Backlash: Backlash parameter values allow the control to compensate for the physical limitations of the ballscrew when changing tool direction.
1851 Backlash parameter show in Picture above
Valid data range –9999 to +9999Set the backlash compensating value for each axis.
When the machine moves in a direction opposite to the reference positionreturn direction after the power is turned on, the first backlashcompensation is performed.