If your clicking press handwheel doesnot control the arm movement,Please first check the following method:
Check the condition of mutispiral spring inside the column and control whether it has been damaged.
Check that the nultispiral is tight between the two clamps to be able to transmit rotation action to the setting screw.
If you still have any problem ,maybe you could ask your local machine seller or your machine maintenance people to come check the details.
