals and
interpolates them continuously,
without using strobe times,
exploiting a novel circuit principle.
It then supplies the measurement
information at the output through
differential interfaces and line
drivers, either as a sinusoidal
signal or as a square wave signal.
(see the signal diagram on Page 23)
In addition to the periodic signals
(A, B and their inverted) a
reference signal is output for the
determination of absolute posi-
tion. This signal is generated from
individual marks integrated into the
measuring scale, and does not
require any additional parts. (see
the description of the reference
signal on Page 23)
3
®
AMOSIN - the measuring principle
AMOSIN
MEASURING SYSTEM
(Fig. 2)
AMOSIN - MEASURING PRINCIPLE
(Fig. 1)
Primary windings
Secondary windings
Micro-coil
structure
Sensor substrate
Measuring scale
SIN COS SIN COS
EEPROM
configuration
data
Power supply
unit
ASIC signal
conditioning
+ evaluation
Compensation
signals
Electronic evaluation
stage
Sensor unit
Measuring scale
Analog
output
~ 1 Vpp
Encoder
output
RS 422
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Measuring accuracy
The total error of a measuring system is caused by the following measuring inaccuracies:
1. Precision of the graduation - determined by the precision of the measuring scale
2. Precision within one grating pitch - primarily determined by the quality of the sensor signal and its evaluation electronics.
The following should also be considered for the measuring systems with a 1 Vpp output interface:
3. Precision of the analog/digital conversion at the input stage of the subsequent electronics (in the controller)
4. Noise coupled into the output signals as it is transferred from the scanning head to the subsequent electronics
A detailed description of these aspects follows:
1. Scale accuracy
Every measuring scale is measured on a linear test bench, and a test certificate, quoting the precision class in accordance with
specification, is completed. Optionally a measuring diagram (measured under ideal mounting conditions) can be supplied, as
follows.
2. Precision within one grating pitch
®
These errors are extremely small on AMOSIN systems, and are in the region of 0.1 % of the grating pitch (corresponding 1 µm
for a grating pitch of 1000 µm). This maximum precision is not just relevant to the ideal set-up, but is also retained when the
mounting tolerances and working temperature range are exploited. Every scanning head is adjusted and tested on the basis of
these tight criteria of quality.
In order to suppress the errors discussed above under points "3" and "4", a new output interface has been implemented in the new
®
generation of AMOSIN systems, in which the sine, cosine and reference signals, for the 1 Vpp output interface, are divided and over
line drivers (see signal diagram on Page 23).
The dividing of the grating pitch (D) generates a signal corresponding to a pitch of 40 µm in real-time, if a measuring scale with a
grating pitch of 1000 µm is used.
The effect of any possible deviation in the evaluation (A/D conversion) in the subsequent electronics (controller etc.), is reduced in this
signal interface by exactly the dividing factor (D) that is applied. In addition, this reduced sinusoidal signal period leads to finer
quantisation in the subsequent electronics, which is of particularly great importance to demanding high dynamic and stiff drive
applications.
Additionally, the signal division reduces the effect of noise coupling on the signal transfer line, in proportion to the dividing factor "D";
in other words, an improved signal/noise ratio is achieved.
®
The metrological principle on which the AMOSIN systems operate means that they are entirely free from hysteresis.
4
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5
So that it can be dismounteded, the stainless-steel
measuring scale is fixed by means of alignment pins and
clamps in the guided, encapsulated measuring systems
from the LMI-310 series.
In the LMI-200 series, the measuring tape is permanently
bonded to the guide rail.
In the open, non-contacting systems, a double-sided
adhesive foil is applied for direct sticking on the machine
bed.
In all of these versions, the scanning still takes place
without contact, and is therefore not subject to wear.
Measuring system configuration
Measuring rail
Mounting pad
Mounting element
Measuring slider
Cover tape
Measuring scale
1. Grating pitch:
2. Type of scanning:
3. Measuring scale:
4. Scanning head:
- l = 1000 µm for maximum precision
- l = 3000 µm for larger mounting tolerances
- open - without contact
- guided - encapsulated
- measuring tape
- measuring rail
- miniature version with electronics in connector
- fully integrated electronics
The main selection criteria are illustrated in the following table.
Measuring scale
Adhesive tapeCover tape
Carrier tape
Mounting bracket
(on both ends)
Mounting element
Measuring slider
Cover tape
Measuring scale
with carrier tape
Adjusting screw
Mesuring rail
Mounting hole for
the measuring rail
Scanning head
Measuring slider LMK-310 with
integrated electronics
Measuring rail LMF-310 in single
or multiple sections for long
measuring axis
The scale can be adjusted to
compensate axis accuracy
LMI-310
Measuring slider
LMK-200 - miniature with
connector electronics
LMK-210 - with integrated
electronics(not figured)
Miniature measuring rail LMF-200
with welded scale
LMI-200
Measuring head
LMK-100 - miniature with
LMK-110 - with integrated
electronics(not figured)
Measuring scale for direct sticking
on the machine base
LMI-100
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6
l = 1000 µm l = 3000 µm
LMI-100
LMI-110
Selection table:
Grating pitch
LMI-130
LMI-200
LMI-210
LMI-310
LMB-100 Page 07
LMK-100 Page 07
LMB-110 Page 09
LMK-110 Page 10
-
-
LMF-200 Page 14
LMK-200 Page 15
LMF-200 Page 17
LMK-210 Page 17
LMF-310 Page 19
LMK-310 Page 21
-
-
-
-
LMB-130 Page 12
LMK-130 Page 12
-
-
-
-
-
-
Measuring scale
Scanning head miniature
Measuring scale
Scanning head
Measuring scale
Scanning head
Measuring rail
Measuring slider miniature
Measuring rail
Measuring slider
Measuring rail
Measuring slider
Withoutcontact
Open
Guided
Encapsulated
Measuring systems for open, non-contact scanning with grating pitch of l=1000µm
Open measuring system
Miniature design with connector electronics
No wear
Ideal for applications with high dynamic range
High precision
Suited for long axis
Devided sinus output of 40 µm
LMI-100
Connector dimensions see page 25
Main features:
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Technical Data:
Grating pitch:
Linearity error:
Coefficient of expansion:
Measuring length:
Mechanical execution:
Reference position:
1000 µm
LMB-100.0 =±20 µm
LMB-100.1 =±10 µm
LMB-100.2 =± 5 µm
~11ppm
Up to a maximum of 30 m
Stainless-steel measuring tape, with adhesive layer for mounting
Normally in the middle, any position and number, or distance-encoded (see description on page 24)
0
LMB-100 measuring tape
Tape length in mm
LMB-100. - - RI position (like above sketch)
0 ... none
1 ... 50 mm from the left
2 ... central
3 ... 50 mm from the right
6 ... 50 mm from both sides
8 ... all 100 mm
9 ... Special RI position(s) (requires a special no. Sxx)
K1 … distance-coded (basic spacing 40 mm)
Ordering code:
LMK-10 scanning head
Operating temperature:
Storage temperature:
Protection class:
Vibration:
Shock:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
0° to 70° C (higher temperatures by request)
-20°C to 85°C
Scanning head: IP 67
Connector electronics / versions with CONNEI connector: IP 67
Connector electronics / version with 15-pin Sub-D connector: IP 54
2
<400 m/s for 55 - 2000 Hz
2
<2000 m/s for 6 ms
See the following table (sensor lines available, see page 26)
PUR jacket, high flexibility, dmr. 5.3 mm, 5(2x0.05) + 1 (2x0.14) mm²
(Bending radius: 10 x d = 50mm continuous bending; 5 x d = 25mm single bend)
! LMK-101. analog output 1 Vpp to 120 W terminating resistor·
with sinus output of 1000 µm or 40 µm
! LMK-102. TTL output - resolution as in the following table
Limit switch function (see description on page 22)
LED on the connector housing as an assembly aid (by request)
W
LMK-101.0
LMK-101.3
1 Vpp/1000 µm
1 Vpp/40 µm
Type Output signal/resolution
10 m/s
10 m/s
Speed
LMK-102.0
LMK-102.1
LMK-102.4
LMK-102.5
TTL/10 µm*
TTL/5 µm*
TTL/1 µm*
TTL/0.25 µm*
10 m/s
2.5 m/s
20 m/s
7
Linearity error
0 ... ±20 µm
1 ... ±10 µm
2 ... ± 5 µm0
*) after 4x edge evaluation
(see diagram on page 23)
260 mA
260 mA
Power Supply 5V ±5%
300 mA
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LMK-101. --
Ordering code:
- Connector / version
5 ... 15-pin Sub-D plug
6 ... 12-pin CONNEI coupling (male)
screwed cable gland at the input
6A ... 12-pin input CONNEI coupling (female)
output 12-pin CONNEI coupling (male)
0
0
06 ...
6A ...
Cable length (in whole metres)
1 ... 1m (preferred length)
2 ... 2m
X ... special length (may require a special no. Sxx)
Signal period
0 ... 1000 m
3 ... 40 m
µ
µ
Limit switch
0 ... none
1 ... with
L ... reference pulse selectable
Limit switch
0 ... none
1 ... with
LMK-102. -- - Connector / version
0
0
06 ...
6A ...
2 ... 2m
Resolution
after 4x edge
evaluation
0 ... 10 m
1 ... 5 m
4 ... 1 m
5 ... 0.25 m
µ
µ
µ
µ
0
0
Scanning head with 1 Vpp output signal – LMK-101
Scanning head with TTL (RS422) output signal – LMK-102
Dimensions:
8
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Grating pitch:
Linearity error:
Measuring length:
Reference position:
1 mm
LMB-110.0 =±20 µm
LMB-110.1 =±10 µm
LMB-110.2 =± 5 µm
~11ppm
Stainless-steel measuring tape, with adhesive layer for mounting
Normally in the middle, any position and number, or distance-coded (see description on page 24)
0
Tape length in mm
LMB-110. - - RI position (like above sketch)
0 ... none
2 ... central
8 ... all 100 mm
Ordering code:
Linearity error
0 ... ±20 µm
1 ... ±10 µm
2 ... ± 5 µm0
9
Suited for long axis
Devided sinus output of 40 µm
Integrated electronics
No wear
Ideal for applications with
high dynamic range
High precision
Technical Data:
Main features:
LMI-110
Also available in - design for explosion sensitive
environments (see datasheet or www.amo.at)
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Abtastkopf LMK-11
0°C to 70°C (higher temperatures by request)
-20°C to 85°C
2
<200 m/s for 55 - 2000 Hz
2
<1000 m/s for 6 ms
Maximum length 9m, up to 50m with extension cable (see page 26)
W
LMK-111. --
Ordering code:
-
Signal period
0 ... 1000 m
3 ... 40 m
µ
µ
Scanning head with 1 Vpp output signal - LMK-111 Connector / version
0 ... none
1 ... 12-pin DIN connector
4 ... 12-pin CONNEI plug (male)
9 ... special connector or special pin-out
(requires special no. Sxx)9 ...
9 ... 9 m
LMK-112. -- -
Scanning head with TTL (RS422) output signal - LMK-112 Connector / version
0 ... none
9 ... 9 m
Resolution
after 4x edge
evaluation
0 ... 10 m
1 ... 5 m
4 ... 1 m
5 ... 0.25 m
µ
µ
µ
µ
0
0
10
Protection class:
Vibration:
Shock:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
Limit switch
0 ... none
1 ... with
Limit switch
0 ... none
1 ... with
LMK-111.0
LMK-111.3
1 Vpp/1000 µm
1 Vpp/40 µm
10 m/s
10 m/s
Speed
LMK-112.0
LMK-112.1
LMK-112.4
LMK-112.5
TTL/10 µm*
TTL/5 µm*
TTL/1 µm*
TTL/0.25 µm*
10 m/s
2.5 m/s
20 m/s
200 mA
260 mA
*
*
The - option is designated - EX2*
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Dimensions:
Measuring systems for open, non-contact scanning with grating pitch of l=3000µm
No wear
Wide mounting tolerances
LMI-130
11
Main features:
Also available in - design for explosion sensitive
environments (see datasheet or www.amo.at)
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Technical Data:
Grating pitch:
Linearity error:
Measuring length:
Reference position:
3 mm
LMB-130.0 =±20 µm
~11ppm
Stainless-steel measuring tape,
with adhesive layer for mounting
Normally in the middle, any position is possible
Tape length in mm
LMB-130. - -
RI position (like above sketch)
0 ... none
2 ... central
8 ... all 90 mm
Ordering code:
Abtastkopf LMK-13
-20°C to 85°C
2
<200 m/s for 55 - 2000 Hz
2
<1000 m/s for 6 ms
! LMK-131. analog output 1 Vpp to 120 W terminating resistor
W
LMK-131.0
LMK-131.3
1 Vpp/3000 µm
1 Vpp/120 µm
30 m/s
30 m/s
Speed
LMK-132.0
LMK-132.1
LMK-132.4
LMK-132.5
TTL/30 µm*
TTL/15 µm*
TTL/3 µm*
TTL/0.75 µm*
30 m/s
7.5 m/s
60 m/s
Linearity error
0 ... ±20 µm
12
Protection class:
Vibration:
Shock:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
200 mA
260 mA
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Limit switch
0 ... none
1 ... with
LMK-131. --
Ordering code:
-
Signal period
0 ... 3000 m
3 ... 120 m
µ
µ
Scanning head with 1 Vpp output signal - LMK-131 Connector / version
0 ... none
9 ... 9 m
LMK-132. -- -
Scanning head with TTL (RS422) output signal - LMK-132 Connector / version
0 ... none
9 ... 9 m
Resolution
after 4x edge
evaluation
0 ... 30 m
1 ... 15 m
4 ... 3 m
5 ... 0.75 m
µ
µ
µ
µ
0
Dimensions:
13
Limit switch
0 ... none
1 ... with
The - option is designated - EX2*
*
*
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Measuring systems for guided - encapsulated scanning with grating pitch of l=1000µm
Miniature measuring rail
Miniature measuring slider with
Stainless-steel version
Ideal for tough environment
High precision
Large mounting tolerances of±1 mm
over flexure element
LMI-200
Technical Data:
Grating pitch:
Accuracy:
Measuring length:
Reference position:
1 mm
LMF-200.0 =±20 µm
LMF-200.1 =±10 µm
LMF-200.2 =± 5 µm
~11ppm
120 / 170 / 220 / 270 / 320 / 420 / 520 / 620 / 720 / 820 / 920 / 1020 mm
Longer lengths by request
Standard in the middle, any position and number, or distance-coded (see description on page 24)
0
LMF-200 measuring rail
Measuring length in mm
Standard: 120 / 170 / 220 /
270 / 320 / 420 / 520 / 620 /
720 / 820 / 920 / 1020
LMF-200. - - RI position (like above sketch)
0 ... none
2 ... central
8 ... all 100 mm
Ordering code:
Accuracy
0 ... ±20 µm
1 ... ±10 µm
2 ... ± 5 µm0
14
Connector dimensions
see page 25
Main features:
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LMK-20 - measuring slider
-20°C to 85°C
Connector electronics / versions with CONNEI connector: IP 67
Connector electronics / version with 15-pin Sub-D connector: IP 54
LED on the connector housing as an assembly aid (by request)
W
LMK-201.0
LMK-201.3
1 Vpp/1000 µm
1 Vpp/40 µm
1)
3 m/s
1)
3 m/s
Speed
LMK-202.0
LMK-202.1
LMK-202.4
LMK-202.5
2)
TTL/10 µm
2)
TTL/5 µm
2)
TTL/1 µm
2)
TTL/0.25 µm
1)
3 m/s
2.5 m/s
3 m/s 1)
1) 2)
limited by the mechanics after 4x edge evaluation
LMK-201. --
Ordering code:
- Connector / version
0
0
06 ...
6A ...
2 ... 2m
Signal period
0 ... 1000 m
3 ... 40 m
µ
µ
LMK-202. -- - Connector / version
0
0
06 ...
6A ...
2 ... 2m
Resolution
after 4x edge
evaluation
0 ... 10 m
1 ... 5 m
4 ... 1 m
5 ... 0.25 m
µ
µ
µ
µ
0
0
Measuring slider with 1 Vpp output signal evaluation - LMK-201
Measuring slider with TTL (RS422) output signal - LMK-202
15
Protection class:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
Limit switch
0 ... none
1 ... with
Limit switch
0 ... none
1 ... with
260 mA
300 mA
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LMI-210
Miniature measuring rail
Measuring slider with integrated electronics
Stainless-steel version
Ideal for rough environment
High precision
Dimensions:
Main features:
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Technical Data:
Grating pitch:
Accuracy:
Measuring length:
Reference position:
1 mm
LMF-200.0 =±20 µm
LMF-200.1 =±10 µm
LMF-200.2 =± 5 µm
~11ppm
120 / 170 / 220 / 270 / 320 / 420 / 520 / 620 / 720 / 820 / 920 / 1020 mm
0
Measuring length in mm
Standard: 120 / 170 / 220 /
270 / 320 / 420 / 520 / 620 /
720 / 820 / 920 / 1020
LMF-200. - - RI position (like above sketch)
0 ... none
2 ... central
8 ... all 100 mm
Ordering code:
Accuracy
0 ... ±20 µm
1 ... ±10 µm
2 ... ± 5 µm0
-20°C to 85°C
Limit switch function
W
LMK-211.0
LMK-211.3
1 Vpp/1000 µm
1 Vpp/40 µm
1)
3 m/s
1)
3 m/s
Speed
LMK-212.0
LMK-212.1
LMK-212.4
LMK-212.5
2)
TTL/10 µm
2)
TTL/5 µm
2)
TTL/1 µm
2)
TTL/0.25 µm
1)
3 m/s
2.5 m/s
3 m/s 1)
1) 2)
17
Protection class:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
200 mA
260 mA
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LMK-211. -- -
Measuring slider with 1 Vpp output signal - LMK-211 Connector / version
0 ... none
9 ... 9 m
LMK-212. -- -
Measuring slider with TTL (RS422) output signal - LMK-212 Connector / version
0 ... none
9 ... 9 m
Resolution
after 4x edge
evaluation
0 ... 10 m
1 ... 5 m
4 ... 1 m
5 ... 0.25 m
µ
µ
µ
µ
0
0
18
Dimensions:
Ordering code:
Limit switch
0 ... none
1 ... with
Limit switch
0 ... none
1 ... with
Signal period
0 ... 1000 m
3 ... 40 m
µ
µ
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Measuring systems for guided - encapsulated scanning with grating pitch l=1000µm
Robust mechanical design
Ideal for tough environment
and long measuring lengths
(single or multiple sections)
High precision
Easy mounting and large ounting
tolerances of±1 mm over
flexure element
LMI-310
Technical Data:
Grating pitch:
Accuracy:
Measuring length:
Reference position:
1 mm
LMF-310.0 =±20 µm
LMF-310.1 =±10 µm
LMF-310.2 =± 5 µm
~11ppm
a) One-piece measuring rail:
70, 130, 190, ... ML=((n-1) x 60) - 50 [mm] ML max. 3790 mm
n ... number of fastening holes n ³ 3
b) Multi-piece measuring rail:
Any desired ML (in steps of 60 mm) but with the condition: ML=((n-1) x 60) - 50 [mm], n ³ 3
0
19
Dimensions of measuring rail LMF-200
Main features:
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Measuring length (ML) in mm
L max. 3790 mm for
one-piece version
Any ML for
multi-piece version
LMF-310. - - RI position (like sketch Page 19)
0 ... none
2 ... central
8 ... all 100 mm
Ordering code:
Accuracy
0 ... ±20 µm
1 ... ±10 µm
2 ... ± 5 µm0
Surface
0 ... without
1 ... with Cr coating
Dimensions:
20
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Protection class:
Power supply:
Cable:
Output signals:
Optional:
Max. Speed:
-20°C to 85°C
! LMK-311. analog output 1 Vpp to 120 W terminating resistor
W
1) 2)
Technical Data:
21
LMK-311.0
LMK-311.3
1 Vpp/1000 µm
1 Vpp/40 µm
1)
3 m/s
1)
3 m/s
Speed
LMK-312.0
LMK-312.1
LMK-312.4
LMK-312.5
2)
TTL/10 µm
2)
TTL/5 µm
2)
TTL/1 µm
2)
TTL/0.25 µm
1)
3 m/s
2.5 m/s
3 m/s 1)
200 mA
260 mA
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Connector / version
0 ... none
9 ... 9 m
Signal period
0 ... 1000 m
3 ... 40 m
µ
µ
Surface
0 ... without
LMK-311. --
Measuring slider with 1 Vpp output signal - LMK-311
-
-- -
Measuring slider with TTL (RS422) output signal - LMK-312
Surface
0 ... without
Resolution
after 4x edge
evaluation
0 ... 10 m
1 ... 5 m
4 ... 1 m
5 ... 0.25 m
µ
µ
µ
µ
0
0
LMK-312.
Limit switch function
The limit switch sensor is located in the centre of the scanning head (see mounting drawing).
The limit switch output is implemented as an open-collector circuit (see circuit diagram).
Limit switch function output circuit:
22
Connector / version
0 ... none
9 ... 9 m
Ordering code:
Limit switch
0 ... none
1 ... with
L ... reference pulse
selectable
Limit switch
0 ... none
1 ... with
L ... reference pulse
selectable
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Recommended wiring of the subsequent electronics:
Description of the output signals
Recommended wiring of the subsequent electronics:
• A+, B+, RI+ (and their inverted signals):
direct signal output, dividing factor D=1
• A´+, B´+, RI´+ (and their inverted signals):
divided signal output with dividing factor D=1
• LL, LR limit switch signals
1 Vpp output signals
TTL - RS422 output signals
23
Phase shift 90° ±45°
Output period
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In order to determine the absolute position in the direction of measurement between the scanning head and the measuring tape, a
reference track is integrated on to the measuring scale, lying parallel to the measuring track.
This reference track consists of one or more reference marks (correspondingly marked on the measuring tape), which are detected by
the sensors in the scanning head.
They can be realised at any desired position on the measuring tape.
Reference pulse in the middle of the measured length is the standard
configuration. Special positions are possible (see the ordering codes).
Description of the reference marks
First basic mark
K=XX
Positive direction
of counting
Basic spacing
Signal not divided (dividing factor D=1)
All LMI systems with measuring pitch of 1 mm
are offered with coded reference marks having
the following basic spacings (K):
Signal subject to analog division (dividing factor D = 1)
24
The reference marks can be arranged in the following ways.
Coded positioning of the reference marks on the measuring tape allows
the controller (in case this one has such an implemented function), to
determine the absolute position of the slider after passing over two
consecutive coded marks.
Basic spacing K (mm)
40K 1 720
80K 2 3120
120K 3 7080
Max. measuring length (mm) MLmax
1. Single reference marks - fix position
3. Distance-coded reference marks
Identifier:
Identifier:
The reference pulse in the desired resolution is validate at the output through a
magnet switch. The movement of the measuring slider along the measuring stroke
near the switch magnet (delivered for this configuration as in the drawings page 8,
11, 13, 16, 18, 20) triggers the reference pulse. The traveling direction for reference
mark (home position) must be always the same to get reproductible reference
position. The mounting position of the magnet along the measuring scale is free
selectable. In this Measuring head configuration is the limit switch option not
available.
2. Single reference marks - selectable Identifier:
Reference mark
Reference mark
usually D=25, for 1000 m / 25 = 40 m sinus signal period.µ µ
K' = K x D
K' –> Number of sinus periods after division
at the output of the measuring system
K
= =K K K K
2 2 2 2+1 -1 +2 -2
K
³20 ³20
RI RI RI RI RI RI
K
2ML =max x (K-2)
Count direction
RI
K
2 +3
K+1 K+1
K'
= =K' K K' K'
2 2 2 2+D -D +2D -2D
K'
³20 ³20
RI RI RI RI RI RI
K'
2ML =max x (K'-2)
Count direction
RI
K'
2 +3D
K'+D K'+D
K –> Number of sinus periods of 1000
at the output of the measuring system
µm
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25
Dimensions for connector electronics
Connector electronics - design type 6
(see ordering codes)
Connector electronics - design type 6A
Connector electronics - design type 5
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26
SUB-D connector 15-pin
Sine-wave 1 Vpp or Square-wave output signals TTL
Shield on housing
PIN
Signals
1
B-
2 3 4 5 6 7 8 9 10 11 12
0VA+ LRB+ — RI-+5V
Color bluegreen blackbrown greyred white—
39,2
13
4 5
12
321
11109
6 7 8
13 14 15
A-
yellow
LL
violet
RI+—
pink—
—
—
13 14 15
0V-Sensor
blue-white
5V-Sensor
red-white
Pin side
9 1
2
3
45
6
7 12
8
11
10
51
26
28
CONNEI- connector adv. coupling 12-pin - plastic-coated metal body
Shield on housing
PIN
Signals
1
B-
2 3 4 5 6 7 8 9 10 11 12
0VA+ A- B+RI+ RI- +5V
Color bluegreen yellow brownpink grey redwhite
5V-Sensor
red-white
LL
violet
LR
black
0V-Sensor
blue-white
The sensor lines 0V sensor and 5V sensor are connected internally to the corresponding supply lines. They serve the purpose of checking and readjusting the
supply voltage at the device and can also be used parallel to the 0V and 5V supply lines for the purpose of reducing the voltage drop in the line.
In case that the option "Limit Switch" is not used, it is not allowed to connect the pins "LL" and "LR" to the following electronics (for example controller). These
pins serve alone for test purposes only with the AMO testdevice STU-10.
26
53
25,5
M23x1
9 8
7
6
54
3
2 10
1
11
12
Pin side
Connector Coupling
—
DIN connector 12-pin L120
Square-wave output signals TTL
Sine-wave output signals 1 Vpp
Shield on housing
PIN
Signals
A B C D E F G H J K L M
0V A+ A- B+ — RI+ RI- — —+5V B-
18
42
70
Pin side
K
A
J
H
B
L C
M
G
F
E
D
—Color blue green yellow brown — pink grey — —red white
30,8
13
4 5
9
321
876
SUB-D connector 9-pin
Shield on housing
PIN
Signals
1
B-
2 3 4 5 6 7 8 9
0V A+A- B+ RI+RI-— +5V
Color blue greenyellow brown pinkgrey— redwhite
Measuring system
Socket Pin
Order designation: --
00 ... with no Connector
01 ... 12 pin DIN
03 ... 9 pin Sub-D
04 ... 12 pin Connei connectot CW
05 ... 15 pin Sub-D
06 ... 12 pin Connei coupling CCW
09 ... Special connector or
special pin assignments
10 ... with no Coupling
11 ... 12 pin DIN
13 ... 9 pin Sub-D (standard)
14 ... 12 pin Connei connector CW
15 ... 15 pin Sub-D
16 ... 12 pin Connei coupling CCW
19 ... Special connector or
special pin assignments
Cable length
in metre
VK - 4 -
Extension cable
Plug and connection assignements
Extension cable
In case that the option "Limit Switch" is not used, it is not allowed to connect the pins "LL" and "LR" to the following electronics (for example controller).
These pins serve alone for test purposes only with the AMO testdevice STU-10.
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27
Digital read out equipments
For manual drived equipments or the retrofitting of conventional machines for the visualisation of the measuring values (length or
angle) can be used the DRO type (DP-10, DP-20, DP-30)
Please ask for documentation.
Main Features
Reset
Preset
Reference point
Absolute chain distances
mm/inch switch
Tool correction
Angle measurement (optional)
Linear compensation
Radius/diameter switching
Speed measurement
Resolution programable
Counting direction programable
Battery back up (optional)
Supply 220V or 110 V
Interface RS 232 (optional)
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