Re: Tool bit height adjusmtments.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Michael Moore" <mmoore@e...>
<snip> I was getting ready to ask how people dealt with manual
toolchanges and maintaining tooltip location while doing them.

>
> cheers,
> Michael

Hi Michael,


Les Watts had posted a 'spud' for lack of a better word, that could
fit into your collet and hold your tool bit.

the idea is that the device has a shoulder that would concact your
collet and the tool bit can be measured off of that shoulder.

Typically, one had a holder on the surface plate and makes all the
bits conform to some set of rules. If every tool was less than 3
inches, then all your drill retractions and milling retractions could
be to the same plane. That could save a buch of time, not to mention
broken bits.

an accurate height measuremnt would be needed so the surface plate is
a good standard to use.

of course it also means that you need to accuratly locate the tools
in the holder.

IIRC, there was some discussion on this last year and there are
links, photos and plans in the archives.

There is a possibility you can use milling holders in your machine
instead of collets. that would get you 90% of the way there.

Stop rings on tools would be similar. PCB drill bits often come with
a ring for depth/ location control.



Dave