Treadmill Motors as Servos - DC Motor Controller –

John (kz1927), Leslie, John Hansford, and Jesse Brennan – thanks for
your inputs. Your question – "what are you going to use the motor
for" is very important. I intend to use it for learning about dc
motors. I've been studying / searching dc motors for over a year by
reading web posts on various Yahoo Groups. But I am so far behind
most of the posts that I don't understand what they are talking
about, or I can't seem to make the connection between what I
understand and a practical working application.

Let me get specific. I studied / searched dc motors and their
controllers for a high speed engraving spindle application (greater
than 15,000 rpm, and 100 watts minimum) for my SIEG X2 CNC mill.
Impossible – the technology of brushless dc motors and their
controllers are way too complicated. So I backed off to brushed dc
motors and their controllers. Not that simple either. So I settled
for the KDNTool solution – the Proxxon IB/E Professional Grinder. I
want to engrave and sculpt plastic, brass, steel, and wood.

But I still don't know anything practical about building a dc motor
and controller system. I can't even match a commercial dc motor
with a controller, for a specific application. So I decided to do
something simple and practical to enable learning. Fix my broken
treadmill. I feel that if I can do that then I can move on to
something more challenging in CNC.

Thanks for the Surplus Center information for their item# 10-1783.
Argord Corp permanent magnet motor, 1.2 amps at 95 VDC unloaded.
John Hansford – is the Surplus Center item# 11-2269 controller,
90/180 VDC speed controller w/pot compatible with the motor? Does
the controller plug into 120 VAC, or do I need to purchase something
to go between the 120 VAC supply and the controller?

Here are some of the things I've learned / found about dc motors,
servos which may be useful to you guys. Jesse Brennan, I'll look
into the Bodine motor web site.

Electric Motors by Brian Molder, this is a five part series – click
on Articles from Southeasters, then select each of the five Electric
Motors articles.
http://www.southernsoaringclub.org.za/

Intro to PID
http://www.thekeeser.com/Electronics%20info/intro_to_pid.htm

A technical guide to building fighting robots – click on DC motors
http://homepages.which.net/~paul.hills/index.html

The Gizmologist's Lair
http://www.gizmology.net/motors.htm

Beginners' Guide - Electric Motors
http://adamone.rchomepage.com/guide5.htm

Thanks for your help, and God bless you all.

Bill Perun