
B-63943EN-1/02 1.AXIS CONTROL
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1.3.2 Backlash Compensation
Overview
- Backlash compensation
Function for compensating for lost motion on the machine. Set a
compensation value in parameter No. 1851, in detection units from 0
to ±9999 pulses for each axis.
- Backlash compensation for each rapid traverse and cutting feed
More precise machining can be performed by changing the backlash
compensating value depending on the feedrate, the rapid traverse or
the cutting feed.
Let the measured backlash at cutting feed be A and the measured
backlash at rapid traverse be B. The backlash compensating value is
shown below depending on the change of feedrate (cutting feed or
rapid traverse) and the change of the direction of movement.
Change of feedrate
Change of
direction of movement
Cutting
feed to
cutting
feed
Rapid
traverse
to rapid
traverse
Rapid
traverse
to cutting
feed
Cutting
feed to
rapid
traverse
Same direction 0 0 ±α ±(-α)
Opposite direction ±A ±B ±(B+α) ±(B+α)
- α= (A-B) / 2
- The positive or negative direction for compensating values is the
direction of movement.
→
→
α
A
B
Stopped during cutting feed Stopped during rapid traverse
α : Overrun
- Assign the measured backlash at cutting feed (A) in parameter
No. 1851 and that at rapid traverse (B) in parameter No. 1852.