The reason why the CNC lathe can not change the knife is mainly caused by the following eight points:

a. The three-phase inverter or phase loss of the tool holder motor, the two intermodulation in the motor line of the tool holder or the external power supply;

b. The system's forward rotation control signal TL+ no output uses the multimeter quantity system outlet end, measure +24V and TL+ two contacts, and manually change the tool, see if the output voltage of these two points has +24V, if the voltage does not exist, then In case of system failure, it is necessary to send the factory to repair or replace the relevant IC components;

c. The system's forward rotation control signal TL + output is normal, but the control signal has a circuit breaker or component damage. Check whether the forward rotation control signal line is open, check whether the contacts of this circuit are in good contact; check DC relay or AC Whether the touch sensor is damaged;

d. There is no power supply for the tool holder motor: check whether there is an open circuit in the power supply circuit of the tool holder motor, whether the contacts are in good contact, whether the strong electrical components are damaged; check whether the fuse is blown;

e. Pull-up resistor is not connected: Connect the tool position input signal to the 2K pull-up resistor. If the resistor is not connected, the tool post will not turn on the microscopic. The actual action is to rotate immediately after forward rotation. Make the knife holder seem to be motionless;

f. Mechanical jam: After the hand is shaken, the tool holder rolls, and it is judged whether it is stuck by the degree of tightness. If it is, the tool holder needs to be disassembled, the machine is adjusted, and the lubricating fluid is added;

g. The mechanical lock formed by the anti-locking time is too long to mechanically relax the tool holder, and then adjust the time of the tool holder to lock through the system parameters;

h. Damage to the tool holder motor: Disassemble the tool holder motor, roll the tool holder, and see if the motor rolls. If it does not roll, and then confirm that the line is ok, replace the tool holder motor;

i. The motor of the knife holder motor forms a short circuit of the motor: dry the motor, install protection, and do the insulation method;

For more information about Shanghai Lathe Electromechanical Technology Co., Ltd. Shanghai lathe, Shanghai small CNC lathe, Shanghai CNC lathe, please contact Xiaobian.