During the use of the small drill cnc machine, the automatic rotary tool holder often fails, and many people do not know how to solve it. Now the drill cnc machine manufacturer will introduce the rotary tool holder faults and troubleshooting measures that have been encountered. Fault 1: drill cnc machine tool holder does not rotate (the general system will prompt the position signal of the frame is wrong), there are many reasons that can cause the tool holder to not rotate. Cause...