On Sat, 17 Jan 2015 10:25:17 -0500, "Jim Wilkins"
wrote:

"Larry Jaques" wrote in message
.. .
On Sat, 17 Jan 2015 05:25:14 -0800 (PST),
wrote:

On Saturday, August 30, 1997 at 3:00:00 AM UTC-4, mlightner wrote:
I recently acquired a DC welder with the name H C Scott Industries
on it
- it has what looks like a car alternator mounted inside an 8" x
8" x12"
frame, and has an outlet for
plugging power tools into125VDC, (rated at 12 amps). The welder
portion
of it consists
of two terminals for the leads and a dial that selects from 35 to
135
amps. I had no luck
finding the manufacturer of it, though there is an address still
readable (a po box in New Mexico) on the housing.

Has anyone out there had any experience with one of these? The
unit
didn't come with
a motor, and has a few wires I need to ID, but all the diodes seem
to
read ok. The bearings also seem allright, does anyone out there
have
any suggestions (or better yet
technical literature on it) as to rpm or hp needed to run it?

Hi, Josh. I, too, had one of those follow me home from Gunner's
recently, but I haven't had time to do any research on it yet.
As well as all the questions you asked, I wish to find out what
devices will safely plug into 125vdc in addition to 120vac.
I'm wondering if a lawn mower engine might power it, but also
wondered
how much torque it would require, thinking about bicycle power to
run
it off-grid sans-fuel.

http://www.epi-eng.com/piston_engine...and_torque.htm
http://bikecalculator.com/veloUS.html
15 MPH. = 100 W
1 HP = 746 W

Yabbut, how much will Snag's old lady produce? And what are the RPM
and torque figures required to produce x watts on a li'l Scott jobber?
You didn't even _half_ do my homework for me. Shameful.

BTW, I figured it would be a quick battery charger, but I'll have to
see the voltage output to confirm. Work has been semi-steady so far,
so I haven't gotten to the "Research and Projects Only" stage of the
work year as yet. I guess I'll have to break down and buy a digital
non-contact tachometer, too. $10.51 isn't bad, though.

--
Progress is the product of human agency. Things get better because
we make them better. Things go wrong when we get too comfortable,
when we fail to take risks or seize opportunities.
-- Susan Rice