Re: [TCML] Envirotex Lite , High Torque drive

[Steve Ward <steve.ward@xxxxxxxxx>]

Jim,

For what its worth, i recently coated a 12.75" x 47" winding with 32 oz (2
coats at 16oz each) of envirotex to get what i consider a suitably thick
coating.  The coating is thick enough to prevent damage in the event of
flash-over.  I use a normal coat of poly-urethane varnish on the wire itself
so that its firmly held in place with the thin varnish that will wick into
and under the windings.  The epoxy will NOT do a good job at wicking into
the coil, and is really just a surface coating.  Before application of
epoxy, be sure to wipe down the whole coil with an alcohol-saturated rag.

So you better go for the gallon kit, probably putting on 20-24oz per layer.
I do 2 thinner layers rather than 1 really thick one usually.  I use a metal
spatula thing i bought at home depot, i think its for drywall mudding, and
is about 5" wide.  Just keep the coil rotating SLOWLY (maybe 20-30 RPM) and
keep pouring it on ahead of the spatula to spread it out.  With the right
touch you can really get some seriously thick layers on the coil if the spin
rate and application technique is just right.

Another tip, despite what they tell you, i use a low speed drill and a
home-made mixing attachment to stir up my epoxy.  The mixer is just a bent
up piece of wire (im sure you can figure something out).  I dont suggest a
paddle or anything for a drill-powered mixer.  Anyway, you will see the
epoxy mix turn cloudy, keep mixing and it will return to a very clear
appearance, this is good!!  Hand stirring often left my mix a bit on the
cloudy side, while it still cured clear it seemed to take an extra long time
to set.  A thorough mixing to the clear stage seems to be the better way.

Steve

On Sun, Jul 26, 2009 at 6:43 PM, Jim Mora <wavetuner@xxxxxxxxx> wrote:

> Hi All,
>
>
>
> Thanks much for the shared experiences on "Pupman" on Envirotex Lite
> application.
>
>
>
> I recognized the how fast a high torque drive could go from my friend to my
> worst enemy. Luckily, my motor drive has a provision for about every
> interface including a PC and Ethernet!
>
>
>
> Also, it has provision for an external emergency stop and an external
> potentiometer speed control. I bought a cheap guitar pedal and gutted the
> China audio taper electronics and added a 2K linear potentiometer for speed
> control. It was necessary to mod the throw to get better pot circulation-
> anyone know where to get a half turn pot??? Nothing comes up with Google.
> I'll put a mushroom stop button in a die cast foot stomp box.
>
>
>
> A couple of questions though:
>
>
>
> I want to buy Envirotex LITE correct?
>
> Any idea how much to mix for a first coat a 12.25"  x 61.25" #18.
>
> I buy wholesale from a local paint store; so, a gallon may be a good thing
> if available rather than buying in quarts?
>
>
>
> I look forward to a glass like coil rather than my thin-ish poly coated
> coils.
>
>
>
> Thanks Much,
>
> Jim Mora
>
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>
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