Re: Sherline Auto Tool Changer

At one time I had an Emco FB2 which had a MT2 taper, the end of the
taper was taped and it was tightened by a retained drawbolt, as you
slackened the drawbolt it ejected the taper.

Bernard

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "James Owens"
<wotisname@l...> wrote:

> Hi,
>
> I will have a think on this problem over the next week and come up

with some

> drawings. If a tool-holder is used, fitting into some sort of

holder/adapter

> which is fitted in the spindle, then there is no reason why the

same idea

> could not be used for Morse 1 - 3 and 30 int to 50 int and even R8.
>
> I don't like the idea of using parallel sides for the tool-holder

but maybe

> a self ejecting taper and an air chuck would do the job and still be
> scaleable down to fit a Sherline.
>
> A small circuit board/stepper drive(s) using a cheap PIC would take

care of

> the CNC auto-tool change side of things from the lazy-susan, or

even run the

> whole thing on pneumatics under PIC control?
>
> Regards,
>
> Terry
>
>
>
> > Ballendo;
> >
> > Now, we're getting somewhere !
> >
> > Hmm, you're right, the sherline collet is 'handy' cos it ready

made

> > and seems like the logical choice, but the spindle locking and
> > undoing the holder is a problem, you're right that it would be

very

> > difficult to undo, that was at the back of my mind, I guess I just
> > did not want to acknowledge it !!!
> >
> > The current morse 1 taper limits the collet and cutter size as it
> > assumes that the cutter will locate inside the spindle, but

there's

> > no reason why an adaptor can not fit on the end on the spindle and
> > interface to a quick change tool, I think there would still be
> > sufficient Z travel even with an adaptor on the end of the

spindle.

> >
> > We have gone through the first rule of troubleshooting which is to
> > elimante what it isn't (can't be done) now we only have to find

what

> > can - so it should be plain sailing from here on in :-)
> >
> > PeterC
> >