Circuit
SAW CV / CC Voltage and Current Feedback Control
A WelderData circuit reference for distinguishing constant-voltage response, constant-current response and feedback-loop faults in submerged arc welding power-source variants.
Database summary
Submerged arc welders may use flat, drooping or process-specific output characteristics depending on the welding source and controller arrangement. In a constant-voltage arrangement, wire-feed behavior and arc voltage interact strongly. In a constant-current or drooping arrangement, output-current regulation and command response become the main evidence.
For repair work, the important point is not the label on the front panel. The technician should confirm which signal is actually being regulated: arc voltage, welding current, a current-feedback sensor, a shunt signal, or a processed command from the tractor/controller. This page records the WelderData routing logic for that separation.
WelderData feedback routing map
Repair routing table
| Observed behavior | Likely section to separate | Next evidence |
|---|---|---|
| Wire feed hunts or repeatedly corrects during welding | Arc-voltage feedback or CV response path | Measure arc-voltage sampling and compare with commanded voltage |
| Welding current does not follow setting | Current feedback or source regulator | Check current sensor, shunt, command input and output response |
| Source enables but arc is unstable | Power-source output characteristic or feedback mismatch | Confirm CV/CC mode and source-interface wiring |
| Controller settings change but source output does not | Interface or source-enable fault | Trace command line, relay/contact enable and feedback return |
| Output exists but displayed value is misleading | Display/feedback scaling issue | Verify with external current or voltage measurement |