User:Brian P. Josey/Notebook/2011/01/27
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Before I went on vacation, I created a frame for my electromagnet using Lego pieces and O-rings. With their small size and ease of use, the Lego pieces created a great frame, while the O-rings would keep the wires from slipping. To make the magnet work, I need to wire it today. Before I do, however, I measured the dimensions of my frame for reference:
I can use these measurements later when I model the magnet in FEMM.
After taking the measurements, I slowly began to wrap the cross pieces with the O-rings in wire. On the side with the large gap between the rings, I started with a 2.5 feet length of wire sticking out. This piece of wire is left over to connect to the current supply. Slowly, I wrapped the wire around the Lego piece, watching for any splits or twisting in the wire. Eventually, I wrapped the piece with 325 turns of wire. I then wrapped the connecting piece to work to the other side of the magnet. I then carefully wrapped around the second wire holder, taking care to ensure I was going the same direction around as in the first case. Eventually ending with only 25 turns of the wire on this half. I then measured the thickness of the wire both in length and width for modeling:
All three of these measurements were made on the 325 turn side.