Backlash Compensation Ii - Mitsubishi Electric M800VS Series Connection And Set Up Manual

M800VS/M80V Series Connection and Setup Manual
26 Setting the Backlash Compensation

26.2 Backlash Compensation II

26.2 Backlash Compensation II
This function reduces quadrant error caused by the backlash when the traversing direction is reversed in machines where
semi-closed loop control is implemented.
Acceleration rate at axis direction reversal varies depending on the change of circular radius and commanded speed at
machining. The most appropriate compensation amount also changes at the point. Accordingly, in the function "backlash
compensation II", up to four compensation amounts are set for each axis for each different acceleration rate, and
compensation amounts are calculated corresponding to each acceleration rate. Through the above procedures, quadrant
projections are suppressed.
Compensation based on the acceleration rate at a direction reversal improves machining accuracy. For the range between
the acceleration rates defined in parameters, the error is compensated using the compensation amount obtained through
linear interpolation.
Compensation amount
Compensation amount
according to acceleration rate
[Before the compensation]
Preset compensation
amount/acceleration rate
c
d
a
Compensation amount
"c"
a
Compensation amount
"d"
b
503
Acceleration rate
b
[After the compensation]
IB-1501613-A