马达电刷、电路开关、电器设备的连接点,特别是经常开合的切断开关,容易出现接触不良,产生火花放电故障。如不及时处理,就可能损坏设备影响生产。用手摸设备外壳,检查有无发热,可以找出故障所在。用这种原始的办法即使可 Motor brush, circuit switches, electrical equipment, the connection point, especially often open and close the cut-off switch, prone to poor contact, resulting in spark discharge failure. If not handled in time, it may damage the equipment affect the production. Touch the device shell, check for fever, you can find the fault. Even with this original approach