Rewinding a motor stator
"N Cook" wrote in message
...
N Cook wrote in message
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Got a bit tired of electronics and as my old hand drill, i only use for
counter-clockwise left-hand drilling, is playing up so I decided to give
it
a birthday present of a new coil. It was supposed to be for 240V but
running
off 110V via a variac was ok for my purposes, but now the part-bad coil
was
causing too much variation and excess current/contact arcing for the
ammeter
on the variac.
I removed the relatively blackened coil , that putting a meter over that
coil , in use, confirmed bad in comparison to the other. Cut through the
hank and counted turns , weighed the copper to .2 gm and measured the
wire
diameter so I know how many turns and a good idea of the average
diameter.
Does anyone know a formula for a better guide for setting up a 2-part
former
( for removal) with the right dimensions, to wind a replacement before
squashing and placing in the channels with paper from an old high voltage
capacitor and then swathing in lacquer. Would laying a length of rubber
cord
around the placement area inside the motor be a better idea for getting
the
winding former dimensions. any other tips ?
found a useful table in a 70 year old book.
Wire qauges one way and columns of wires per sq in packing, weight per 100
yards and ohms per 1000 yds. So the former dimensions are determined
--
That's pretty cool, I've toyed with the idea of rewinding a motor like that
just for fun but never actually done it.
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