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

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

2.v-belt adjustment is not tight enough or the belt is damaged.

3. The coupling of multi-station automatic drilling and tapping machine is heated, and the elastic ring is excessively worn. Tapping machine is a kind of mechanical processing equipment for processing internal threads, screws or tooth buckles in holes of parts with different specifications, such as casing, equipment end face, nuts and flanges.