Re: DIY CMM ??

Peter

Sounds like a job for the second generation babyhex.

Ray

> Date: Fri, 5 May 2000 13:58:42 EDT
> From: ptengin@...
>Subject: Re: DIY CMM ??
>
>In a message dated 05/05/2000 7:33:29 AM Hawaiian Standard Time,
>mmueller@... writes:
>
><< So has anyone built one that would be fairly accurate in the .001"
> to .0005" range.
> My parts are normally in the envelope of no bigger than 18" x 18" x
> 18". >>
>
>Ironically, Your CMM and a gantry mill big enough to do a 18 inch cube would
>have to be very massive and rigid to hold .0005". I think a more realistic
>range would be +- .002. I have tried to probe on a 3 axis DRO equipped
>Bridgeport. Not really good for more than a few dozen hits. Talk about
>cranking. The neatest system I've used is a Renishaw probe used as a joy
>stick. By grabbing the probe, one drags the stylus over the part. The cnc
>floats the gantry over the part as though you were moving a manual machine.
>Of course, it is recording position info as you go. If this system could be
>duplicated in a lower (much lower) cost version, you could build a medium
>duty gantry mill / CMM combo machine. Kill two birds with one stone.
>
> Just a thought.
>
>Peter
>THRD, Inc.