Fault phenomenon: A CNC machine tool equipped with FANUC 0MC system, model XH754, the tool magazine keeps rotating during the tool change process.

Analysis and processing process: Use a screwdriver to screw the manual button of the tool magazine telescopic solenoid valve to the extended position of the tool magazine, ensuring that the tool magazine is always in the extended state, reset, manually remove the current tool from the tool magazine, stop the machine and cut off the power, use Tighten the square head shaft of the tool magazine gear box with a wrench to rotate the empty tool claw to the spindle position. After alignment, use a screwdriver to turn off the manual button of the solenoid valve and return the tool magazine to its original position. Check again that the tool magazine zero return switch and tool magazine motor cable are normal, restart the machine and return to zero normally, and tool changing in MDI mode is normal. It was suspected that it was caused by interference. After removing the ground wire, the fault never occurred again.