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RE: Coil Winder (fwd)
---------- Forwarded message ----------
Date: Sun, 10 Oct 1999 13:55:18 -0400
From: "Lau, Gary" <Gary.Lau-at-compaq-dot-com>
To: 'Tesla List' <tesla-at-pupman-dot-com>
Subject: RE: Coil Winder (fwd)
Easier than that, I just chucked a threaded rod going through the secondary
form into a hand drill, locked the trigger into the full-ON position, and
powered the drill through my variac. This allows complete control over the
speed and cost me nothing.
Gary Lau
Waltham, MA USA
From: "Dr. Resonance" <Dr.Resonance-at-next-wave-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Coil Winder (fwd)
It's easy to make your own. Buy a 15 RPM gear motor from a
surplus house
such as Nebraska Surplus or Fair Radio Sales (approx $25).
For endplates to couple to the motor use standard pipe
flange mountings
available from any plumbing shop or supply house. Most of
these have 4 bolt
hole patterns. Use 1/2 inch pipe (1/4 inch pipe for small
coils up to 4
inches dia) to form the vertical holder and some oversize
scrap bearing
blocks which attach to a pair of sawhorses. These form your
holder system.
They bolt up to a 3/4 inch circular piece of plywood which
form the winding
endplates for your coilform. Cut them for tight fit and tap
into the coil
form end with a mallet. We also usually drill 4 small holes
at 90 degree
spacing and tap in 4 small finishing nails to secure the
endplate to the
coilform. These are later removed and the holes drilled out
larger for
1/4-20NC nylon bolts which form the fastener system to
attach the finished
endplate to the coil after winding is completed.
Hook up a small control relay and surplus footpedal (allows
handfree control
of the motor) to the gearmotor and you are ready to wind
away. It's simple
and works on coilforms from 2 inches up to 24 inches in
diameter. The coil
is supported between the sawhorses for winding.
Dr. Resonance