System analysis of commutation failure control linear cutting machine

Electrical control system of linear cutting machine. Machine control system state normal line cutting, but the machine go start the motor can not wiresystem: This is generally the total lack of power (but also pay attention tobecause of the broken phase starting and may make the action current protection phenomenon). Via checking, machine total power switch to normaldistribution, but the real air switch (special line cutting machine) bad contact inside. For behind the switch to resume normal work, air switch, must according to the original phase sequence connection power, otherwise theerror action of broken wire and reversing device. Wire feed motor brake failure: check whether the capacitor is damaged. Press the stop button, the capacitor voltage should be IOOV. To further check the brake button isfailure, power failure probability is small.

Commutation failure: the case according to the stop button, the brake isfailure. The reason is the original reversing switch is a mercury switch, a mercury pipe position loose move, can lead to commutation failure;accordingly, the reversing is back to normal. If used for long, mercurygradually loss caused by commutation failure, you need to replace the. What need points out is: the fault of single board computer itself, including fault programmable interface chip, will cause the entire control system andpulse power supply can not vote in person. But this kind of fault from thesingle board display case can be found.