Exploring Resistance Welding Controllers need & selection.
Exploring #Resistance WeldingControllers need & selection. Welding controller is vital part of modern resistance welding machines. Old controllers have only a time controlling power relay to supply welding current for a particular time and the weld current is adjusted by rotary switch. Modern resistance welding controllers have many function. Now timers are lines synchronized to prevent excess spark on work piece and saturation of power transformer for an electricity supply cycle. Along with squeeze, weld & hold times the off time is added to repeat welding cycle to weld wire mesh or fast repeated welds. In more advanced controllers some more timers are provided like up-slope, down-slope, weld1, weld2, weld3, hold1, hold2 and hold3 etc. and a programmable relay output is provided to synchronized operation with external automation components. Top models also have secondary feedback circuit to make perfect and same weld results on every welding par
