Problem while changing the tool post position

Every time when the tool post changed to the No.2 position under the AUTO mode, the spindle motor and coolant pump will stop.

Try to delete the tool changing command in the CNC program, the program runs well, and then input again the No.2 tool change command, the spindle motor and coolant pump stops, at the mean time the screen of the CNC controller flicker one time. (from http://www.cncmakers.com)

Diagnose: if there are tool post, spindle motor, coolant pump stop issues, we can check below:

1-      The +24V power of CNC controller lost due to the tool post control feedback cable’s short circuit.

2-      The +24V power of CNC controller lost due to the inductive sensor of tool post short circuit.

3-      The +24V power of CNC controller lost due to the I/O board sockets short circuit.

4-      Mechanical parts get stuck causes circuit protection, then the spindle motor and coolant pump stop.

In this case we know that it must be the short circuit, because the screen of the CNC controller flickers, go to the Diagnose menu and check the input signals of each tool post position, and found the No.2 tool has no signal change, replace the inductive sensor the CNC lathe resume to work.