YASKAWA SGD7S Product Manual page 331

8.12 Additional Adjustment Functions
8.12.8 Backlash Compensation
 Backlash Compensation Time Constant
You can set a time constant for a first order lag filter for the backlash compensation value
(Pn231) that is added to the position reference.
If you set Pn233 (Backlash Compensation Time Constant) to 0, the first order lag filter is dis-
abled.
Pn233
Note: Changes to the settings are applied when there is no reference pulse input and the Servomotor is stopped.
The current operation is not affected if the setting is changed during Servomotor operation.
Related Monitoring
You can monitor the following values on the operation monitor of the SigmaWin+.
Current Backlash Compensation Value
Backlash Compensation Value Setting Limit
Compensation Operation
This section describes the operation that is performed for backlash compensation.
Note: The following figures are for when backlash compensation is applied to references in the forward direction
(Pn230 = n.0). The following monitor information is provided in the figures: TPOS (target position in the
reference coordinate system), POS (reference position in the reference coordinate system), and APOS (feed-
back position in the machine coordinate system). The monitor information includes the feedback position in
machine coordinate system (APOS) and other feedback information.
The backlash compensation value is subtracted from the feedback positions in the monitor information, so it
is not necessary for the host controller to consider the backlash compensation value.
8-76
Backlash Compensation Time Constant
Setting Range
0 to 65,535
Displayed Value
 The encoder divided pulse output will output the number of encoder pulses for which driv-
ing was actually performed, including the backlash compensation value. If you use the
encoder output pulses for position feedback at the host controller, you must consider the
backlash compensation value.
Setting Unit Default Setting
0.01 ms 0
Setting Unit
0.1 reference units
0.1 reference units
CAUTION
When Enabled Classification
Immediately Setup