Transformer based MIG Welders often use SCR’s (Silicon Controlled Rectifier) as the means of controlling the weld output current. An electronic circuit determines when, and for how long current is allowed to flow to the weld output terminals. This is accomplished by triggering the SCR’s with a PWM (Pulse Width Modulation) gating signal. The . . . → Read More: SCR Based Welder Repair
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There are thousands of Repair Centers throughout North America that Service and Repair Welders. This equipment is used by Hobbyists, Farmers, and Industry professionals for both Hand and Automation applications. The Welders can be generally classified as being Transformer based, Transformer based with SCR switching, Chopper or Inverter based. High end products such as . . . → Read More: Welder Repair – Equipment List The term OCV is an acronym for Open Circuit Voltage. It is the unloaded DC voltage that is present at the Weld output terminals of a Welder. This voltage normally averages between 60-90 VDC in STICK (SMAW) mode of operation. The one exception to this (where an AC voltage is present) occurs when dealing . . . → Read More: Welder Repair and the Importance of OCV |
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