Re: Should be OT: Motors... Back Gear Pin & Rattle
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The commutator on an armature gets turned when it's clogged with carbon or badly scored. The segments of the commutator are copper, and were once upon a time separated by mica insulators. These are newer, and don't seem to have the mica. They had a bit of carbon streaking, but weren't scored all that badly. They did quit working, and I was able to find new brushes the old ones appear to be a bit to short to make reliable contact. The whole lift has been sitting for at least 15 years, so might also have some corrosion problems since the shed they were in is not weather proof, nor necessarily water tight. But it worked for several months before the problem appeared.? I've been working on it as needed for fear that it would get disassembled and left in pieces like so many of my other projects have been. It took nearly two years for the Atlas TH42 to get the wiring redone AFTER I had all the parts and wire, and everything apart, since I kept getting distracted by other things. Trying to NOT let that sort of thing happen with this lift, as I need it to keep me from having to lift her 240lb power chair into the car... My back hates me every time I even THINK about doing that again. ;) Bill in OKC William R. Meyers, MSgt, USAF(Ret.) Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY! Physics doesn't care about your schedule. The only reason I know anything is because I've done it wrong enough times to START to know better. Expect in one hand, expectorate in the other. See which one gets full first.
On Wednesday, September 6, 2023 at 11:27:50 AM CDT, Andrei <calciu1@...> wrote:
Is there a reason for turning the armature (clearly i have no idea about motors?)?
From: [email protected] <[email protected]> on behalf of rfmarchi1 <rfmarchi@...>
Sent: Wednesday, September 6, 2023 12:23 PM To: [email protected] <[email protected]> Subject: Re: [atlas-craftsman IO] Back Gear Pin & Rattle ?
Two hints on this topic. If you use an abrasive cloth like emery of rouge paper, be sure to thoroughly clean the surface when you¡¯re finished. They contain some kind of binder wax that doesn¡¯t get along well with electric current and heat. If you do try to turn the armature be aware that turning copper requires a sharp tool and a negative rake. If the tool is not sharp it will mush the copper. If the rake is not negative (about 5 degrees in my experience) it will dig in. ? Sent from for Windows ? |
Bill in OKC too