I got a response from Polabs.
This is disappointing because all that trouble on getting the servo running was for nothing. Now I need to switch to velocity mode.Hi, Suat
Unfortunately, step/dir driven spindles are not supported by the PoKeys device during threading cycle. During normal operation, all axes are fed by a constant flow of position references and at the moment of waiting for the threading trigger, the flow is stopped, which stops the spindle as well. Alternatively, threading can be executed as a CAM operation instead of G-code operation.