Model family
MIG / MAG / CO2 Welders
A WelderData model-family hub for gas-shielded wire-feed welders, including CO2/MAG constant-voltage machines, NBC/NB style platforms, KR-style control logic and wire-feeder fault routing.
Database summary
MIG, MAG and CO2 welders combine a welding power source with a wire-feed system, torch trigger circuit, gas solenoid and control board. A visible fault may appear as no wire feed, no gas, unstable arc, no voltage, crater-fill failure or abnormal stop, but the cause may be in the feeder harness, control board, voltage-control circuit, power-source output or protection path.
WelderData treats these machines as a control system rather than as a simple motor fault. Wire-feed speed influences welding current trend, voltage setting controls arc voltage, and the torch command coordinates gas, contactor, feeder motor and stop sequence.
WelderData control map
Control areas to separate
| Area | What it controls | Typical evidence |
|---|---|---|
| Torch trigger / command line | Start request, gas command, feeder enable and power-source enable | No response, no gas, no motor, or intermittent start. |
| Gas solenoid circuit | Shielding gas before and during welding | Gas always on, no gas, or gas works but no arc output. |
| Wire-feed motor control | Wire speed and therefore welding-current tendency | Motor not running, speed fixed, speed surging, or no jog. |
| Voltage control section | Power-source output voltage and arc length behavior | Voltage maximum, minimum, unstable, or not adjustable. |
| Crater / burn-back / stop sequence | End-of-weld wire and voltage timing | Wire sticks, burn-back abnormal, crater-fill does not work. |
Repair routing principle
Do not diagnose a MIG/MAG welder from the wire feeder alone. If the motor runs but there is no arc, check the contactor/power-source enable and output voltage. If gas works but the motor does not run, separate motor supply, drive transistor/thyristor path and feeder harness. If voltage and current remain at maximum or cannot be adjusted, inspect the remote/internal selection path and the analog command lines before replacing the main power devices.
Related WelderData pages
Pulse MIG / MAG extension
Pulse MIG/MAG machines add a waveform-control layer above the ordinary wire-feed and voltage-control system. Use the pulse pages when base MIG functions are present but peak/base current, pulse frequency or duty behavior is wrong.