Re: [CAD_CAM_EDM_DRO] Probes

The probing sequence runs at the edge until it hits, backs up about 0.050,
and hits it again. As far as I know it's measuring on make since that's
when it beeps in the cycle.

On Thu, Jan 14, 2010 at 00:55, Roland Jollivet <Roland.Jollivet@...>wrote:

>
>
> 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@... <woodworker88%40gmail.com>
> >
>
>
> > 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@... <Roland.Jollivet%40gmail.com>
> > >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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