Re: [Emc-users] Power and data cables for CNC
On 05/21/2012 09:15 AM, Jon Elson wrote: Rafael Skodlar wrote: On 05/20/2012 12:12 PM, Dave wrote: On 5/20/2012 12:40 PM, Rafael Skodlar wrote: I wonder what kind of power and data cables would you recommend for use in X-Y-Z CNC about 1.2mx1m size? Besides power, it's not clear to me how many data lines for sensors, encoders, motor control, etc. are needed in general. I'm well familiar with flexing and shielding issues in general since early HP plotter days. I was hoping to get a simple answer based on real life experience, get this or that cable with x number of shielded and stranded or twisted wires ;-) That's why I mentioned size as that would give one an idea of motor sizes and other requirements. Is it better to have one cable with x number of wires to take care of all needs or a number of smaller cables (y) with x/y wires? With non-filtered motor drives, it is pretty important to NOT put encoder or other signal-level wires in the same cable as the motor wires. I usually separate encoder, home/limit sensors and motors on 3 cables per axis, even though my motor drives ARE filtered. A plain quadrature encoder needs 4 wires, if it has index then 5. If differential, then 6 or 8 wires. If brushless motors are used, those usually need Hall sensors, add 4 more wires. Stepper motors need a minimum of 4 wires, brush servos need 2 plus maybe a safety ground, brushless would need 3 plus ground. You can check the catalogs for the number and size of the wire strands. The more fine wires there are, the better the cable will handle flexing. The good stuff has #36 AWG or finer strands, thinner than hair. Jon Thank you very much for detailed advice to all of you that responded to my question. I received enough material to spend a few evenings doing my homework. It's much easier to start knowing what others have tried and what works in different circumstances. Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. -- Rafael -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
On Mon, 21 May 2012 18:04:53 -0700 (PDT), you wrote: I never use the H-number, it is only useful for applying the offset of It may be not useful in LinuxCNC but I guarentee you 90% + of the mill programs in the world use it (Fanuc has to have it) also the Dxx If you omit the D on Fanuc no offset will be applied to G41,G42 Agreed - it should really error if you fail to tell it which offset to apply. Steve Blackmore -- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
On 22 May 2012 02:04, Terry Christophersen tcninj...@yahoo.com wrote: I never use the H-number, it is only useful for applying the offset of It may be not useful in LinuxCNC but I guarentee you 90% + of the mill programs in the world use it Well, yes, but we are using LinuxCNC. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power and data cables for CNC
On 22 May 2012 07:53, Rafael Skodlar ra...@linwin.com wrote: Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. There is solid stranded for fixed installation and stranded for patch cables. http://uk.rs-online.com/web/c/cables-wires/network-communication-cable/cat5e-cable/?searchTerm=cat5 The stranded would be very much preferred. There are many other types of multicore cable, it is just that CAT5 is readily available. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 05/21/2012 04:40 PM, dave wrote: On Mon, 21 May 2012 14:27:06 -0400 N. Christopher Perryn_christopher_pe...@me.com wrote: When money is no object I love the toolchanger! N. Christopher Perry On May 21, 2012, at 13:24, Roland Jollivet roland.jolli...@gmail.com wrote: One of the better videos of large format CNC for those in want of a nice bedtime video; http://www.youtube.com/watch?v=Xn7tsNG6pyo Regards Roland Gee Santa. I'd like one for Xmas. Really cool way to do internal teeth. Dave ps. even a .1 scale model would do. Yeh. Please Dad? Please, please, please Mark -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power and data cables for CNC
On Tuesday, May 22, 2012 05:25:01 AM Rafael Skodlar did opine: On 05/21/2012 09:15 AM, Jon Elson wrote: Rafael Skodlar wrote: On 05/20/2012 12:12 PM, Dave wrote: On 5/20/2012 12:40 PM, Rafael Skodlar wrote: I wonder what kind of power and data cables would you recommend for use in X-Y-Z CNC about 1.2mx1m size? Besides power, it's not clear to me how many data lines for sensors, encoders, motor control, etc. are needed in general. I'm well familiar with flexing and shielding issues in general since early HP plotter days. I was hoping to get a simple answer based on real life experience, get this or that cable with x number of shielded and stranded or twisted wires ;-) That's why I mentioned size as that would give one an idea of motor sizes and other requirements. Is it better to have one cable with x number of wires to take care of all needs or a number of smaller cables (y) with x/y wires? With non-filtered motor drives, it is pretty important to NOT put encoder or other signal-level wires in the same cable as the motor wires. I usually separate encoder, home/limit sensors and motors on 3 cables per axis, even though my motor drives ARE filtered. A plain quadrature encoder needs 4 wires, if it has index then 5. If differential, then 6 or 8 wires. If brushless motors are used, those usually need Hall sensors, add 4 more wires. Stepper motors need a minimum of 4 wires, brush servos need 2 plus maybe a safety ground, brushless would need 3 plus ground. You can check the catalogs for the number and size of the wire strands. The more fine wires there are, the better the cable will handle flexing. The good stuff has #36 AWG or finer strands, thinner than hair. Jon Thank you very much for detailed advice to all of you that responded to my question. I received enough material to spend a few evenings doing my homework. It's much easier to start knowing what others have tried and what works in different circumstances. Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. Solid single strand cat5 can be amazingly durable. I have have a piece about 35 feet long, suspended by black tie-wraps from an eyelet on each end, from the back corner of my back porch roof, to the apex of a 12x16 shed I have some of my machines in, since about 2001. Blowing in the wind, which 2 years ago this June 23th, peaked at 112 mph and took down 3 mature pine trees and part of my houses roof, about $10K State Farm wrote a check for, but that piece of cat5 hasn't dropped a byte. When I put it up, I fully expected to have to replace it annually so I am pleasantly surprised. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene Dyslexics have more fnu. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
On Tuesday, May 22, 2012 05:38:32 AM andy pugh did opine: On 22 May 2012 02:04, Terry Christophersen tcninj...@yahoo.com wrote: I never use the H-number, it is only useful for applying the offset of It may be not useful in LinuxCNC but I guarentee you 90% + of the mill programs in the world use it Well, yes, but we are using LinuxCNC. Yep. I was watching a big machine, a 5 axis, doing a 427 ford block from a nearly 400 lb block of alu forging, and was amazed to see it doing the sailors hornpipe jig as it bored the liner holes. We all know that LinuxCNC can do that in one spiral motion, probably 2x faster than that HAAS control was doing it. Blew me away. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I'd love to go out with you, but the man on television told me to stay tuned. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On Tue, May 22, 2012 at 10:36 AM, Mark Wendt mark.we...@nrl.navy.mil wrote: On 05/21/2012 04:40 PM, dave wrote: On Mon, 21 May 2012 14:27:06 -0400 N. Christopher Perryn_christopher_pe...@me.com wrote: When money is no object I love the toolchanger! N. Christopher Perry On May 21, 2012, at 13:24, Roland Jollivet roland.jolli...@gmail.com wrote: One of the better videos of large format CNC for those in want of a nice bedtime video; http://www.youtube.com/watch?v=Xn7tsNG6pyo Regards Roland Gee Santa. I'd like one for Xmas. Really cool way to do internal teeth. Dave ps. even a .1 scale model would do. Yeh. Please Dad? Please, please, please I think dad has designs on that as well http://www.collection.archivist.info/Dad%27s%20Shed!.JPG Dave Caroline -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 05/22/2012 06:23 AM, Dave Caroline wrote: On Tue, May 22, 2012 at 10:36 AM, Mark Wendtmark.we...@nrl.navy.mil wrote: On 05/21/2012 04:40 PM, dave wrote: On Mon, 21 May 2012 14:27:06 -0400 N. Christopher Perryn_christopher_pe...@me.comwrote: When money is no object I love the toolchanger! N. Christopher Perry On May 21, 2012, at 13:24, Roland Jollivet roland.jolli...@gmail.comwrote: One of the better videos of large format CNC for those in want of a nice bedtime video; http://www.youtube.com/watch?v=Xn7tsNG6pyo Regards Roland Gee Santa. I'd like one for Xmas. Really cool way to do internal teeth. Dave ps. even a .1 scale model would do. Yeh. Please Dad? Please, please, please I think dad has designs on that as well http://www.collection.archivist.info/Dad%27s%20Shed!.JPG Dave Caroline I'd give my left you-know-what for a shop that size. Nice! Mark -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
Why does it matter how other controls work? John On 5/21/2012 8:04 PM, Terry Christophersen wrote: I never use the H-number, it is only useful for applying the offset of It may be not useful in LinuxCNC but I guarentee you 90% + of the mill programs in the world use it (Fanuc has to have it) also the Dxx If you omit the D on Fanuc no offset will be applied to G41,G42 Terry - Original Message - From: andy pughbodge...@gmail.com To: Enhanced Machine Controller (EMC)emc-users@lists.sourceforge.net Cc: Sent: Monday, May 21, 2012 5:57 PM Subject: Re: [Emc-users] Tool Offsets On 21 May 2012 20:51, Eric H. Johnsonejohn...@camalytics.com wrote: T3 M6 G43 H3 I never use the H-number, it is only useful for applying the offset of a non-loaded tool to the loaded tool. Though I doubt that is your problem. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On Tuesday, May 22, 2012 07:31:28 AM Mark Wendt did opine: On 05/22/2012 06:23 AM, Dave Caroline wrote: On Tue, May 22, 2012 at 10:36 AM, Mark Wendtmark.we...@nrl.navy.mil wrote: On 05/21/2012 04:40 PM, dave wrote: On Mon, 21 May 2012 14:27:06 -0400 N. Christopher Perryn_christopher_pe...@me.comwrote: When money is no object I love the toolchanger! N. Christopher Perry On May 21, 2012, at 13:24, Roland Jollivet roland.jolli...@gmail.comwrote: One of the better videos of large format CNC for those in want of a nice bedtime video; http://www.youtube.com/watch?v=Xn7tsNG6pyo Regards Roland Gee Santa. I'd like one for Xmas. Really cool way to do internal teeth. Dave ps. even a .1 scale model would do. Yeh. Please Dad? Please, please, please I think dad has designs on that as well http://www.collection.archivist.info/Dad%27s%20Shed!.JPG Dave Caroline I'd give my left you-know-what for a shop that size. Left? Heck, I'd offer both, I've been disarmed for 40 years, and diabetes has fixed the other so they aren't doing me any good. I'd hang a name on my shed, but there's not enough flat space on the front for a name. I have double swinging doors, with an overhead sheltering roof that hides most of the gable end. I agree, that is nice. Nice! Mark Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene He is the MELBA-BEING ... the ANGEL CAKE ... XEROX him ... XEROX him -- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
the h number is also useful for code that is explicit. implicit and default treatments are the typical haunts of misbehavior and error. application of ambiguity to machine control command articles may be some kind of requirement for thinking machines. automating a defined, standardized process is not really a good place for custom tribal practices. --- On Mon, 5/21/12, andy pugh bodge...@gmail.com wrote: From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Tool Offsets To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Monday, May 21, 2012, 3:57 PM On 21 May 2012 20:51, Eric H. Johnson ejohn...@camalytics.com wrote: T3 M6 G43 H3 I never use the H-number, it is only useful for applying the offset of a non-loaded tool to the loaded tool. Though I doubt that is your problem. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
On Tuesday, May 22, 2012 07:39:37 AM John Thornton did opine: Why does it matter how other controls work? John So you don't have to totally retrain a new hire? Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene If Microsoft built cars, you would have to press the Start button to turn them off. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 05/22/2012 07:38 AM, gene heskett wrote: I'd give my left you-know-what for a shop that size. Left? Heck, I'd offer both, I've been disarmed for 40 years, and diabetes has fixed the other so they aren't doing me any good. I'd hang a name on my shed, but there's not enough flat space on the front for a name. I have double swinging doors, with an overhead sheltering roof that hides most of the gable end. I agree, that is nice. Nice! Mark Cheers, Gene Gene, The left was just the starting point for negotiations. You never wanna give away to much at the start. Mark -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
2012/5/22 John Thornton bjt...@gmail.com: Why does it matter how other controls work? Not to reinvent the wheel and learn from existing examples of good solutions to some problems. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 22 May 2012 11:30, Mark Wendt mark.we...@nrl.navy.mil wrote: I'd give my left you-know-what for a shop that size. It would be difficult to keep warm enough to work in. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
reducing the rtfm overhead would be a nice break also. --- On Tue, 5/22/12, gene heskett ghesk...@wdtv.com wrote: From: gene heskett ghesk...@wdtv.com Subject: Re: [Emc-users] Tool Offsets To: emc-users@lists.sourceforge.net Date: Tuesday, May 22, 2012, 4:40 AM On Tuesday, May 22, 2012 07:39:37 AM John Thornton did opine: Why does it matter how other controls work? John So you don't have to totally retrain a new hire? Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene If Microsoft built cars, you would have to press the Start button to turn them off. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On Tuesday, May 22, 2012 07:55:32 AM Mark Wendt did opine: On 05/22/2012 07:38 AM, gene heskett wrote: I'd give my left you-know-what for a shop that size. Left? Heck, I'd offer both, I've been disarmed for 40 years, and diabetes has fixed the other so they aren't doing me any good. I'd hang a name on my shed, but there's not enough flat space on the front for a name. I have double swinging doors, with an overhead sheltering roof that hides most of the gable end. I agree, that is nice. Nice! Mark Cheers, Gene Gene, The left was just the starting point for negotiations. You never wanna give away to much at the start. Mark Chuckle. A momentary lapse of memory is all I can plead though. :) Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I haven't lost my mind; I know exactly where I left it. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 05/22/2012 07:52 AM, andy pugh wrote: On 22 May 2012 11:30, Mark Wendtmark.we...@nrl.navy.mil wrote: I'd give my left you-know-what for a shop that size. It would be difficult to keep warm enough to work in. I think I might manage to find a way. ;-) Mark -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 05/22/2012 07:56 AM, gene heskett wrote: Cheers, Gene Gene, The left was just the starting point for negotiations. You never wanna give away to much at the start. Mark Chuckle. A momentary lapse of memory is all I can plead though. :) Cheers, Gene You're forgiven. ;-) Mark -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On Tuesday, May 22, 2012 07:57:20 AM andy pugh did opine: On 22 May 2012 11:30, Mark Wendt mark.we...@nrl.navy.mil wrote: I'd give my left you-know-what for a shop that size. It would be difficult to keep warm enough to work in. Which is why I do woodwork in the garage, its better insulated than the house. 1 1500 watt heater set at 65F keeps it tolerable in the winter an 18k btu AC keeps it refrigerated in the summer. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I haven't lost my mind; I know exactly where I left it. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
Terry, I am strongly suspecting that it has something to do with named external subroutines. I have used coordinate systems (G54-59, G10 L2, etc.) extensively in the past without any problems. This is the first time I have used the tool table for X, Y, etc. offsets, but the problems I am encountering are similar enough to what I was seeing with coordinate systems that it seems it must be related. The main difference with this application is the extensive use of name subroutines. However there are no motion commands in any of these subroutines, they are mainly for asserting digital outputs, checking inputs, applying dwells, etc. This is on a production machine, so I have limited ability to run tests on it, but I have just put a box together for simulation purposes. I should be able to do some better problem isolation on it over the next couple days. I am open to ideas as to what to look for. Thanks, Eric G49 cancels G43 Se just nd the machine home at the end of the prog using: G28G91Z0.0 Y0.0 X0.0 You should not need to use G49 You must be doing something else wrong Start of every one of my progs look like this: T1M6 G54G90G0XxxYxxS500M3 G43H1Z.1M8 moves the tool down to .1 above the workpiece blah blah ends look like this: G28G91 Z0.0 send the Z home G28G91Y0.0 send the y home to put in a new part M30 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
a whole robot to swap tools: the prelude to an opera of the waking maintenace nightmare. --- On Tue, 5/22/12, gene heskett ghesk...@wdtv.com wrote: From: gene heskett ghesk...@wdtv.com Subject: Re: [Emc-users] OT : large cnc To: emc-users@lists.sourceforge.net Date: Tuesday, May 22, 2012, 5:00 AM On Tuesday, May 22, 2012 07:57:20 AM andy pugh did opine: On 22 May 2012 11:30, Mark Wendt mark.we...@nrl.navy.mil wrote: I'd give my left you-know-what for a shop that size. It would be difficult to keep warm enough to work in. Which is why I do woodwork in the garage, its better insulated than the house. 1 1500 watt heater set at 65F keeps it tolerable in the winter an 18k btu AC keeps it refrigerated in the summer. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I haven't lost my mind; I know exactly where I left it. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
On 21 May 2012 20:51, Eric H. Johnson ejohn...@camalytics.com wrote: Per the Setting Coordinate Systems thread, I converted from using coordinate systems (G54-G59.3) and setting the offsets with G10 L2, to using the offsets specified in the tool table. Mostly it worked without a problem. The exception is when re-running a program without reloading it. Can you show us the G-code? Are you writing to the tool table in G-code? I wonder if the software only writes to the tool file on exit? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Tool Offsets
I agree it is good to learn from other control systems but the wheel is reinvented every day with a better wheel. If not we would still be driving Model A's in any color you like as long as it is black. I did a brake job on my van yesterday and the rear calipers were strange and different than any other disk brake caliper that I had seen before and I had to search the internet to figure out how to retract the piston... same principle but reinvented to be better. snip white noise that added nothing to the thread snip John On 5/22/2012 6:50 AM, Viesturs Lācis wrote: 2012/5/22 John Thorntonbjt...@gmail.com: Why does it matter how other controls work? Not to reinvent the wheel and learn from existing examples of good solutions to some problems. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
It can be (and has been) done. You probably will need to keep the encoders on the motors, unless your ballscrews and the rest of the drivetrain is very tight and backlash free. The trick is to use the motor encoders for the P and D parts of the PID loop, for stability, and use the linear scales for the I part, to correct the small and fairly slow-changing error between the screw and the scale. Follow the link below for a blog posting about how we did exactly that on a large boring mill: http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html On Tue, May 22, 2012, at 01:43 PM, erik.555.gr...@gmail.com wrote: Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
Glass scale is THE solution for really high precision. (this remove ball screws geometric error, as well as mostly all flexure error). Unfortunately, it is usually not possible to get a good servo loop with the linear glass directly, thus an encoder on the motor is still needed (mostly to have a wide bandwidth on the servo loops control). Basically, the concept is to use the motor encoder for high frequency information (Derivative term of the PID), and the glass scale for the Integrator term. Things start to get complex for the P term.. it may be a mix of both, or different algorithm... this is upon the bandwidth wanted and geometrics of the machine. Le 22.05.2012 15:43, erik.555.gr...@gmail.com a écrit : Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for positionfeedback
PID control loops are math function implementations that assume no discontinuities or delays in the feedback path, which includes the mechanical parts. Backlash causes discontinuity and will cause the PID to over-respond during the backlash interval. This can be tamed somewhat by reducing gain, but if there is significant backlash, the system will slam back and forth across the backlash and beat the machine to death. Steve Stallings -Original Message- From: erik.555.gr...@gmail.com [mailto:erik.555.gr...@gmail.com] Sent: Tuesday, May 22, 2012 8:44 AM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Servo system and glass encoder scales for positionfeedback Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
On Tue, 22 May 2012 13:43:33 + erik.555.gr...@gmail.com wrote: Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews Used alone I think there is a disadvantage. The low count simply adds to the quantization problem i.e. not enough counts/servo cycle. The hybrid approach I think is almost ideal. I'm beginning to think that using a gear train between the servo motor and the encoder may have advantages especially where one uses a glass scale for final position. I recently took and encoder off the end of the servo motor where I had iffy mechanical implementation and used a small timing gear to put the encoder on the coupling belt between the servo motor and the ballscrew. After I got the timing gear done correctly; it had come loose and was driving me even more nuts. ;-) ( I helped it with a bit of blue locktite. :-) I now have just over 100K counts/inch which makes tuning really nice. The axis also has a glass scale but I've not hooked it to I, yet! The glass scale is a 10 um so a bit coarse but just fine for my well used machine. There is a difference between control and accuracy and few well used machines will hold better than a thou. Sorry for rambling on. HTH Dave BTW- there is agreement between the encoder (emc display) and the glass scale on a accurite dro of at worst one or two counts. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power and data cables for CNC
Rafael Skodlar wrote: Thank you very much for detailed advice to all of you that responded to my question. I received enough material to spend a few evenings doing my homework. It's much easier to start knowing what others have tried and what works in different circumstances. Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. There appear to be at least 3 kinds of Cat-5 cable. Solid wire is made for stringing in ceilings and walls, where it will never be moved. Some cables made for use from wall jack to computer, etc. have 7 strands, some for more frequent flexing have something like 31 strands. But, I really don't recommend Cat-5 at all for encoders. For one thing, shielded Cat-5 cable is rare. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power and data cables for CNC
On 5/22/2012 12:07 PM, Jon Elson wrote: Rafael Skodlar wrote: Thank you very much for detailed advice to all of you that responded to my question. I received enough material to spend a few evenings doing my homework. It's much easier to start knowing what others have tried and what works in different circumstances. Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. There appear to be at least 3 kinds of Cat-5 cable. Solid wire is made for stringing in ceilings and walls, where it will never be moved. Some cables made for use from wall jack to computer, etc. have 7 strands, some for more frequent flexing have something like 31 strands. But, I really don't recommend Cat-5 at all for encoders. For one thing, shielded Cat-5 cable is rare. Jon For one thing, shielded Cat-5 cable is rare. I see it all of the time. Fry Electronics had it on the shelf in Indianapolis. $17 for 100 foot shielded patch cable. Pretty cheap. http://www.cablemax.com/productdetails1.cfm?sku=306423cats=99152 You can find it in bulk reels also. Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Servo system and glass encoder scales for position feedback
On 22 May 2012 15:51, John Kasunich jmkasun...@fastmail.fm wrote: It can be (and has been) done. You probably will need to keep the encoders on the motors, unless your ballscrews and the rest of the drivetrain is very tight and backlash free. The trick is to use the motor encoders for the P and D parts of the PID loop, for stability, and use the linear scales for the I part, to correct the small and fairly slow-changing error between the screw and the scale. Follow the link below for a blog posting about how we did exactly that on a large boring mill: http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html On Tue, May 22, 2012, at 01:43 PM, erik.555.gr...@gmail.com wrote: Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews Does this mean you can use lower resolution encoders on the motor, or should they be similar? If you had 1um resolution on the fixed linear scale, what linear resolution should the rotary encoder yield? Regards Roland -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Need Help from U.S. Users Companies - APT (Automatically Programmed Tools)
Dear Linuxcnc Users, I've been talking with a gentleman from NASA who worked on the last version of APT (APT 4 SSX 8) developed with public funding, about releasing the code for everyone's use and education. After some searching, a copy of this has been found. This program is written in Fortran and is a much more recent vintage (ran on Sun Workstations) than the IBM360 version we currently have to work with. It also has improvements to the pocketing routines developed at NASA. As with any activity involving governments, a great deal of paperwork needs doing to ensure that the activity is justified, causes no harm to U.S. interests, doesn't discriminate against people with disabilities, or people who are members of a protected class, etc. All i's must be dotted and t's crossed before the code can be released. The area I need help with is (for lack of a better term) justification. That is; Will releasing this code be helpful to any U.S. based companies or educational institutions? If you represent (or are a part of, or participate in, or are otherwise involved with) a U.S. based company or educational institution, of any size, AND would benefit in any way from the availability of this source code, I would like to hear from you. At the moment, all I need is some idea of: 1. Who you are. 2. What company or institution. 3. A BRIEF (one or two sentences will do, though more is fine) description of what benefit you would receive. Later on this may have to be written on your company or school letterhead, but for now a short reply to this post would be very welcome. I would also be interested in hearing from any people with experience in Fortran who would be interested in helping port this code to the Linux platform. If you could indicate your level of Fortran experience and any reasons for your interest in this code, that would be very helpful. Please also speak up if you have an interest in studying the algorithms in the existing Fortran with an eye towards reimplementing them in another programming language. Thanks, Matt Shaver -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Intel DN2800MT - possible new LinuxCNC star?
Hi everyone, I just ran into Intel DN2800MT mini-ITX motherboard. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dn2800mt.html It has HDMI, LVDS (can be useful for LCD panels), LPT header, two miniPCIe slots (SSD and wifi if necessary) and built-in PSU! (8-19V DC input required). PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Very thin board, all looks perfect. Costs $105. But the most important question is: Anyone tested the latency? Regards, Andrew -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
2012/5/22 Andrew parallel.kinemat...@gmail.com: Hi everyone, I just ran into Intel DN2800MT mini-ITX motherboard. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dn2800mt.html It has HDMI, LVDS (can be useful for LCD panels), LPT header, two miniPCIe slots (SSD and wifi if necessary) and built-in PSU! (8-19V DC input required). 8-19V DC input = perfect for car-PC. PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Is there a PCIe-to-PCI adapter available? Anyone tested the latency? Latency _should_ be very good. But I doubt that I will buy this board as it has not pci slot. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
On 22 May 2012 15:01, Claude Froidevaux men...@bluewin.ch wrote: Basically, the concept is to use the motor encoder for high frequency information (Derivative term of the PID), and the glass scale for the Integrator term. Things start to get complex for the P term.. it may be a mix of both, or different algorithm You can simply add the outputs of two PID controllers together in this sort of setup. Alternatively you could use the output of a position PID controller which uses the glass scales as feedback as the input to a second PID controller which uses the motor velocity (or possibly position) for feedback. The latter solution ought to work well for machines with tachometers on the servos, except I don't know of very many high-bandwidth, pipolar, analogue-input devices for LinuxCNC. (The Mesa 7i65 looks like it might work, but I don't know if it has been tried). It has just occurred to me that it might be possible to combine tacho and command voltages completely in the analogue domain for these machines… -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
On Tue, 22 May 2012 18:39:05 +0200 Roland Jollivet roland.jolli...@gmail.com wrote: On 22 May 2012 15:51, John Kasunich jmkasun...@fastmail.fm wrote: It can be (and has been) done. You probably will need to keep the encoders on the motors, unless your ballscrews and the rest of the drivetrain is very tight and backlash free. The trick is to use the motor encoders for the P and D parts of the PID loop, for stability, and use the linear scales for the I part, to correct the small and fairly slow-changing error between the screw and the scale. Follow the link below for a blog posting about how we did exactly that on a large boring mill: http://jmkasunich.com/cgi-bin/blosxom/shoptask/wichita-trip-02-20-08.html On Tue, May 22, 2012, at 01:43 PM, erik.555.gr...@gmail.com wrote: Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews Does this mean you can use lower resolution encoders on the motor, or should they be similar? If you had 1um resolution on the fixed linear scale, what linear resolution should the rotary encoder yield? Regards Roland IMHO ... as high as you can realize without overflowing the bandwidth of the encoder channel. If you can pickup encoders off dead red_cap Fanuc motors you should do very well. I think Jon Elson has doped out how to decode them. :-) Again anything you can do to reduce the digital jitter (quantization) at low to the high end of practical speeds will improve your motion. Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
On Tue, May 22, 2012 at 07:22:37PM +0100, andy pugh wrote: It has just occurred to me that it might be possible to combine tacho and command voltages completely in the analogue domain for these machines? Isn't this exactly what velocity mode servo amps do? -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
On 22 May 2012 19:28, Chris Radek ch...@timeguy.com wrote: It has just occurred to me that it might be possible to combine tacho and command voltages completely in the analogue domain for these machines? Isn't this exactly what velocity mode servo amps do? Almost certainly. But I just realised that you could do it outside the drive if you wanted to. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On 5/22/2012 1:10 PM, Andrew wrote: Hi everyone, I just ran into Intel DN2800MT mini-ITX motherboard. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dn2800mt.html It has HDMI, LVDS (can be useful for LCD panels), LPT header, two miniPCIe slots (SSD and wifi if necessary) and built-in PSU! (8-19V DC input required). PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Very thin board, all looks perfect. Costs $105. But the most important question is: Anyone tested the latency? Regards, Andrew -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Google: dn2800mt linux There seems to be video issues with this board. I really like the wide voltage range on the power supply input. That would be good for battery powered apps. Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
With all those big motors and hot chips flying off, keeping it cool might be a bigger issue! On 22 May 2012, at 12:52, andy pugh bodge...@gmail.com wrote: On 22 May 2012 11:30, Mark Wendt mark.we...@nrl.navy.mil wrote: I'd give my left you-know-what for a shop that size. It would be difficult to keep warm enough to work in. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On Tue, May 22, 2012 at 7:07 AM, charles green xxzzb...@yahoo.com wrote: a whole robot to swap tools: the prelude to an opera of the waking maintenace nightmare. Yep, that's right. ... Welcome to the wonderful world of high-$$ machines, where waiting for the maintenance guy costs more than putting another toy (automated tool changer in this case) into the system. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Power and data cables for CNC
On Tuesday, May 22, 2012 04:36:53 PM Jon Elson did opine: Rafael Skodlar wrote: Thank you very much for detailed advice to all of you that responded to my question. I received enough material to spend a few evenings doing my homework. It's much easier to start knowing what others have tried and what works in different circumstances. Using Cat-5 was a surprise to me as it's a bit stiff unless each wire is made of even smaller wires, not common in general use. There appear to be at least 3 kinds of Cat-5 cable. Solid wire is made for stringing in ceilings and walls, where it will never be moved. Some cables made for use from wall jack to computer, etc. have 7 strands, some for more frequent flexing have something like 31 strands. But, I really don't recommend Cat-5 at all for encoders. Only for encoders with differential outputs, and true differential inputs to the computer. For one thing, shielded Cat-5 cable is rare. In fact, I have never seen such a beast myself Jon. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene Q: How was Thomas J. Watson buried? A: 9 edge down. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT : large cnc
On 22 May 2012 21:33, Jack Coats j...@coats.org wrote: On Tue, May 22, 2012 at 7:07 AM, charles green xxzzb...@yahoo.com wrote: a whole robot to swap tools: the prelude to an opera of the waking maintenace nightmare. In the video it gets perilously close to smacking an expensive bit of live tooling into the tool change door. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On 5/22/2012 2:43 PM, Dave wrote: On 5/22/2012 1:10 PM, Andrew wrote: Hi everyone, I just ran into Intel DN2800MT mini-ITX motherboard. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dn2800mt.html It has HDMI, LVDS (can be useful for LCD panels), LPT header, two miniPCIe slots (SSD and wifi if necessary) and built-in PSU! (8-19V DC input required). PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Very thin board, all looks perfect. Costs $105. But the most important question is: Anyone tested the latency? Regards, Andrew -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Google: dn2800mt linux There seems to be video issues with this board. I really like the wide voltage range on the power supply input. That would be good for battery powered apps. Dave From the LogicSupply.com site: --- As of February 2012, due to driver limitations of the PowerVR graphics processing unit (GPU) core used in Intel’s Cedarview processors, operating system support is currently limited to Windows 7 and Windows 8 32-bit versions. While Ubuntu Linux 10.04 can be installed, functionality is limited and hardware graphics acceleration does not work. Because there are no drivers for the PowerVR graphics chip, the OS uses the generic VESA driver for X.org, thus Graphical User Interfaces still function, but users may experience sluggish performance, limited screen resolutions, video tearing, and playback for fullscreen or high-definition videos will stutter or freeze. There are no available drivers for Windows 7 64-bit operating systems. As a result, Logic Supply does not currently offer support for Windows 7 64-bit or Ubuntu Linux 10.04 installed on Cedarview boards or guarantee functionality of these operating systems on boards purchased by our customers. This restriction may change as newer driver updates are released, and we’ll do our best to stay on top of it. --- As ever, a new generation of cpu technology brings a new generation of problems. Note that earlier 32-bit Windows and all 64-bit Windows are excluded also, so it's not just Linux-fanboys they are diss'ing. The nettop market is lucrative but it sure is tough on the rest of us. Since I often run my boards with a remote X-server this GPU may not be an issue for me. Comparing the DN2800MT block diagram with that of the D525MW, I don't see great differences in the layout of the blocks. Both use the NM10 Express chip set and a W83627DHG-A based Legacy I/O controller (which drives the parallel port) although the brand name of this controller changed from Winbond to Nuvoton. The PS/2 keyboard/mouse ports have disappeared and they've reverted to an onboard parallel-port header (ala the D510MO). The loss of the PCI slot has already been mentioned. I don't like to count my chickens before they're hatched, but it looks like this board may be acceptable within the limits of PCIe. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On 22 May 2012 22:17, Kent A. Reed kentallanr...@gmail.com wrote: While Ubuntu Linux 10.04 can be installed, functionality is limited and hardware graphics acceleration does not work. Because there are no drivers for the PowerVR graphics chip, the OS uses the generic VESA driver for X.org, Software-OpenGL and Vesa graphics are both common suggestions for reducing latency problems, so that might actually be a plus for us, especially if the problems make them very cheap :-) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On Tue, May 22, 2012 at 5:19 PM, andy pugh bodge...@gmail.com wrote: Software-OpenGL and Vesa graphics are both common suggestions for reducing latency problems, so that might actually be a plus for us, especially if the problems make them very cheap :-) That's what I was thinking, although I doubt it's going to make the boards any cheaper. I really wish the chipmakers would give up on these crazy closed architectures, it seems counter-productive. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On 5/22/2012 5:19 PM, andy pugh wrote: On 22 May 2012 22:17, Kent A. Reedkentallanr...@gmail.com wrote: While Ubuntu Linux 10.04 can be installed, functionality is limited and hardware graphics acceleration does not work. Because there are no drivers for the PowerVR graphics chip, the OS uses the generic VESA driver for X.org, Software-OpenGL and Vesa graphics are both common suggestions for reducing latency problems, so that might actually be a plus for us, especially if the problems make them very cheap :-) True, True, and at these current board speeds they no longer feel like constraints. More important for me is the continued presence of a VGA port when I'm using the onboard graphics. I'm sure VGA will soon disappear altogether since most of the home theater crowd no longer has a need. Not a game stopper, just another irritant for those of us with antiquated hardware begging to be reused. Of course there's still the BIOS lying in wait. The DN2800MT BIOS has gone through 3 revisions already. So far, none of the issues that have been fixed look like they would affect us. At the risk of boring y'all, I'll quote Ronald Reagan once again Trust but verify. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for positionfeedback
I have a lathe and mill that I bought with Anilam controls, they get position from the Anilam DRO scales. The servos use tachometer feedback to the drive and the scales are connected to the control. These are stable even with backlash, I'm not saying backlash is good, just that the backlash doesn't cause oscillation problems. With backlash, I can knock the table 0.0005 out of position and the motor will turn slowly until the error is corrected, if I knock it out 0.001 the motor turns much faster to correct the error. The motor to drive seems to be a velocity loop and the control seems to put out a command proportional to the error. On the lathe I never got the original Anilam control to work so I converted it to EMC2. Same drives and everything, I just ran the position encoders into the EMC2 control and used P and I to get it running good. A little bit of I gain seemed to make up for offsets in the command, sometimes the servos can drift a little with 0V input and it can change with temperature. Anyway as long as the control is ON when I power up the drives, everything behaves properly. Roger Neal -Original Message- From: erik.555.gr...@gmail.com Sent: Tuesday, May 22, 2012 8:43 AM To: emc-users@lists.sourceforge.net Subject: [Emc-users] Servo system and glass encoder scales for positionfeedback Are there any major dis-advantages to using glass scales as position feedback for a servo system versus using encoders directly attached to the motors. I could see where backlash might be an issue but if using precision ground ballscrews -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On 5/22/2012 5:51 PM, Kent A. Reed wrote: On 5/22/2012 5:19 PM, andy pugh wrote: On 22 May 2012 22:17, Kent A. Reedkentallanr...@gmail.com wrote: While Ubuntu Linux 10.04 can be installed, functionality is limited and hardware graphics acceleration does not work. Because there are no drivers for the PowerVR graphics chip, the OS uses the generic VESA driver for X.org, Software-OpenGL and Vesa graphics are both common suggestions for reducing latency problems, so that might actually be a plus for us, especially if the problems make them very cheap :-) True, True, and at these current board speeds they no longer feel like constraints. More important for me is the continued presence of a VGA port when I'm using the onboard graphics. I'm sure VGA will soon disappear altogether since most of the home theater crowd no longer has a need. Not a game stopper, just another irritant for those of us with antiquated hardware begging to be reused. Of course there's still the BIOS lying in wait. The DN2800MT BIOS has gone through 3 revisions already. So far, none of the issues that have been fixed look like they would affect us. At the risk of boring y'all, I'll quote Ronald Reagan once again Trust but verify. Regards, Kent That board is really low power and the wide input range makes it perfect to run in a vehicle. That board is considerable cheaper than a D525 and a wide input range power supply. Intel is taunting me again... I think I need one. :-) Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On Wed, May 23, 2012 at 1:46 AM, Viesturs Lācis viesturs.la...@gmail.comwrote: PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Is there a PCIe-to-PCI adapter available? Anyone tested the latency? Latency _should_ be very good. But I doubt that I will buy this board as it has not pci slot. Viesturs, Maybe you could consider BeagleBone with Mesa's 7i43/USB board. I saw smooth stepper motion with above combination. As it's with USB interface, it could work with modern laptop or netbook. Yishin -- ARAIS ROBOT TECHNOLOGY www.araisrobo.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need Help from U.S. Users Companies - APT (Automatically Programmed Tools)
Matt Shaver wrote: I would also be interested in hearing from any people with experience in Fortran who would be interested in helping port this code to the Linux platform. If you could indicate your level of Fortran experience and any reasons for your interest in this code, that would be very helpful. Aug! I used to write a LOT of code in FORTRAN, and I know where the bodies are buried. Ie. the kinds of things in FORTRAN that cause endless trouble. The worst is having unmatching common blocks in different parts of the code. A compiler that permits something like the C include statement goes a long way toward preventing those. There are a few more things that either don't translate well or lead to other difficulties. There is an f2c converter program that might be useful. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo system and glass encoder scales for position feedback
Roland Jollivet wrote: Does this mean you can use lower resolution encoders on the motor, or should they be similar? If you had 1um resolution on the fixed linear scale, what linear resolution should the rotary encoder yield? It would probably be best if the rotary encoders had quite a bit higher resolution than the linear. 1 um on the linear is actually quite good, if the backlash between motor and linear movement is small, that may be all your need. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need Help from U.S. Users Companies - APT (Automatically Programmed Tools)
On Tue, 22 May 2012 21:44:23 -0500 Jon Elson el...@pico-systems.com wrote: Matt Shaver wrote: I would also be interested in hearing from any people with experience in Fortran who would be interested in helping port this code to the Linux platform. If you could indicate your level of Fortran experience and any reasons for your interest in this code, that would be very helpful. Aug! I used to write a LOT of code in FORTRAN, and I know where the bodies are buried. Ie. the kinds of things in FORTRAN that cause endless trouble. The worst is having unmatching common blocks in different parts of the code. A compiler that permits something like the C include statement goes a long way toward preventing those. There are a few more things that either don't translate well or lead to other difficulties. There is an f2c converter program that might be useful. Jon I'm hoping we can keep the entire thing in FORTRAN just because it is supposed to work there. I did my first FORTRAN compile in FORTAN II on a PDP-8 with paper tape and a KSR-33 but doesn't mean I remember much. Did a lot of FORTRAN on 360-67/HASP and Amdahl 390 but the former proviso still exists. Most were medium sized programs that relied on the Scientific Subroutine Package for their real functionality and that was = 30 years ago. Let's hope there are people out there that remember FORTRAN 77 and before. The real problem is not the code but people expert enough in APT to verify that things really work. It is easy to blame thing on the code that are simply not understanding how APT thinks. It is a major task to understand the underlying algorithms necessary to recode APT using the gsl libs. Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
Yishin- Do you actually have the Beaglebone running LinuxCNC? I know Jon Elson has been waiting for a very long time for someone to write an RTAI kernel for that platform. +++ We are like tenant farmers chopping down the fence around our house for fuel when we should be using Nature's inexhaustible sources of energy -- sun, wind and tide. ... I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that. -Thomas Edison, inventor (1847-1931) From: Yishin Li y...@araisrobo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Tuesday, May 22, 2012 8:39 PM Subject: Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star? On Wed, May 23, 2012 at 1:46 AM, Viesturs Lācis viesturs.la...@gmail.comwrote: PCIe slot is suitable for 6i25, which is probably very new, it's even not in MESA's price list, I guess the price is compatible to 5i25's. Is there a PCIe-to-PCI adapter available? Anyone tested the latency? Latency _should_ be very good. But I doubt that I will buy this board as it has not pci slot. Viesturs, Maybe you could consider BeagleBone with Mesa's 7i43/USB board. I saw smooth stepper motion with above combination. As it's with USB interface, it could work with modern laptop or netbook. Yishin -- ARAIS ROBOT TECHNOLOGY www.araisrobo.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On Wed, May 23, 2012 at 11:30 AM, Greg Bernard yankeelena2...@yahoo.comwrote: Yishin- Do you actually have the Beaglebone running LinuxCNC? I know Jon Elson has been waiting for a very long time for someone to write an RTAI kernel for that platform. Greg, Yes, we have LinuxCNC running with UbuntuLinux 12.04 armhf (hard-floating) on BeagleBone. The floating point performance is good for trajectory planning with 0.65ms period. As we moved the realtime time master from host into FPGA, we no longer need RTAI. We just need typical Ubuntu with USB support. Yishin -- ARAIS ROBOT TECHNOLOGY www.araisrobo.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Need Help from U.S. Users Companies - APT (Automatically Programmed Tools)
On Wed, May 23, 2012 at 3:44 AM, Jon Elson el...@pico-systems.com wrote: Matt Shaver wrote: I would also be interested in hearing from any people with experience in Fortran who would be interested in helping port this code to the Linux platform. If you could indicate your level of Fortran experience and any reasons for your interest in this code, that would be very helpful. Aug! I used to write a LOT of code in FORTRAN, and I know where the bodies are buried. Ie. the kinds of things in FORTRAN that cause endless trouble. The worst is having unmatching common blocks in different parts of the code. A compiler that I have spent a while trying to get the APT360 version 64bit compliant and have to agree about common block missmatch. This code does have unmatched common blocks in differing phases of the code which Im not sure f2c and gcc get right. permits something like the C include statement goes a long way toward preventing those. There are a few more things that either don't translate well or lead to other difficulties. There is an f2c converter program that might be useful. f2c has trouble with some of the evil constructs that APT uses these need fixing in the original code I think or hand fixing during conversion. I would love to run a diff between versions of the code base to see if these constructs are fixed later versions. One dirty hack Im seeing is saving space in an area of the common block by putting multiple flags in bytes/words without sensible comments. Dave Caroline (not in USA) -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] G04 dwell in seconds not milliseconds?
Hello, Just wondering if someone might know why LinuxCNC interprets the G04 dwell command parameter as seconds instead of milliseconds? I'm fairly certain most other machines (ie Fanuc and others) interpret the P value as milliseconds. For example, the command: G04 P3000 is interpreted by most machines as stop the tool for 3000 milliseconds (3 seconds). But LinuxCNC interprets this as 3000 seconds. Also, I think the G04 command should take X or P (or possibly U), where the X value is normally in seconds and the P value is normally milliseconds. LinuxCNC does not allow X values and will throw an error if it encounters one. If anyone can clear this up I would be grateful. I'm writing an extension for Inkscape that generates G code and I'd like to make sure that its output is nominally correct. thanks, - Claude P.S. I'm using LinuxCNC to control an old Fletcher F6100 CNC mat cutter that has a tangential knife (a fourth axis that rotates about the Z axis that is always tangent to the direction of travel along the X and Y axes) -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Intel DN2800MT - possible new LinuxCNC star?
On Tue, May 22, 2012 at 8:50 PM, Yishin Li y...@araisrobo.com wrote: Yes, we have LinuxCNC running with UbuntuLinux 12.04 armhf (hard-floating) on BeagleBone. ... Yishin, That is fantastic! Any chance you will release a public distribution of your port of LinuxCNC to the BeagleBone (with some instructions on how to build it)? thanks, - Claude -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
