. Here's a picture of the collector ring and pieces of standoff insulators:
I embezzled the collector ring assembly from my other T-Bolt for the time being, and have installed it in the 1000T single-phase, and it's working fine now!
As best I can tell, three of the 4 bolts holding the collector ring assembly into the standpipe, had backed out over time, and the rings fell crooked. This allowed one of the brushes to catch between the rings, and torqued the whole arse'y to rip the wires off the rings (luckily, or I'd have had a 50-amp short, which easily could have done some unwelcome welding inside the chopper housing! ).
Moral of the story: Check your collector ring bolts!
I haven't checked to see if Fed Sig has those parts anymore, and if not, I'll put an ad on our wanted section, and/or have a machinist I know, make some standoffs out of Lucite and maybe a set of rings, if these can't be straightened out perfectly. They're warped pretty badly.
Charles
