Question
A CNC worktable is driven in a linear direction by a lead screw connected directly to a stepper motor. The pitch of the lead screw is 5 mm. The stepper motor completes one full revolution upon receiving 600 pulses. If the work table speed is 5 m/minute and there is no missed pulse, then the pulse rate being received by the stepper motor is
Options :
20 kHz
10 kHz
3 kHz
15 kHz
Answer :
10 kHz
Solution :
Table speed = 5 m/minute = 5000/60 mm/sec
pitch = 5 mm
pulse per revolution = 600
So, in 1 revolution distance travel = 5 mm
So in 600 pulses distance travel = 5 mm
i.e. BLU = mm/pulses
Frequency f = =
f = 10000 Hz = 10 kHz
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