Post by dave632 on Feb 28, 2020 18:37:12 GMT -7
Decided to finally try a rewind on an old burnt up pancake armature.
First I removed all the old windings.
Motor winding 1
Then I got out the crazy machine I built about a year ago. It uses a motorized driveshaft to turn the arm and is supposed to count the turns with a counter.
These arms are a real pain to wind as you have to remove the commutator then clamp it back in hoping that the windings are not to fat. Tough to do.
MW 2
The counter did not work well but the rest worked fairly well and I could wind a segment pretty quickly. Had to start guessing about turns since the
counter kept missing count. Turned out pretty well as the arm was between 1.5 and 1.6 ohms using # 34 or .006 wire with about 140-150 turns.
MW 7
The arm ended up looking like a stock mean green.
MW 6
MW 3
Put it on the track for a test and it ran backwards as I forgot to wind the coils in the correct direction.
I reversed the magnets and it immediately tore up the crown gear.
MW 4
Put a new crown gear in it and it ran better. The 60' is not good since it has stock magnets in it and in this case it needs stronger ones. I might give
some polys a try which would help the ET a lot and the speed should come up some to but it will probably kill the crown.
Some of my stock 14 ohm arms can hit 60' as good as this.
MW 8
I plan on rewinding an inline soon as they are a lot easier than a pancake.
First I removed all the old windings.
Motor winding 1Then I got out the crazy machine I built about a year ago. It uses a motorized driveshaft to turn the arm and is supposed to count the turns with a counter.
These arms are a real pain to wind as you have to remove the commutator then clamp it back in hoping that the windings are not to fat. Tough to do.
MW 2The counter did not work well but the rest worked fairly well and I could wind a segment pretty quickly. Had to start guessing about turns since the
counter kept missing count. Turned out pretty well as the arm was between 1.5 and 1.6 ohms using # 34 or .006 wire with about 140-150 turns.
MW 7The arm ended up looking like a stock mean green.
MW 6MW 3Put it on the track for a test and it ran backwards as I forgot to wind the coils in the correct direction.
I reversed the magnets and it immediately tore up the crown gear.
MW 4Put a new crown gear in it and it ran better. The 60' is not good since it has stock magnets in it and in this case it needs stronger ones. I might give
some polys a try which would help the ET a lot and the speed should come up some to but it will probably kill the crown.
Some of my stock 14 ohm arms can hit 60' as good as this.
MW 8I plan on rewinding an inline soon as they are a lot easier than a pancake.
