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In a CNC feed drive, a stepper motor with step angle of 1.8 degree drives a lead screw with pitch of 2 mm. The basic length unit (BLU) for this drive is
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- 10 microns
- 20 microns
- 40 microns
- 100 microns
Correct Option: A
Step Angle = 1.8°/pulse. pitch = 2 mm.
Distance travelled in one revolution (360°) = 2 m.
| No. of pulse in 360° = | = 200 pulse. | 1.8 |
| Distance travelled in one pulse = | mm. | 200 |
= 0.01 mm = 10 mm
