Re: unimat classic

Hi Peter,

Yes, that's what I had in mind. But if the handwheels come off, that
would simplify things! You might want to look at Sherline's conversion
kit for their mill, with a collar to adapt the "threaded end" of the
leadscrew up to the tapered end piece that they use to mate up to the
flexible coupling, a set of NEMA #23's could be used. Or one might
"adopt" the ideas for the Unimat!

Thanks for the URL's, I didn't know they had so much!

Alan KM6VV


cadcamcenter@... wrote:

>
> Hi Alan,
>
> << I just looked at the flexible shaft that came with my new Dremel,
> and there is considerable windup. So I believe that option is out.>>
>
> sigh!!!! There goes a very neat idea!!
>
> << Do the handwheels come off? If not, how about a "cup", that could
> slip over the handwheel(s), and a 4mm shaft on the back of the cup,
> where a timing belt pulley could be mounted.>>>>
>
> Handwheels can come off exposing the threaded rod. The "cup" sounds
> workable, but may need pretty accurate machining, and there is a
> protruding handle, plus the wheel is not 100% circular but D-shaped.
> Something like the diagram below?
>
> BEFORE
>
> > > FRONT VIEW ....(hidden lines)
> > > ____________________
> > > __-- | ..................
> > > |__ \__| .
> > > | ...| ./\ /\ / approx 1mm pitch threaded rod
> > > | __|_.__\/__\/_
> > > | / |_.
>
> AFTER
>
> xxxxx (cup)
> sssss (shaft)
> ~~ belt
> /\
> | pulley
> \/
>
> xxxxx ____________________
> ~~ x_-- | ..................
> /\ |__ \__| .
> |sssx| ...| ./\ /\ / approx 1mm pitch threaded rod
> |sssx| __|_.__\/__\/_
> \/ x| / |_.
> ~~ x --
> xxxxx
>
> <<How about a pix? I'll bet someone on this list has some ideas!>>
>
> http://www.maxmax.com/fMini-mate.htm
> http://www.unimat.at/d_s_unim.htm
>
> May put a drawing somewhere on the web for viewing after I have
> enlisted the help of Mitutoyo for accurate measurement (CMM). I have
> only rough measurement at the moment obtained with a plastic venier
> caliper (mickey-mouse toy). May be good enough to get preliminary
> ideas, though.
>
> The x-axis is less of a problem because the motor and
> handwheel/pulley can be fixed onto a mounting plate, but the y-axis
> is the problem. Was thinking connecting the y-axis shaft to the
> motor, then mounting the motor separately on a movable castor, but
> sound like too much trouble.
>
> Thanks to all for great ideas put forth.
>
> Peter
>
> Great list! Plenty ideas! Plenty smart people!