Re: OT-how to test and repair DC brushed motors.
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I was figuring that was probably the problem. It's been most of 50 years since I last played with the stuff. Been buying silicon carbide as much as possible since the 80's. Polished the commutators last night, and they look good. Now I need to find out how to check the armature without a growler. Going to try one of my DVM's on the high ohms scales. After I take a dive into the book I bought on fixing motors. Was published in 1920, so may have info on making a growler, or other methods of testing.?
Took me about 4 hours yesterday to find the Morse taper wedge I knew I had, and take the MT3 to MT2 sleeve off my MT2 ball bearing center, then about another hour to do the polishing. Just canceled my wife's dental appointment, as she woke up with a fever and sore throat, so may get to work on the brush holder caps today after all. And do the wiring checks and such, as well. I should manage to stay busy and productive all day. Maybe. ;)
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!
Expect in one hand, expectorate in the other. See which one gets full first.
On Wednesday, September 6, 2023 at 09:14:14 AM CDT, Jim Erdman via groups.io <jiminwis@...> wrote:
My recollection is that emery grit is conductive and you don't want any missed particles shorting out commutator segments.? Just my memory from working on old DC motors, wond turbines, and electric vehicles decades ago.?
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Bill in OKC too