1. The machine tool cannot return to zero

Reason:

1. The contact of the origin switch is stuck and cannot move;

2. The origin stopper cannot press the origin switch to the switch action position;

3. The water in the origin switch causes the contacts of the switch to rust and the contact is not good;

4. The origin switch circuit is disconnected or the input signal source is faulty;

5. The PLC input point is burned out.

Countermeasures:

1. Clean up the stuck parts to make the moving parts move smoothly, or replace the travel switch

2. Adjust the installation position of the travel switch so that the zero-point switch contact can be smoothly pressed to the switch action position by the stopper;

3. Replace the travel switch and take waterproof measures;

4. Check that there is no open circuit or short circuit in the switch circuit and whether there is a signal source;

5. Replace the input points on the I/O board, do the parameter settings, and modify the PLC program.

In order to better serve our customers, at the same time standardize after-sales service and prevent arbitrary charges, the price list of machine tool repair parts of Hohai Company is hereby announced as follows: