Hey everyone. I'm new here, I've been watching these forums for a while now and finally have a reason to post. I have a 1969 Miller 320abp (S/N U516236) that I've been cleaning up and working on for a little while now and continue to have a weird issue. Every so often when welding in DC straight(DCEN) at the end of the weld when I take my foot off the pedal the HF seems to come on and won't turn off. Sometimes it only for a second, sometimes it's as long as post flow, and sometimes it doesn't stop till I turn HF switch from "start" to "off". Occasionally I have even turned the machine off and she continues to hum until there is finally a "clunk" and she is finally quiet. When this happens it screws up the end of my weld and is just generally disconcerting. I have both the contactor and amp control set to remote and have a working pedal. Start control is set to out. I'm on the middle detent in the amperage range dial.This happens with both my wp9 and wp20. I've tried it with amperage on standard and contactor on remote.. same behavior.
Any ideas?
-frank
kiwi2wheels
- kiwi2wheels
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Joined:Sun Feb 17, 2013 10:27 am