THORLABS KBD101 User Manual page 51

Brushless DC Servo Driver K-Cube
Backlash Correction - Backlash is a term used to describe the errors inherent in
motors which use a leadscrew. Brushless linear DC motors have no leadscrew and
therefore this parameter is normally set to 0.
For motors which do incorporate a leadscrew, when this parameter is set the system
will overshoot the demanded set point by the specified amount, and then reverse.
This ensures that during absolute or relative moves, the target position is always
approached in a forward direction. The Backlash Correction Distance is specified in
real world units (millimeters).
To remove backlash correction, this value should be set to zero.
Note. Setting a negative value for backlash correction also results in zero correction.
Persist Settings to Hardware - Many of the parameters that can be set for the KBD101
series drivers can be stored (persisted) within the unit itself, such that when the unit
is next powered up these settings are applied automatically. This is particularly
important when the driver is being used manually via the top panel, in the absence of
a PC and USB link. The Move and Jog parameters described previously are good
examples of settings that can be altered and then persisted in the driver for later use.
To save the settings to hardware, check the 'Persist Settings to Hardware' checkbox
before clicking the 'OK button.
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