Re: [CAD_CAM_EDM_DRO] Re: Tool bit height adjusmtments.

That's what tool length comp is for in CNC programs. It doesn't matter
what the tool length is - you just measure it and enter the length of
each tool from a datum. I turned an R-8 taper into a steel cylinder and
just sit that under my height gauge to measure each tool when I'm
setting up a job. The problem with CNC'ing the quill is that you very
quickly run out of clearance to remove/change the tool in the spindle.
Just CNC the knee that's what I say!

Cheers, Peter

turbulatordude wrote:

>--- 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
>
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