Re: [CAD_CAM_EDM_DRO] Probes

Ah, got it. I've never written a macro since we get all those from Renishaw
through Haas, but good to know.

On Fri, Jan 15, 2010 at 12:10, Will Holding <76lancia@...> wrote:

>
>
> It's actually on break technically (electrically) since the Renishaw design
>
> is a normally closed cicuit. It 'breaks" when the probe comes into contact
> with the work and lifts one of the three radial posts inside the probe from
>
> its pair of of ball bearings it rests on.
>
> The reason I bring it up is not to be a pedantic boner, but because you
> have
> to configure your CNC program the correct way so you don't crash your
> probe,
> which is kind of important..
>
> An electronic edge finder converted to a probe, etc. will be normally open-
>
> so must be configured the opposite way in your CNC control.
>
> -Will
>
>
> ----- Original Message -----
> From: "Michael Fagan" <woodworker88@... <woodworker88%40gmail.com>>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com <CAD_CAM_EDM_DRO%40yahoogroups.com>>
> Sent: Friday, January 15, 2010 11:56 AM
> Subject: 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@... <Roland.Jollivet%40gmail.com>>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>
> >> <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><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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>
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> >
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