Backlash Compensation Function - Mitsubishi Electric MELSEC Q Series Programming Manual

7 AUXILIARY AND APPLIED FUNCTIONS

7.2 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.
Fig.7.1 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 MT Developer2.
The setting range differs according to whether [mm], [inch], [degree] or [pulse]
units are used as shown below.
(a) [mm] units
• 0 to 6553.5
(Backlash compensation amount)
• 0 
(Travel value per pulse)
(b) [inch] or [degree] units
• 0 to 0.65535
(Backlash compensation amount)
• 0 
(Travel value per pulse)
(c) [pulse] units
• 0 to 65535
(Backlash compensation amount)  (pulseper rotation)
• 0 
 65535[pulse]
(Note-1): The following restriction does not apply to versions compatible with the
setting range expansion of backlash compensation amount.
Ver.! : Refer to Section 1.3 for the software version that supports this function.
Feed screw
Workpiece
Backlash compensation amount
 65535[pulse]
 65535[pulse]
(Travel value per rotation)
(Note-1)
7 - 4
(Note-1)
(Decimal fraction rounded down)
(Note-1)
(Decimal fraction rounded down)
(Decimal fraction rounded down)
Ver.!