Why Cantex ?

Why Cantex ?

Their material is UV-stabilized for weathering strength in the changing climate of Northern Ohio. It also machines and drills consistently. The dielectric constant is the same from piece to piece, and the Cantex compound resists bending. I've filled a dumpster with look-alike parts that failed to survive the coiling process at some point.

See http://www.cantexinc.com for specifications.

The information presented here is accurate and true to the best of the author's knowledge. All recommendations and statements are made without guarantee on the part of the author. The author disclaims any liability in connection with the use of this information.

Thursday, October 8, 2015

A New Approach to Winding Aluminum Wire October 8th, 2015, rejected October 11, 2015

The tried-and-tested techniques used with stainless steel wire do not work with 5356 aluminum 1/16" wire.

The wire kinks and changes position on the coil form after it exits the guiding tool. Any small amount of slack is immediately translated into random wire movement. Back to the drawing board.
We'll start by eliminating the wire bending tool on the feeder stand. Tension on the wire is set by the spring-loaded brake in the wire spool spindle. So far so good. However, the black ABS glue pads that worked well for stainless steel have no effect on the soft aluminum. Time for a new approach.
 Here is a test piece with an end-to-end chalk line. This line is the guide for a new tool, the router.
Before routing, we need a tool guide to keep the router from wandering on the tube. Cantex makes a coupler, p/n 6141632, that's just right for riding the tube surface. Here the coupler is cut in half and the inside stop is ground off. The shell is fastened to the router base plate, and we're ready for action.

The router is set up with a 1/2 inch straight bit, and is set for a 7/64 inch deep cut. The theory is that the hard edges made by the router channel will slightly deform the aluminum and hold the coils in place.

The rice-like crumbs from the process fly everywhere ! Keep that ShopVac handy.

Four cuts are made on the tube, each at 90 degree intervals. Next, we roll !

Sunday, 10/11/15; The tensile strength of the wire is such that the grooves proved worthless.
On to plan C.

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