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Old 18th Feb 2018, 7:26 pm   #10
David G4EBT
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Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,737
Default Re: Coil Winder Any Info Would Help (See Pic)

On Karl's cleaned up picture it's apparent that just inboard from the pulley/handle on the left-hand side, there's a small disk at right angles to a larger disc. It's my guess that together, they govern the 'gearing' of the rate at which the coil former shaft rotates. Together with the cam mechanism which shunts the wire feed back and forth, that determines how many 'waves' occur per revolution. If the smaller disc is moved closer to the centre of the larger disc, there will be more waves per rev, and if moved towards the outer edge of the larger disc, there will be fewer waves per rev. I’ve annotated your pic to highlight what I mean by the two discs.

I built one of the ‘Morris Gingery’ hand wave-winders from the Lindsay book, as can be seen working at the youtube video at this link. From the 2 minutes 20 secs point, the friction drive with the two discs at right angles to each other can be seen at the right hand side of the winder at the top of the picture:

https://www.youtube.com/watch?v=FIOocMoRsYQ

In that design, the coil rotates in a fixed position on the shaft, and the wire is guided back and forth. The second pic below shows the two-disc drive of my winder. The rubber drive wheel can be moved towards the centre of the 'friction disc' or towards its outer edge to adjust the rate of ‘waves per rev’. It could be that in your winder, the wire guide/tensioner (which seems not to be present) are ordinarily in a fixed position, but the coil drive shaft moves the coil firmer back and forth as turns are laid down. I say that because to the right hand end of the coil drive shaft, there’s a tensioning spring of some sort which infers that the coil shaft moves back and forth - not the wire guide.

I guess that one way to help solve the conundrum would be to turn the handle a few times and see that happens!

Good to see that your winder has a turns counter.

The Morris Gingery one used a 'tally counter' ('clicker') but I didn't find that satisfactory. Instead, I used a pocket calculator operated by a microswitch and cam, with the switch wired across the contacts of = button. If you enter '1' on a calculator, then press the '+' button twice, '1' becomes a constant.('K' on the display). Thereafter, with each press of the '=' button' the calculator will count up from 1. Neat idea eh? Well yes, except that like most calculators these days, it's auto shut-off so when the winding is completed, you need to save the turns counted in the memory before it switches off. (As I soon discovered!).

Hope that helps a bit.
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