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NewsAugust 2023
Turntable for CMM
A higher powered GN9T motor is used in the drive train to rotate the sample turntable for coordinate measuring machine. Typical samples for measurement are aerospace turbine blades.
The requirement was for a very low profile servo motor with internal tachometer for speed feedback. The PMW GN9T brushed pancake motor with tacho feedback was chosen
Challenges
- Challenging Space Envelope
- Precise Velocity Control
- Accurate Velocity Measurement
Results
- Ultra Flat Printed Armature Motor
- Zero Iron Zero Cogging Design
- Integrated Tachogenerator
The overall height of the motor is sufficiently low to fit in the base plate of the turntable. Secondly, the GN9T motor uses an iron-free armature for zero cogging and no torque ripple under load, so that the motion is extremely smooth, ensuring angular precision of the workpiece
The motor is coupled to a zero-backlash strainwave gearbox, for precision angular motion. As there is a high ratio reduction gearbox between motor and turntable, even the slightest ripple in the torque would be amplified. This is eliminated with the GN9T motor.
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