Re: [CAD_CAM_EDM_DRO] Re: Tool changing?

On Tue, 2 Sep 2003, Jon Elson wrote:
> baugher_c wrote:
> >How about this. If I make an extension to the end of the drawbar so
> >that it protrudes down through most of the length of the collet. Then
> >the cutter is pushed up into the collet until it hits the drawbar.
> >When the drawbar is tightened it pulls the collet in but the tool
> >can't move because it's up against the drawbar. It's sounds like kind
> >of a kludge but I think it might work.

> Maybe. I think it will just bind up when the tool hits the drawbar, whether
> the collet is tightened properly or not. But, it would be pretty easy
> to try
> it. You could put a dial indicator on a block, and slip in under the tool
> to measure how repeatable the indexing of the tool really is.

Yeah, it might bind up. I'll try it tomorrow.

> Of course, this won't work really well with double-ended end mills,
> as they will bite into the end of the drawbar.

Which is fine because I don't like double ended mills. I never knew
exactly why, until now!


I should also mention that this is a small hobby type machine. The speeds
and feeds are low so the tool doesn't need to be super tight.

C|