What is the reason why the multi-station automatic drilling and tapping machine does not advance and retreat？

What is the reason why the multi-station automatic drilling and tapping machine does not advance and retreat

1. The spring of the multi-station automatic tapping machine is too loose. Please adjust it. The spring is not restored, please replace it with a new one.

2. The adjustment of the V-belt is not tight enough or the belt is damaged.

3. The coupling of the multi-station automatic drilling and tapping machine is hot, and the elastic ring is excessively worn. Tapping machine is a machine that processes internal threads, screws or tooth buttons on the inner surface of various parts with different specifications of through holes or blind holes, such as machine shells, equipment end faces, nuts, flanges, etc. Mechanical processing equipment.