Re: Sizing servo motors for BP size mill

Jon,

If memory serves me, virtually all B-port sized factory-made CNC's
use either a 19 or 40 in-lb motor. For some reason those seem to be
the standard sizes.

Servo Dynamics sells motors very reasonably, not surplus prices by
far, though. But much less than I've found anywhere else. I believe
they're around $700 for a 40 in-lb type.

A couple times I've searched for low cost servos. Most everyone is
stuck in the $800 to $1000 price range for the 40 in-lb'ers. Even
guys with rebuilt motors. I guess they know they've got a captive
market. When your machine is down you pay the going rate just to get
back up and running.

Doug

--- In CAD_CAM_EDM_DRO@y..., Jon Anderson <janders@n...> wrote:
> Jon,
>
> Yeah, I figured out the difference in motor specs pretty quick just
> looking at numbers. There's a SoCal outfit selling a PC based
retrofit
> (http://www.cnc-in-a-box.com/) and offer two motors, 19 and 29
in/lb.
> Don't know if these are direct or belt drive. But it's trying to pin
> down a rating such as this that I'm after. I am assuming these are
the
> continuous rating...
> I was told of a resource for surplus motion control stuff that is
pretty
> reasonable and am hoping I can talk this person into picking up
three
> motors for me, but I would need to give him the specs to look for.
Yes,
> if this source pans out and produces, I'll post the info, but I can
say
> up front they have no catalog nor web site. Strictly, you-pick, you-
pay,
> in person. :(
>
> Jon A