Re: [CAD_CAM_EDM_DRO] Minertia Servos on RF-31 mill?

Hi Jon,

Glad to hear someone has used these motors. I recall removing the
grooved Qume pulley many years ago on ONE motor, I used a hacksaw to get
it down as you said. Didn't have a way to use the Sherline mill to do
it. I now have an RF-31 mill, so that opens up some possibilities.
Turn the shaft down? Can I do that ON the motor? I have a Sears/EMCO
5" lathe. Might fit. I looked a little more at the Qume motors
w/encoders, And I should be able to get the encoder disk off (where did
I put my little spline wrenches?).

What resolution encoder would you recommend for these motors? Is 1024
OK? Yeah! my HEDS 6100's might finally have a home!

Alan KM6VV
P.S. Now to persuade the wife I need a pair of SERVO Gecko's. She just
found the bill for the second pair of G210A's. ;>)


Jon Elson wrote:

>
> Alan Marconett KM6VV wrote:
>
> > Hi to the list,
> >
> > I have been doing some "background thinking" on adding motors (stepper?
> > servo?) to my recently purchased RF-31 mill (happens every time I run
> > it, and have to crank the X axis back and forth). I happened to think
> > of the servos on the Daisy Wheel printers I have stashed in the garage,
> > and some similar ones I bought at an auction for robot projects, about
> > 12 or so years ago.
> >
> > I have half a dozen or so MinertiaMotor T06M-Qu12 21v, 1300 rpm, 61
> > oz/in servo motors, some used in daisy wheel printers. They are 3.25"
> > dia, by 3.25" long. The ones from the printers have an analog shaft
> > encoder, but not my new ones. I'd have to figure out a mount for them,
> > and the biggest problem would be to get the cable pulley off the motor
> > shaft (some kind of straight knurls), and a proper pulley installed. I
> > think they will make good servos.
>
> These are pretty good motors. I have used some Yaskawa proprietary
> motors from Qume daisy printers. I cut the pulley through one side
> with a broken-off hacksaw blade. (I may have milled most of the way
> down to the shaft first. I drove a large screwdriver into the slot, and
> the pulley came off rather easily. I adapted a standard encoder to the
> back.
>
> >
> > OF COURSE, I'll want Gecko G3xx drivers! Do I need to use a encoder to
> > initially drive them (just having a "power drive" of the X axis would be
> > a great help)? I have a pair HEDS 6100 shaft encoders, but they take
> > 1/4" shafts. How to mount them? Or how to interface the "analog"
> > encoders present on some of the motors? This project may take a while!
>
> You could turn the back shaft down to fit a HEDS encoder wheel.
>
> Jon
>
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