Some machines have an absolute encoder on the Bending Beam, Clamping Beam and/or Radius Adjustment. Since the encoder is absolute, it does not need to be “reset” based on a switch. However, it does need to track all of the range of motion of the axis to which it is tied, with values between zero and its maximum.
If your machine has an absolute encoder on any of its axes, your calibration screen for each axis will have a Reference Encoder button. Pressing this button will reset the encoder to a value in the middle of its range of motion. If this button is not present, there is no encoder to reference.
Note: It is important that you reference the absolute encoder before continuing to calibrate each axis. Failure to do so could result in inaccurate calibration.
To reference an absolute encoder, move the axis to a position in the middle of its range of motion. Once there, click Reference Encoder on the calibration screen. This will reset the encoder to a value in the middle of its valid range. Then, when calibrating, you ensure that all of the feedback measurements that you are recording are above zero.
Please note that if you press Reference Encoder when the axis has already been calibrated, all calibration data for that axis is removed.