Gallery, Projects and General > How do I??
Armature rewinding
PekkaNF:
That looks really nice.
How did you reverse engineer it?
Did you found instruction book in PDF or something to help?
Good work!
John Rudd:
PekkaNF,
Reverse engineering was difficult but not insurmountable....
First, determine number of slots in armature, count number of segments in commutator....
Then cut off the rounded ends of the windings...punch out the wire in between the slots, put to one side at least 3 sets.....
Clean everything up.
To the wires, count the number of wires in the 'clump'.... Then take an individual wire and carefully measure its diameter....
Now we know how many turns per 'coil' and wire gauge....
If the commutator is removed, ensure its position is noted relative to rhe comm stack....look at the slot and the segment relationship.....
To be honest, I watched various Youtube videos and trawled the internet for bits of information before embarking on the winding..,,,
hermetic:
Well done that man!! if you need to reverse this type of universal motor, you can do it by swapping the brush connections around. not easy because they are usually just the right length to reach the brush holders. Best of luck with the final rewind!
Phil
John Rudd:
Phil,
You are correct, swapping the brush wires over does the trick.....
But, yes they are a fixed length lead.....
I'd rather not do this as it then means that things are not 'original'... The armature is from a vintage Stanley Bridges drill I'm restoring..
Sea.dog:
Nicely done John. I'll send you mine when you have time :D (Just kidding :thumbup:)
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