Industry Information

How to deal with abnormal current alarm of CNC machining center

How-to-deal-with-abnormal-current-alarm-of-CNC-machining-centerHow-to-deal-with-abnormal-current-alarm-of-CNC-machining-center

How does the expert deal with the abnormal current alarm of the cnc machining center (the HCAL red light is on), the following are the experiences and methods

The 185V AC of the servo unit is rectified to become DC 300V, and a detection resistor on the DC side detects the DC current. If there is a short circuit in the back, the alarm is immediately generated.

If it keeps appearing, you can use a CNC machining center multimeter to measure whether the main circuit transistor module is short-circuited. Replace the transistor module yourself. If it is not short-circuited, exchange the control board with other axes. If it is transferred with the control board, repair the control board.

If the CNC machining center has a high-speed alarm and the low speed is normal, it may be a problem with the control board or motor. This can also be determined by exchanging the servo unit.

Observe whether it is always alarming or occasional. If it is always alarming, it means the unit or the control board is faulty, otherwise it may be the motor.

CNC machining center high voltage alarm (HVAL red light is on)

Check whether the three-phase 185V input voltage is normal.

Check if CN2’s 1, 2, and 3 AC + and -18V are normal.

Exchange the control circuit board of the CNC machining center. If the fault transfers with the control board, the circuit board is faulty.

Low voltage alarm? (LVAL red light is on)

The servo control board has detected that the main circuit or control circuit voltage is too low, or the circuit failure is detected.

Check whether the three-phase 185V input voltage of the CNC machining center is too low.

Check if CN2’s 1, 2, and 3 AC + and -18V are normal.

Check the main circuit transistors, diodes, capacitors, etc. for any abnormalities.

The control circuit board of the exchange processing center, if the fault is transferred with the control board, it is a circuit board failure.

Leave a Reply