Advice needed for finding high torque 24VDC servo motor

If you actually mean 100 in-lbs, that is 1200 foot-lbs. That is hella torque. Or do you mean oz-in.

When you say servo, do you mean R/C servo with integrated gearbox? Or do you actually mean a DC servo motor capable of this torque.

If you mean R/C and you mean 100 oz-in, try Vantec

Incorrect math blueeyedpop. We would like 10 ft-lbs (120 in-lbs) or somewhere in that magnitude range. This would be the real industrial control type servo motor, not r/c.

oops late night there, like 3:30 am late anyhow, the issue comes down to the power of the motor. Running lower volts means more amps to get the same watts. This is undesirable. I think this is why cars are migrating toward higher bus voltages as well.

a look at that motor, look at the current for the 24V vs the 180V versions.

The 700 Watt version runs 24V, 330A or 180V, 41A

Thanks very much blueyedpop. Is there a brushless servo motor with a high resolution encoder with similar specs?

Thanks ~ DD

If you run a 75V motor at 24V you will get 1/3 the speed but the torque would be the same.

I haven't heard of any DC motors that work that way. When you lower the voltage you lower the torque and the speed.

-- D. Jay Newman

You're talking real money here. High torque brushless servo motors, especially not at 120 or 220 volts AC, are a high-end automation application. I think you'll want to talk with an application engineer at a motor company, say like Baldor.

These things by nature have an encoder built in. You can select the resolution based on your application. Voltage can be specified when ordering.

-- Gordon

DD wrote:

I got some nice 24VDC gearhead servo motors from Herbach and Rademan that look like they meet your specs. Unfortunately, Herbach and Rademan seem to have "upgraded" their website and now all (most) of their catalog links appear to be broken so I can't point you to a URL. They were around $65 each.

I can point you to photos of my rover where they are used though:

The actual motors are:

Matsushita Electric Industrial GMX-8MC045A

The gearhead provides a 45.5:1 reduction, though I forget the actual RPM - less than 100. The built-in quadrature encoder generates 4550 pulses per phase per 1 revolution of the output shaft which provides excellent feedback of my rover's motion anyway.

-Brian

My mistake - the Herbach and Rademan site is working just fine if you go to

instead of The latter appears to be an older and broken version of the site. The former works fine. Here's the link to the motors:

Or if that link is too long, here it is in tinyurl form:

These are very nice motors and work great. Like I mentioned, I use them on my rover:

-Brian