Magneto Remagnetiser--Coil Winding

Thick wire, piece of cake.

It's useful to shape the former first to round off the corners. You can do this with a file, or just by putting a few wraps of tape on there first. Winding cylindrical coils is easy, squares and rectangles are much harder, unless you have a real coil winder with a cam control that can pay out the slack as the former rotates.

You probably do need to make a tension control though. This is a simple bracket for your wire reel along with a friction device to control the feed. The usual thing is a spring-loaded "cable grip" made from a couple of bits of thick polypropylene held together by two thumbscrews with springs over them. Tighten them up from slack until the wire stops flailing about and the reel over-running.

86 doesn't seem like a lot... I think I'd look at rigging something hand- powered up, to be honest.

80 odd turns is easily do-able by hand, its when your in the thousands u need a coil winder;!..

Thanks everyone for the encouraging replies, reckon the next thing to do is to order some wire and get started. I have a turns counter I rigged up for my lathe so might as well use that, as everyone says 86 turns is not to many turns.

How slow can your lathe go and how quick does it start/stop when going slowly? 2.36 dia wire quite hefty and will need some effort to form onto the former and keep there.

86 turns, 2.36 dia wire, 80 mm long, 3 layers?

We wind 3 or four strands of 2.36mm by hand on 750 size bobbins side by side with no real problems. It is slightly springy but not too difficult to handle.

3mm is the largest we wind by hand before going on to rectangular strip.

I have sorted some wire out for the OP.

Peter

-- Peter A Forbes Prepair Ltd, Rushden, UK snipped-for-privacy@prepair.co.uk

By hand it would be easy but trying to feed on and form something that size at more than, at a guess, 20rpm, might be interesting. Particulary if it takes a few revs to stop.