Re: [Emc-users] Inductive Coupling
On Wed, 10 Apr 2013 15:00:33 +0100, you wrote: >On 10 April 2013 14:42, Kent A. Reed wrote: >> On 4/10/2013 8:56 AM, andy pugh wrote: >>> I have bought a Renishaw touch-probe. >> >> I infer you bought only the probe and not the "receiver". > >The consensus on IRC was that "bought" might be a misnomer, and >"stole" was closer. >http://www.ebay.co.uk/itm/Renshaw-Mp3-Probe-/271177751112 I have one, with the "receiver" side too :) I removed the sender unit and just wired it direct with 5V. I have mine mounted on an angle plate that fits on that router or my mill. I've CMM'd a couple of very expensive vintage guitars where I have been unable to get accurate body drawings ;) Steve Blackmore -- -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
I looked at our renishaw knock off for about 15 minutes then decided to pull the Glue mystery out and use the contacts.. http://electronicsam.com/images/KandT/probe/DSCF1507%5B1%5D.jpg http://electronicsam.com/images/KandT/probe/DSCF1508.jpg I do have to plug it in - but I got working a lot quicker than I would have otherwise... (btw - I don't know how I lived without one...) https://www.youtube.com/watch?v=U61ub6mtpH4 sam On 4/10/2013 7:56 AM, andy pugh wrote: > I have bought a Renishaw touch-probe. > > It has an inductive interface to connect to the controller, described > in patent GB2025073 > It appears that an LC circuit in the probe is shorted out by the probe > contacts when there is no contact. > All fairly simple, though finding what the resonant frequency is is > probably important. > > I am trying to think what might be a suitable device for the > "receiver". I guess I could wind a couple of sets of windings round a > ferrite, but there is probably something off-the-shelf that will work. > > I am even pondering the idea of sensing it with a spare Resolver > output from my Mesa 7i49 card. I suspect that if I had three windings > on the ferrite, with one further away from the probe than the other > then I would see a shift in apparent resolver angle, and could use > that as my probe input. > Maybe air-core would work better? > -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
On Wed, 10 Apr 2013, andy pugh wrote:
> Date: Wed, 10 Apr 2013 15:58:25 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: Re: [Emc-users] Inductive Coupling
>
> On 10 April 2013 15:18, Les Newell wrote:
>
>> Hopefully in the next couple of months I'll be getting a Hurco Hawk
>> which doesn't have a hollow spindle so I may look into using the MP3
>> probe instead.
>
> I was planning on using a hardwired connection, as the IMP module does
> lose me some precious Z-height, but the tinkerer in me wants to work
> out the clever system.
> I was planning to make a "magsafe" style connector for the probe that
> will break free in case of inadvertant spindle start.
>
> I am undecided on what I will end up with.
>
> --
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
The patent has a schematic of the receiver which is very simple.
basically its just a self resonant oscillator thats coupled to the LC
resonant circuit in the probe. They are using one shots to sense the frequency
shift (probably large, maybe 2-1 or more depending on how close the inductors
are coupled)
Toughest part is probably finding the right shaped ferrite to
couple well with the ferrite in the probe.
Peter Wallace
Mesa Electronics
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(='.'=) This is Bunny. Copy and paste bunny into your
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analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
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Re: [Emc-users] Inductive Coupling
On Wed, 10 Apr 2013, andy pugh wrote:
> Date: Wed, 10 Apr 2013 13:56:17 +0100
> From: andy pugh
> Reply-To: "Enhanced Machine Controller (EMC)"
>
> To: "Enhanced Machine Controller (EMC)"
> Subject: [Emc-users] Inductive Coupling
>
> I have bought a Renishaw touch-probe.
>
> It has an inductive interface to connect to the controller, described
> in patent GB2025073
> It appears that an LC circuit in the probe is shorted out by the probe
> contacts when there is no contact.
> All fairly simple, though finding what the resonant frequency is is
> probably important.
>
> I am trying to think what might be a suitable device for the
> "receiver". I guess I could wind a couple of sets of windings round a
> ferrite, but there is probably something off-the-shelf that will work.
>
> I am even pondering the idea of sensing it with a spare Resolver
> output from my Mesa 7i49 card. I suspect that if I had three windings
> on the ferrite, with one further away from the probe than the other
> then I would see a shift in apparent resolver angle, and could use
> that as my probe input.
> Maybe air-core would work better?
I suspect just making a driver that senses the load or phase of the drive coil
would be the simplest. Whether Air or ferrite is better depends mostly on the
carrier frequency (does the patent give a hint?)
>
> --
> atp
> If you can't fix it, you don't own it.
> http://www.ifixit.com/Manifesto
>
> --
> Precog is a next-generation analytics platform capable of advanced
> analytics on semi-structured data. The platform includes APIs for building
> apps and a phenomenal toolset for data science. Developers can use
> our toolset for easy data analysis & visualization. Get a free account!
> http://www2.precog.com/precogplatform/slashdotnewsletter
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
--
Precog is a next-generation analytics platform capable of advanced
analytics on semi-structured data. The platform includes APIs for building
apps and a phenomenal toolset for data science. Developers can use
our toolset for easy data analysis & visualization. Get a free account!
http://www2.precog.com/precogplatform/slashdotnewsletter
___
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Re: [Emc-users] Inductive Coupling
On 10 April 2013 15:18, Les Newell wrote: > Hopefully in the next couple of months I'll be getting a Hurco Hawk > which doesn't have a hollow spindle so I may look into using the MP3 > probe instead. I was planning on using a hardwired connection, as the IMP module does lose me some precious Z-height, but the tinkerer in me wants to work out the clever system. I was planning to make a "magsafe" style connector for the probe that will break free in case of inadvertant spindle start. I am undecided on what I will end up with. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
I have one of those. I bought it for a similar price a few years back. I did look into making an inductive pickup for it but never got very far as I also picked up a Renishaw LP2 probe at about the same time. I made a QC30 holder for the LP2 with an infra red emitter that fires up the hollow spindle on my BP Series 1 CNC (the tools are held by the flange rather than using a drawbar). A simple receiver on the top of the spindle completes the setup. The transmitter has a 1/2AA sized lithium battery that lasts about a year. Hopefully in the next couple of months I'll be getting a Hurco Hawk which doesn't have a hollow spindle so I may look into using the MP3 probe instead. Les On 10/04/2013 15:00, andy pugh wrote: > On 10 April 2013 14:42, Kent A. Reed wrote: >> On 4/10/2013 8:56 AM, andy pugh wrote: >>> I have bought a Renishaw touch-probe. >> I infer you bought only the probe and not the "receiver". > The consensus on IRC was that "bought" might be a misnomer, and > "stole" was closer. > http://www.ebay.co.uk/itm/Renshaw-Mp3-Probe-/271177751112 > -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
On 10 April 2013 14:42, Kent A. Reed wrote: > On 4/10/2013 8:56 AM, andy pugh wrote: >> I have bought a Renishaw touch-probe. > > I infer you bought only the probe and not the "receiver". The consensus on IRC was that "bought" might be a misnomer, and "stole" was closer. http://www.ebay.co.uk/itm/Renshaw-Mp3-Probe-/271177751112 -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
On 4/10/2013 8:56 AM, andy pugh wrote: > I have bought a Renishaw touch-probe. I infer you bought only the probe and not the "receiver". > > It has an inductive interface to connect to the controller, described > in patent GB2025073 > It appears that an LC circuit in the probe is shorted out by the probe > contacts when there is no contact. > All fairly simple, though finding what the resonant frequency is is > probably important. It's been 50 years since I last used a grid-dip meter but it's one way to get the job done if you want to know the resonant frequency of a tuned circuit. Regards, Kent -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Inductive Coupling
It might be operating at a low frequency, but you could try tuning for it on a handheld radio, like a small transistor MW radio held up close. Even way off-frequency you might be able to detect the difference between ON and OFF. You could then hunt for the strongest signal. Marcus On 10 Apr 2013, at 13:56, andy pugh wrote: > I have bought a Renishaw touch-probe. > > It has an inductive interface to connect to the controller, described > in patent GB2025073 > It appears that an LC circuit in the probe is shorted out by the probe > contacts when there is no contact. > All fairly simple, though finding what the resonant frequency is is > probably important. > > I am trying to think what might be a suitable device for the > "receiver". I guess I could wind a couple of sets of windings round a > ferrite, but there is probably something off-the-shelf that will work. > > I am even pondering the idea of sensing it with a spare Resolver > output from my Mesa 7i49 card. I suspect that if I had three windings > on the ferrite, with one further away from the probe than the other > then I would see a shift in apparent resolver angle, and could use > that as my probe input. > Maybe air-core would work better? > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > -- > Precog is a next-generation analytics platform capable of advanced > analytics on semi-structured data. The platform includes APIs for building > apps and a phenomenal toolset for data science. Developers can use > our toolset for easy data analysis & visualization. Get a free account! > http://www2.precog.com/precogplatform/slashdotnewsletter > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Inductive Coupling
I have bought a Renishaw touch-probe. It has an inductive interface to connect to the controller, described in patent GB2025073 It appears that an LC circuit in the probe is shorted out by the probe contacts when there is no contact. All fairly simple, though finding what the resonant frequency is is probably important. I am trying to think what might be a suitable device for the "receiver". I guess I could wind a couple of sets of windings round a ferrite, but there is probably something off-the-shelf that will work. I am even pondering the idea of sensing it with a spare Resolver output from my Mesa 7i49 card. I suspect that if I had three windings on the ferrite, with one further away from the probe than the other then I would see a shift in apparent resolver angle, and could use that as my probe input. Maybe air-core would work better? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
