Re: any interest in power xfmrs?

Multi-Volti Devices wrote:

> 5) I missed out on Les Watts' (I just realized the electrical pun there!)
> NEMA 42 motor sale. Any used or surplus BIG 3-stack NEMA 34 or 2-3 Stack
> NEMA bipolar/2-phase NEMA 42 steppers available among the group, or any
> surplus references? I want to know what one will cost (I know what they are
> new...ugh) when I get that far in the project.

Ha! I get that pun a lot! In fact my most successful invention at work hereis the self-regulating polymer auto side mirror
heater. And it really
does use "less watts"!

My guess on the high voltage drives (like the ones I had) is that current
can be controlled even with lots of reactance. A good current source
must have high voltage capability since voltage is floated to maintain
a current value.

>
>
> 6) I, in some demented state, purchased several thousand excess inventory
> Heath (kit) power transformers with the goal of heroically saving them form
> a landfill and cataloging and inventorying them on the Internet.--

Hmm... that's 20v x 1.414 minus a couple of diode drops = 27vdc or so. As longas they are not autotransformers the secondaries
could be put 3 in series
or series /parallel to make a nice big 90v servo supply. They would also
be great for audio amp builders. I do that some and the 10 amp 100 volt
transformer I used on the last design cost some $$$.

I am desperately hunting for a deal on servomotors and will keep a lookout
for more big steppers for you as well.

Sorry for the late post.

Les

Leslie M.Watts
Illinois Tool Works
Corporate Advanced Technology group
(847) 657-4559
http://www.netcom.com/~leswatts/leswp.html