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In a point to point control NC machine, the slides positioned by an integrally mounted stepper motor drive. If the specification of the motor is 1 deg/pulse, and the pitch Of the lead screw is 3.6 mm.
What is the expected positioning accuracy?
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- 1 micron
- 10 micron
- 50 micron
- 100 micron
Correct Option: B
For 1 revolution of lead screw side will move by 3.6 mm
1 revolution = 360° = 360 pulses 360 pulses will cause motion of 3.6 mm. 1 pulse will result in 3.6/360 mm of motion
i.e. 0.01 mm or 10 µm.
