Re: [CAD_CAM_EDM_DRO] Taig retrofit servo motors

Thanks for the info Dan,

I just looked at your servo motors, nice deal! The US Digital site is a
good resource.

Alan KM6VV

Dan Mauch wrote:

>
> The heds6200 is quite a bit different from the heds 5500 series that uses a
> .850 pitch diameter pattern so the answer is not even close to having the
> same method for adding them.
> I have been buying mine from www.usdigital.com and FAI but FAI is out of
> them.
> Dan
> -----Original Message-----
> From: Alan Marconett KM6VV <KM6VV@...>
> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
> Date: Friday, January 12, 2001 12:03 PM
> Subject: Re: [CAD_CAM_EDM_DRO] Taig retrofit servo motors
>
> >Dan,
> >
> >Is that encoder mounting technique useable on the HP HEDS 6200? Two
> >holes at 1.811" ring circle. Also, what's your source for the HEDS?
> >I'd like to put them on Sherline's steppers, or Sanyo Denki 233-180-DU
> >motors.
> >
> >Alan KM6VV
> >
> >Dan Mauch wrote:
> >>
> >> Some time in early December I posted on the Sherline group my
> >> experience at putting a servo motor on a Sherline. I mentioned that it
> was
> >> running the X axis at 72 IPM at 25 lbs. force using a gecko drive and a
> >> small servo motor that I adapted to my nema 23 extrusions on the
> sherline.
> >> Unfortunately, I did not get a single comment until just recently. So I
> >> didn't persue making up a batch of these motors for the small machines
> like
> >> the taig, REX ,sherline and grissly. I spent a lot of time searching for
> a
> >> low cost motor that had the torque that I wanted good speed without it
> being
> >> excessive and having an appropriate CPR encoder. Most of the nice pittman
> >> motors have a gear ratio that is way to high with the 500 count encoders
> >> mounted one them and that combined with the .050 pitch of the leadscrew
> gave
> >> a 500X4X6x20=240,000 CPI. So I finally found a motor that had the torque
> >> and speed that I wanted with a ball bearing on the shaft. But the motor
> did
> >> not have provisions for an encoder on it so I had to design an adapter
> plate
> >> for the back of the motor to add a Agilent HEDS 5500 E 04 dual channel
> >> quadrature encoder. I modified a few more and will soon add them to the
> >> remaining axis. The resolution of this set up is 200X4X20=16000 CPI or
> >> .0000625"
> >> Dan
> >> -----Original Message-----
> >> From: Andrew Werby <drewid@...>
> >> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
> >> Date: Thursday, January 11, 2001 10:44 PM
> >> Subject: [CAD_CAM_EDM_DRO] Taig retrofit
> >> >I had a similar idea; but I'm retrofitting a Taig with Geckos and
> servos.
> >> >I'll have to make new motor-mounts, since no servos seem to be made with
> >> >NEMA 23 mounts, but having closed-loop speed and accuracy should make
> it
> >> >worthwhile. I got my Geckos a couple of days ago- they sure are small!
> I'm
> >> >wondering how hot they get when in use? Should I be attaching them to a
> big
> >> >heat-sink and fanning them?
> >> >
> >> >