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Bit of a long shot here. I have a 2018 model AlphaTig 200x. Haven't touched it in over a year because I moved and just haven't gotten to getting the garage setup yet. I pulled it out today and it no longer will work in foot pedal mode. I've confirmed the pedal plug pins all do what they should (1+2 close and open with the microswitch, 3,4,5 appropriately sweep from 0-10kohm, and 6 is shorted to 7). I've also pulled the cover and confirmed that 6+7 do close and open at the point where they connect to the front panel as you connect and remove the pedal switch. No obvious broken wires or unplugged cables inside the welder. Literally every other feature works on the machine. It does pulse, AC, DC, 4t and 2t finger switch. I just cannot get it to acknowledge a foot pedal anymore. I'm out of warranty now, so not sure I can get support from AHP. Anyone else ever see this happen? Any ideas what to poke at? I haven't yet pulled the front panel to inspect, figured I'd ask around first.
Reply:Update just in case anyone ever searches on a similar issue. It appears that the way the welder detects and uses a pedal is through pins 6+7 on the connector. Those are shorted together and when the pedal is connected they close the coil on a relay on the front PCB. That relay presumably changes some settings, lights the LED, and tells the welder to use the potentiometer in the pedal. It appears this relay died on my board. I pulled it off and no amount of voltage on the coil pins will actuate it. I have new ones arriving today and I'll report back if this solves the problem or if something else failed on the board which caused this relay to fail. |
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发表于 2022-5-19 11:02:43