Reverse error (slippage) detection
Backlash error refers to the accumulated error in the feed transmission chain of a machine tool caused by factors such as the dead zone of the drive components, the backlash of the transmission pairs, and elastic deformation.
The detection method is as follows:
- Within the travel range of the axis to be measured, move the axis a certain distance in the forward or reverse direction beforehand and use this stopping position as a reference.
- Then, give a certain movement command value in the same direction to move it a certain distance.
- Then move the axis the same distance in the opposite direction and measure the difference between the stopping position and the reference position.
Perform multiple measurements (usually 7 times) at three positions near the midpoint and both ends of the travel range, and calculate the average value at each position. The maximum value among the obtained average values is the backlash error value.
The larger the backlash error, the lower the positioning accuracy and repeatability.
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