Coil Winding Device

1. Coil Winding Device There are many good ways to wrap insulated solid copper wire tightly enough to make a good coil. I wrapped 4 coils with the device I made and of course the fourth one is better than the first. I decided that I needed firm sides on the form I would wrap the wire upon. That decision eliminated anything that would flex with pressure so I used �� thick (actually .707 inches thick and not .75 inches) birch plywood. A series of pictures illustrating the making of the winding device are on the next slides. The first step was to use a compass to draw a 6 inch diameter circle on the birch plywood. A nine inch circle was drawn using the same center point as for the 6 inch circle. This resulted in two concentric circles. I drew a line across the largest circle and then drew lines 15 degrees apart (I used a plastic protractor) from the center of both circles out to the six inch circle. Thirty 3/8 inch holes would be drilled at these15 degree intervals along the inside of the 6 inch circle. It is necessary to only draw the circles and lines on one of the plywood pieces since they will be taped together so the drilling of holes results in two identical pieces.

2. I used a band saw to cut out the circles (you cut on the outside of the line of the 9 inch circle).