12 CONTROL SUB FUNCTIONS

MELSEC-Q

12.3 Functions for compensating the control

The sub functions for compensating the control include the "backlash compensation function", "electronic gear function", and "near pass function". Each function is executed by parameter setting or sequence program creation and writing.

12.3.1 Backlash compensation function

The "backlash compensation function" compensates the backlash amount in the mechanical system. When the backlash compensation amount is set, an extra amount of pulses equivalent to the set backlash amount is output every time the movement direction changes.

The details shown below explain about the "backlash compensation function".

[1]Control details

[2]Precautions during control

[3]Setting the backlash compensation function

[1]Control details

The following drawing shows the operation of the backlash compensation function.

Worm gear

Workpiece

Backlash compensation amount

Fig. 12.8 Backlash compensation amount

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Mitsubishi Electronics QD75D, QD75P user manual Functions for compensating the control, Backlash compensation function