机床产品/Machine Tool Products
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22/220 Series Controller Application Manual
Backlash Compensation–38
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9 Backlash Compensation
9.1 Preface
Due to the manufacturing error and mechanical wear, a backlash error will appear after ball screw and work bench
are assembled. Backlash is a non-contacting gapbetween the screw and bench; andwhen the machine reverts its
direction, the actual bench position and motor command position will be different.
The measurement of backlash can be done by a simple dial indicator, but generally it can also be measured during
laser pitch calibration or ball-bar calibration. When the backlash amount is measured, enter the value into backlash
compensation parameters of controller to compensate backlash error.
9.2 Specifications
Two types: Linear Way and Box Way Compensation
Linear Way Compensation: Additional position command is sent out when axis is reverting under
rapid traverse (G00), cutting (G01), or JOG mode.
Box Way Compensation: Based on the movement mode (G00 or G01) and direction (refer to axis zero)
to determine the amount of additional position commands.
9.3 Related Parameters
No Descriptions Range Unit initial occasion
1221~1240 Enable axial backlash
compensation
[0~2] - 0 Press Reset
This parameter determines if the backlash compensation function is enabled.
0: Disabled.
1: Enable Linear Way Compensation — Only compensates additional Pr1241~ amount at the moment of
reverting direction regardless in rapid traverse, cutting, or JOG mode.
2: Enable Box Way Compensation —
In rapid traverse mode (G00), the compensation amount is calculated based on Pr1241~, Pr1261~,
and current moving direction;
in cutting mode (G01/G02/G03) or JOG movement, compensates at the moment of reverting direction
with additional Pr1261~ amount.
Description of Box Way Compensation Mechanism
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