Re: [CAD_CAM_EDM_DRO] Auto tool changers

The six positions consist of three slots and three holes.

It might be more interesting to do somekind of BCD encoding
or something which would allow the PIC to know what position
the turret is currently in. That way you wouldn't have to
always start the turret in the same position when the PIC
powers up. Or I guess you could have somekind of a home switch
the PIC could read.

I'm curious how one would prevent the stepper from continously
pushing back on the "stop" too hard and/or for too long.

Drew

Alan Marconett KM6VV wrote:

>
> Hi Bill,
>
> Perhaps if a simple encoder disk is added to the turret. 6 slots (one
> to the edge), would allow two photo interrupter sw's to report the
> position of the turret. A PIC could then drive a stepper (even a simple
> unipolar driver), and do the "rotate past, drop back to lock" sequence
> that you've said is required to change the tools. I have a Sears/EMCO
> 5" lathe (no CNC... yet), would this fit on my lathe? How much? I'd be
> interested in a swap of some kind to get a mechanism to work with (kinda
> putting the cart before the CNC horse!).
>
> It only looks like three tool positions in the pix?
>
> Alan KM6VV
>
> wanliker@... wrote:
> >
> > In a message dated 2/21/2002 11:09:26 PM Mountain Standard Time,
> > johnhe-uk@... writes:
> >
> > > I'm thinking of three of four
> > > tools. I've looked but not found any prices on the internet
> >
> > If you go to the following URL, there are pictures of the guts of an EMCO
> > COMPACT 5 CNC/PC TURRET.
> >
> > http://www.grifftek.com/c5cnc/c5cnc.html
> >

--
Drew Rogge
drew@...