cnc machining factory master is how to deal with cnc machining center abnormal current alarm (HCAL red light is lit), the following is the experience and method
Servo unit of 185V AC after rectification into DC 300V, DC side has a detection resistor to detect DC current, if there is a short circuit behind, immediately generate the alarm.
If it is always appear, available CNC machining center multimeter to measure whether the main circuit transistor module short-circuit, replace the transistor module by itself, if not short-circuit, interchange the control board with other axes, if transferred with the control board, repair the control board.
If the CNC machining center high-speed alarm and low-speed normal may be the control board or motor problems, which can also be discerned through the exchange of servo units.
Observe whether the alarm is always alarm or occasionally, if it is always alarm is the unit or control board failure, 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 the CN2 1, 2, 3 AC +, -18V are normal.
Exchange CNC machining center control board, if the fault is transferred with the control board, it is the board fault.
Low voltage alarm? (LVAL red light is lit)
Servo control board detects the main circuit or control circuit voltage is too low, or detects circuit failure.
Check whether the three-phase 185V input voltage of CNC machining center is too low.
Check whether CN2's 1, 2, 3 AC +, -18V are normal.
Check whether the main circuit transistors, diodes, capacitors, etc. are abnormal.
Exchange the control board of the machining center, if the fault is transferred with the control board, then it is a board fault.