May. 23, 2025
1. Mechanical reasons: The tool holder preload is too large. When a wrench is inserted into the end of the worm, it is
not easy to rotate, but it can be rotated when force is applied. However, the tool holder still cannot start after the
next clamping. When this phenomenon occurs, it can be determined that the reason why the tool holder cannot
start is that the preload is too large, which can be eliminated by reducing the clamping current of the tool holder motor.
The tool holder is mechanically stuck inside. When the worm is rotated from the end of the worm, it
cannot be turned clockwise. The reason is mechanical stuck.
First, check whether the back-receiving positioning pin of the clamping device is in the back-receiving ratchet
groove. If so, the back-receiving ratchet and the screw connecting pin hole need to be rotated back an angle and
re-drilled and connected; then, check whether the spindle nut is locked. If the nut is locked, it should be
readjusted; finally, due to poor lubrication, the rotating parts are ground to death. At this time, they
should be disassembled, the actual situation should be observed, and lubrication should be performed.
2. Electrical reasons: The power supply is not connected and the motor does not rotate. Check whether the
fuse is intact, whether the power switch is connected well, whether the switch position is correct, and
whether the voltage value is within the specified range when measuring the voltage with a multimeter.
This can be eliminated by replacing the fuse, adjusting the switch position, and making the connection
part contact well. In addition, the reasons for the power failure can also be considered as the cable break
between the tool holder and the controller, the internal wire break of the tool holder, and the change of
the position of the brush-type Hall element causing it to fail to switch normally.
