Your digital winder pretty much eliminates the need for a low angular
momentum reel. Our winder uses an old ice cream freezer motor with a foot
switch as a speed control. I guess you'd call it an analog winder. The
stretchy sleeve around the spool generates a little tension, and the feed
onto the coil has felt pads to feed it on with significant tension. We wind
a bifilar winding with nylon monofilament of the same diameter as the wire
(#26) to reduce interturn capacitance and increase insulation. We have
wound coils 12" dia x 30' long with no problems.
The professional winder needed the low angular momentum since it stopped and
started many times on each coil.
---Carl
-----Original Message-----
From: krux@xxxxxxxxxx
Sent: Wednesday, January 29, 2014 12:22 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Tesla Coil Winder
Very nice winder! Many professional winders pull the wire off the end of
the
spool to avoid the large angular momentum of the rotating spool. That
way, if
you have to stop the spool doesn't keep turning and make a big tangle or
kinks, and doesn't break the wire when you start it. This only works for
wire
sizes around 20 and smaller. It works better if you put a sleeve made
from an
old pair of sweatpants around the spool to provide a little friction. It
should extend about three inches above the spool. I worked in a plant
where
we wound TV flyback xfmrs with #39 wire (just barely visible) and this was
the
scheme our winders used.
I hadn't thought of doing that. I would think that you would tend to get
kinks in the wire as it twists around, but I suppose that wouldn't be too
hard to prevent.
Like I mentioned in my last post, I kind of designed the spool holder off my
wire feed MIG welder, where it has a spring under tension to prevent the
spool
from running away. I also accelerate and decelerate in code, so there are
no
sudden changes in momentum.
perl -e 's==UBER?=+y[:-o]}(;->\n{q-yp-y+k}?print:??;-p#)'
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