Mitsubishi Electric Q172CPU - Backlash Compensation Function

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8 AUXILIARY AND APPLIED FUNCTIONS
8.2 Backlash Compensation Function
This function compensates for the backlash amount in the machine system. When the
backlash compensation amount is set, extra feed pulses equivalent to the backlash
compensation amount set up whenever the travel direction is generated at the
positioning control, JOG operation or manual pulse generator operation.
Feed screw
Backlash compensation amount
Workpiece
Fig.8.1 Backlash compensation amount
(1) Setting of the backlash compensation amount
The backlash compensation amount is one of the fixed parameters, and is set for
each axis using a peripheral device.
The setting range differs according to whether [mm], [inch] or [degree] units are
used as shown below.
(a) [mm] units
• 0 to 6.5535
(Backlash compensation amount)
• 0
(Travel value per PLS)
65535[PLS]
(Decimal fraction rounded down)
(b) [inch] or [degree] units
• 0 to 0.65535
(Backlash compensation amount)
• 0
(Travel value per PLS)
65535[PLS]
(Decimal fraction rounded down)