1. Coordinate Measuring Machines (CMM’s)
Charlie McLean
CEE 398

2. Components The machine itself The measuring probe many types
strong granite base
precision engineering
The measuring probe
electronic touch
all shapes and sizes

3. Components (cont) The control or computing system
operator controled
computer numerical control PC
The measuring software
automatic everything
CAD
3-D graphics windows

4. Types of CMM’s Articulated arm Bridge portable or tripod mounted
probe can be placed in many different directions
Bridge
horizontally suspended
x-axis carries the bridge

5. Types of CMM’s (cont) Cantilever Gantry
supports probe from movable vertical support
Gantry
frame structure raised on side supports
similar to bridge style

6. Mounting Options
Benchtop
Freestanding
Handheld
Portable

7. Common Applications Dimensional measurement Profile measurement
Angularity or orientation
Depth mapping
Digitizing or imaging
Shaft measurement

8. Buying CMM’s Specifications X,Y,Z measurement length Operation
Resolution
Workpiece weight
Control
Operation
Mounting Options
Probe/Sensor type
Application features
General applications

9. Buying CMM’s (cont) Companies Cost L.S. Starret Co. Helmel
LK Metrology Systems
Mahr Federal Inc.
Faro Technologies, Inc.
Carl Zeiss, Inc.
Cost
Wide range depending on CMM

10. References http://www.helmel.com/