The document discusses coordinate measuring machines (CMMs). CMMs are electromechanical systems used for coordinate metrology that can convert physical measurements into electrical signals. A basic CMM consists of a probe head and probe to contact workpiece surfaces, a mechanical structure that provides motion in three axes, and displacement transducers to measure coordinate values. Modern CMMs also include a drive system and control unit to move each axis. CMMs can precisely measure complex profiles with high sensitivity and speed and are classified based on their mechanical structure.

1. COORDINATING
MEASURING MACHINE
PRESENTATION ON
PRESENTED BY:
NIKHIL BHAGAT
(13MT07IND006)

2. INTRODUCTION
• Ogden developed an inspection machine in
1956,which is considered to be the first coordinate
measuring machine (CMM).
• A Coordinating measuring machine is an
electromechanical system design to perform
coordinate metrology.
• CMMs are also considered as transducers that can
convert physical measurements into electrical
signals.
• They are versatile in their capability to record
measurement of complex profiles with high
sensitivity (0.0025 mm) and speed.

3. COMPONENTS OF CMM
To accomplish measurements in 3-D, a basic CMM
is composed of the following components:
 Probe head and probe to contact the workpart
surfaces
 Mechanical structure that provides motion of the
probe in three Cartesian axes and displacement
transducers to measure the coordinate values of
each axis
In addition, many CMMs have the following
components:
 Drive system and control unit to move each of the
three axes

4. COMPONENT OF CMM(CONT..)
PROBE:
 The contact probe is a key component
of a CMM.lt indicates when contact
has been made with the part surface
during measurement.
 The tip of the probe is usually a ruby
ball. Ruby is a form of corundum
(aluminum oxide), whose desirable
properties in this application include
high hardness for wear resistance and
low density for minimum inertia.
 Most probes today are touch-trigger
probes which actuate when the probe
makes contact with the part surface.

5. TYPES OF CMM
Ass per the mechanical structure the CMM are
classified into
six types , which are as follows:
 CANTILEVER
 MOVING BRIDGE
 FIXED BRIDGE
 HORIZONTAL ARM
 GANTRY
 COLUMN

6. MECHANICAL STRUCTURES OF
CMM

7. CMM WORKING
 After placing a workpiece on the
machine table, a probe is used
to measure different points on it
by mapping the x, y, z
coordinates.
 The probe operates either
manually via an operator or
automatically via a control
system.
 These points are then uploaded
to a computer interface where
they can be analyzed using
modeling software (e.g. CAD)
and regression algorithms for
further development.

8. CMM CONTROLLING
The methods of operating and controlling a
CMM can be classified into four main
categories:
Manual drive
Manual drive with computer-assisted data
processing
Motor drive with computer-assisted data
processing
DCC with computer-assisted data processing.

9. ADVANTAGES OF CMM
 Dimensional measurement
 Profile measurement
 Angularity or orientation
 Depth mapping
 Digitizing or imaging
 Shaft measurement

10. THANK
YOU