CAD CAM EDM DRO - Yahoo Group Archive

Minertia Servos on RF-31 mill?

on 2001-09-30 12:08:07 UTC
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.

The "new" motors have a label, "mini series" UGTMEM-06SFU13..... 50.0V
1.9A 82.2 (oz/in?).

One or two pair of motors still have the shaft encoders (with out broken
encoder wheels!), trouble is, they're what I would call "simple analog
encoders". That is, there is a LED, and a pair of sensors. No
conditioning logic (that was on one of the printer boards). Several
years ago, I had doc's for the Qume Daisy Wheel printers, and recall
some complicated logic; op amps and such. I'll look it up again, and
possibly steal some logic off the boards, but I'd rather find something
more current!

The new motors have what looks like a 1.812" dia by .812" aluminum
pulley glued onto a .443" shaft on the "drive side" of the motor. I say
glued, as I can see a little glue around the shaft/pulley interface, and
not the usual "tooth" look of the end of the "straight knurled drive
side" shafts of the printer motors. The "encoder side" of the motors
have a 9mm (.354") shaft, only .327" long; and 4 8-32 threaded holes in
the face of the motor, whereas the "drive side" has 4 10-32 threaded
holes. Could probably mount either way. I need to mount a "XL" series
pulley

Any thoughts on how to get the pulley off? I was thinking about making
up a plate to bolt onto the face of the pulley (there are three holes),
and using a screw to apply pressure to remove the pulley, while applying
heat. Ideas?

Anyone familiar with these motors, and are they worth the effort?

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!

Alan KM6VV

Discussion Thread

Alan Marconett KM6VV 2001-09-30 12:08:07 UTC Minertia Servos on RF-31 mill? Jon Elson 2001-09-30 15:09:06 UTC Re: [CAD_CAM_EDM_DRO] Minertia Servos on RF-31 mill? Ray 2001-10-01 06:00:25 UTC Re: Minertia Servos on RF-31 mill? Jon Elson 2001-10-01 10:29:26 UTC Re: [CAD_CAM_EDM_DRO] Re: Minertia Servos on RF-31 mill? Alan Marconett KM6VV 2001-10-01 10:56:22 UTC Re: [CAD_CAM_EDM_DRO] Minertia Servos on RF-31 mill? Alan Marconett KM6VV 2001-10-01 12:04:46 UTC Re: Minertia Servos on RF-31 mill? Jon Elson 2001-10-01 21:56:02 UTC Re: [CAD_CAM_EDM_DRO] Minertia Servos on RF-31 mill?