Coils Project Page 2

Some pics of self supporting coils that I have wound. These I did before I discovered the extra 4 laminations trick. Both of them ended up shorting out to the core material.

They still work for many things, but I won't use them in my pulse motors, due to unexpected results I get from them being shorted to the core material.

The baby one is 15AWG wire 60 turns. The big boy is 15AWG wire 400 turns. The big one is so powerful, I can't even think of pulling it off of a steel plate, when it's activated!

This coil has been completed, but I pushed the center lams (36 of them for a 1/2 x 1/2 inch square center) out a bit so that you could see the 4 extra that I speak of. The 4 extra lams provide the "box" that allows the core form to be pushed out and the real laminations to be pushed in behind the form. I use the simple things pictured here to do it and nothing more.

Here you see me tapping the core out as the 3 inch form goes in. Obviously I'm doing this only to show how to do it. In the real situation, you will be pushing the form out while tapping the laminations in.

Notice the hole in the laminations. I usually have a nut and bolt in there holding all 36 lams together tightly. It works well

I then remove the nut and bolt as I push the last bit of the laminations into the coil.

Notice the high-tech square hole in the plexi-glass? It's harder than it looks

heh... use 1/4 inch plexi. The other stuff is way too brittle.

Tapping it through is easy as pie with this setup. Use a soft rubber mallet.

Once you get it started, you can simply push it the rest of the way, on the table top, by flipping the mess over, and pushing on the coil CAREFULLY! Do not hurt your coil.

Tried to get a close up but you can not really see the lams well enough here

sorry!