Re: [CAD_CAM_EDM_DRO] Electrocraft Motor Specs

On Tue, 19 Aug 2003, Erie Patsellis wrote:

> Since everyone has their EC catalogs out, does anyone have specs on an
> electrocraft E712 motor, part # 712-015-0774?

Yes! I have exactly those motors (well not technically mine, but I'm
helping a friend with the electricals for an older Wells Index refit, and
he picked up these motors on ebay).
Anyway, here's what I have:

37.51 oz-in/A (Kt)
25.0 - 30.5 V/kRPM (Kv)
Terminal resistance 0.75 - 1.02 Ohms @ 4A
Max terminal voltage 60V
Max continuous speed 2100RPM
Max peak torque 1500 oz-in
Max peak current 44.5A (unsure)
Max continuous stall torque at maximum motor temp 300oz-in
Max continuous current 8.9A

The seller didn't send a spec sheet with the motors, but he said these
were the specs he was given when he purchased the motors originally. He
said the scan was blurry for the peak current number but he thought 44.5
was correct. Since I haven't seen an original spec sheet for these I
can't confirm the numbers, but I did connect the motor to a variable power
supply to check the Kv, and I got about 29V @ 1000rpm, which is right in
range. I can also say that these motors have some serious torque.
So I would say the specs are probably accurate.

C|