M800S/M80/E80 Series Connection and Setup Manual
26 Setting the Backlash Compensation
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IB-1501269-J
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.
[Before the compensation] [After the compensation]
Compensation
amount "c"
Compensation
amount "d"
d
a b
c
Compensation amount
according to acceleration rate
Compensation amount
Acceleration rate
Preset compensation
amount/acceleration rate
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