These are the steps to change the chuck on the rotary module to the 4th axis vise.

  1. Engage the emergency stop so that the rotary module stepper is de-energised.

  2. Insert a 3-4mm rod (for example the back of a 1/8" endmill) into the maintenance hole and the rotate output shaft via the chuck until rod is in the output shaft keyway. This will prevent the output shaft from freely rotating.

  3. Use a tommy bar to provide leverage. Pushing the tommy bar towards the back of the machine will tighten the chuck, pulling the tommy bar will loosen the chuck for removal. When removing the 4 jaw chuck insert the tommy bar into the body of the chuck not the nut (that just moves the jaws). Remove the 4 jaw chuck, and install the vise. Be careful to not damage the threads by cross threading. Use the tommy bar to tighten the vise onto the output shaft

  4. Remove the rod from the 4th axis maintenance hole, and disengage the emergency stop and clear the alarm on the machine.

4th Axis Vise with tommy bar
4th Axis Vise with tommy bar

Stock 4 Jaw chuck with tommy bar
Stock 4 Jaw chuck with tommy bar

Removal is the same process but removing the vice first. As breakaway torque is higher than tightening torque, to prevent injury or damage to the equiptment I strongly recommend inserting the tommy bars into a hole facing the back of the machine. This way once breakpoint is reached your hand is moving in an up/away direction and less likely to slam into the machine. 🙃