Re: [Emc-users] Faro Arm bit ot
On Fri, Aug 17, 2018, 7:20 PM Andy Pugh wrote: > I wanted this one to locate mounting holes and such on old vehicles. > (Need to make a radiator that actually fits). Again 1/16” is fine for > that. > > > Please, spare the torches and pitchforks. Stone not the messenger. I > openly admit the sacrilige , and despise myself even mentioning this , > please make no mention after delivery 😂😂😂 My son's friend did this http://www.techwarelabs.com/how-to-make-a-3d-scanner-from-an-xbox-360-kinect/ a win#+&$ 10 computer also includes the modeling software to regurgitate an stl from the scan , it's pretty precise for as simple as it is . All of that said I'm sure I shall pay penance now . -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
In light of retrofitting a controller for one; some of those have electric heaters installed along the arm, that keep each section slightly warm. Presumably this helps to mitigate errors caused by thermal expansion/contraction. > On Aug 17, 2018, at 7:18 PM, Andy Pugh wrote: > > > >> On 17 Aug 2018, at 15:00, Stuart Stevenson wrote: >> >> I purchased a Faro Arm Gold many years ago for a particular project. The >> claimed resolution was either +- .004 or .006. Horrible. > > I think that depends on the application. It isn’t a CMM. I have used them to > return the locations of accelerometers on van body shells. +/- 1mm is ok > there. I wanted this one to locate mounting holes and such on old vehicles. > (Need to make a radiator that actually fits). Again 1/16” is fine for that. > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
> On 17 Aug 2018, at 15:00, Stuart Stevenson wrote: > > I purchased a Faro Arm Gold many years ago for a particular project. The > claimed resolution was either +- .004 or .006. Horrible. I think that depends on the application. It isn’t a CMM. I have used them to return the locations of accelerometers on van body shells. +/- 1mm is ok there. I wanted this one to locate mounting holes and such on old vehicles. (Need to make a radiator that actually fits). Again 1/16” is fine for that. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
I purchased a Faro Arm Gold many years ago for a particular project. The claimed resolution was either +- .004 or .006. Horrible. Could not use it for the project. The new ones seem to be much better. An old cheap one would probably be useful only as a learning device and not for use as an inspection tool. Even the new ones need special handling techniques to return accurate data. On Fri, Aug 17, 2018, 7:00 AM John Figie wrote: > Yes figuring out the encoder interface would be the most work. It dosent > look like there are enough pins for 6 axes of sinusoidal quadrature signals > plus index. So it could be all digital interface. I wonder what the typical > acuracy and resolution is? Yeah now that I think about it more it seems > like quite a project. Would probably have to disassemble a joint to see the > encoder. > > John Figie > > On Fri, Aug 17, 2018, 6:28 AM andy pugh wrote: > > > On 17 August 2018 at 12:11, John Figie wrote: > > > > > I live about 1.5 hours from Madison. I had to look up what a Faro arm > is. > > > It looks interesting and may be a better way to probe an object than > > with a > > > touch probe in the milling machine. Why do think this is "quite a > > project"? > > > It seems straightforward to me. > > > > It uses a number of encoders in the joints to calculate the position > > in 3D space of the tip of the arm. > > WI don't know the encoder type, they might be serial or quadrature. > > You need to know the kinematics geometry in some detail to accurately > > calculate the position from the encoder data > > > > > I am interested in finding what you want for it. > > > > So far I have spent US$415 / UK£327 getting the arm from eBay to > > Madison. I would like to get all or most of that back. > > Original advert: https://www.ebay.co.uk/itm/192086672011 > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > — George Fitch, Atlanta Constitution Newspaper, 1916 > > > > > > > -- > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > ___ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
Yes figuring out the encoder interface would be the most work. It dosent look like there are enough pins for 6 axes of sinusoidal quadrature signals plus index. So it could be all digital interface. I wonder what the typical acuracy and resolution is? Yeah now that I think about it more it seems like quite a project. Would probably have to disassemble a joint to see the encoder. John Figie On Fri, Aug 17, 2018, 6:28 AM andy pugh wrote: > On 17 August 2018 at 12:11, John Figie wrote: > > > I live about 1.5 hours from Madison. I had to look up what a Faro arm is. > > It looks interesting and may be a better way to probe an object than > with a > > touch probe in the milling machine. Why do think this is "quite a > project"? > > It seems straightforward to me. > > It uses a number of encoders in the joints to calculate the position > in 3D space of the tip of the arm. > WI don't know the encoder type, they might be serial or quadrature. > You need to know the kinematics geometry in some detail to accurately > calculate the position from the encoder data > > > I am interested in finding what you want for it. > > So far I have spent US$415 / UK£327 getting the arm from eBay to > Madison. I would like to get all or most of that back. > Original advert: https://www.ebay.co.uk/itm/192086672011 > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > — George Fitch, Atlanta Constitution Newspaper, 1916 > > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
On 17 August 2018 at 12:11, John Figie wrote: > I live about 1.5 hours from Madison. I had to look up what a Faro arm is. > It looks interesting and may be a better way to probe an object than with a > touch probe in the milling machine. Why do think this is "quite a project"? > It seems straightforward to me. It uses a number of encoders in the joints to calculate the position in 3D space of the tip of the arm. WI don't know the encoder type, they might be serial or quadrature. You need to know the kinematics geometry in some detail to accurately calculate the position from the encoder data > I am interested in finding what you want for it. So far I have spent US$415 / UK£327 getting the arm from eBay to Madison. I would like to get all or most of that back. Original advert: https://www.ebay.co.uk/itm/192086672011 -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
Andy, I live about 1.5 hours from Madison. I had to look up what a Faro arm is. It looks interesting and may be a better way to probe an object than with a touch probe in the milling machine. Why do think this is "quite a project"? It seems straightforward to me. I built my own touch probe a few years ago to copy a gun stock for a friend. Then milled some copies out of walnut. I am interested in finding what you want for it. John Figie On Fri, Aug 17, 2018, 5:07 AM Andrew wrote: > 2018-08-17 12:41 GMT+03:00 andy pugh: > > > My plan was to reverse-engineer the encoder data and then use trivkins > > for the kinematics. It was always going to be quite a project, so > > don't expect to be ever be actually _using_ the arm. > > > > I think that old Faro arms have incremental encoders. > Each joint has to find its index before it can be used. > https://youtu.be/de_Yqf-zOJI > > I was lucky to purchase a complete Gold arm off ebay for cheap a couple of > years back. It's pretty nice, but the latest Faro arms with laser scanners > are absolutely amazing. > > -- > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Faro Arm
2018-08-17 12:41 GMT+03:00 andy pugh: > My plan was to reverse-engineer the encoder data and then use trivkins > for the kinematics. It was always going to be quite a project, so > don't expect to be ever be actually _using_ the arm. > I think that old Faro arms have incremental encoders. Each joint has to find its index before it can be used. https://youtu.be/de_Yqf-zOJI I was lucky to purchase a complete Gold arm off ebay for cheap a couple of years back. It's pretty nice, but the latest Faro arms with laser scanners are absolutely amazing. -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Faro Arm
Does anyone have a use for an old Faro arm with no driver PC or software? I bought it on eBay because the price was good, but it is in the US and I don't seem to be able to find a way to get it to the UK for less than twice the price I paid for it. The arm is currently in Madison, WI in the garage of a friend. My plan was to reverse-engineer the encoder data and then use trivkins for the kinematics. It was always going to be quite a project, so don't expect to be ever be actually _using_ the arm. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 -- Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
