Welding aluminum parts by argon arc welding, I made a control cabinet, servo motor to drive the welding torch to move, and control welding current, control welding stop,There are 2 servo motors in the cabinet,.1 PLC. When I arc, the high frequency of the welding machine will affect my welding machine, and the servo motor will run around,PLC the first second inputs X1.X2 will flash. When the control panel is out of power, the welder will start arcing, and the alarm light on my Cabinet will flash (no power is on)The alarm beeps, too. Put awayA filter in front of my PLC with the servo driver, but the driver in front of hell no isolation transformer, alarm lamp in front of no isolation transformer, servo driver CN1 input port with no shielding line
When the arc is out, the high frequency of the welding machine will affect my welding machine, servo motor running around, this is obvious interference problems, check the grounding or add filter circuitOther phenomena are like interference,
1, do power isolation, control circuit power supply, servo motor power supply must go through the isolation transformer;2, at the same time, the input signal of the PLC (especially from the welder) must be isolated;3, PLC output to the welding machine parts have to be isolated by relay;4, select the appropriate PLC, design and installation wiring should be standardized.
In the encoder line with magnetic ring, PLC servo CN1 input screen mesh shield, and mesh shielded wire welded to the CN1 plug metal shell
