Re: [CAD_CAM_EDM_DRO] Probes

Thanks for that.
So I presume the probes go with the carousel, and are subjected to quite a
bit of bumping.

Also, are probes always measuring on 'break' only, or do do you have the
option to measure on a 'make'. Obviously once the contact has broken , the
probe is in an unknown place, but as it makes contact, it's back to a known.

Roland



2010/1/14 Michael Fagan <woodworker88@...>

> We run Renishaw probes on all of our CNC equipment. The tips are simply
> carefully unscrewed and replaced. Since the probe has overtravel
> protection
> (nearly 0.25") as long as you're careful you can't break it. As for the
> concentricity, the Renishaw macros contain a calibration sequence which
> involves jogging the probe to the approximate center of a known concentric
> object, such as a ring gauge or a high quality bearing race. The macro
> finds the center of the ring 4 times, rotating the probe by 90 degrees each
> time. While the macro does this with the aid of a spindle encoder, you
> could also probably rewrite the macro to allow you to manually index the
> spindle.
>
> On Wed, Jan 13, 2010 at 14:29, Roland Jollivet <Roland.Jollivet@...
> >wrote:
>
> >
> >
> > Hi All
> >
> > Does anyone here have experience with commercial probes, like Renishaw?
> >
> > I've been looking at some designs, and what concerns me is tip-changing.
> > I can't find any documentation to explain how a device that is sensitive
> to
> > 0.2g touching can withstand the screwing off, and in of a different tip
> > without possibly distorting the internals.
> >
> > Also, when a probe is mounted in the spindle, and although it usually
> does
> > not turn, is the ball at the end meant to be concentric with the mill
> > spindle to within the accuracy of the probe, like less than a 1um?
> >
> > Roland
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>
>
>
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