Re: [Emc-users] Brushless Servo Selection?
2012/6/13 Todd Zuercher to...@pgrahamdunn.com: I was thinking of picking up some AMC servo drives off ebay (BE12A6 drives seem to be cheep and plentiful there). Mesa 8i20 is cheaper, do not know about Pico drives. And paired with KL34BLS-98 ($134/pcs) servo motor it should be a good match: motor has peak current of 33A (and more than 4Nm torque there): http://kelinginc.net/34BLMotor.pdf The drive will handle up to 30A. What do others think of this combination? I was thinking about using them this way. Unfortunately it requires relatively larger power supply with higher current output. OTOH I suspect that commanded acceleration limits will have impact on how much torque is drawn from motor and thus how much current will it need. But that is just my own speculation... What would be a good motor for this and where to buy them? (Max RPM will be less than 1500 without changing gearing, with 1000 being more realistic.) I think that with servos You can easily expect much higher RPM. That Keling, for example, is rated for 3000 RPM. How high of a resolution encoder will I need? I think that generally it would be - the more resolution, the easier tuning and better positional accuracy. The card that counts those pulses is the limiting factor. If the motor can do 3000 RPM = 50 rps, then 1024 cpr encoder will give 4096 ppr = 204800 pps. That is not even close to those few MHz counting rates I have seen for FPGA cards. Short of cobbling together all this stuff for a closed loop system, I am also considering buying a 4 axis servo system from DMM-Tech (costs about $1700) and running Linuxcnc open loop. (probably still use the 5i25 for hardware step generation). And for LinuxCNC You still would have the same open-loop step-dir system... IMHO doing it that way loses at least 75% of the reason, why would one better use servos instead of steppers. 1700$? 4 Keling motors would be 536 $, 4 8i20s would be 960 $ = 1496 $ total... Add the cost of wiring and it would be somewhere there. The whole difference is in the degree of control You have. -- 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] Interesting tool changer
On 15 June 2012 04:28, charles green xxzzb...@yahoo.com wrote: it is not a tool changer, it is a spindle changer. there is probably a gear mechansim somewhere in the middle of the carousel that engages whichever spindle is pointing at the table to a single spindle motor. I did wonder if that was the case, but rejected the idea as being too expensive and likely to lack rigidity. I designed an almost-identical system for a bond tester once (one motor and skew-gears on the selected tool) but that was a very different application. That does remind me of a tiny encoder that I designed for the same machine. We machined two eccentrics at 90 degrees on the shaft (two flats might also work) and then had two leds and detectors that were occluded by the eccentrics. It was possible to deduce shaft angle from the relative intensities. The whole thing was in a 6mm housing round a 4mm shaft. -- 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] quick boot
On 15 June 2012 01:54, Stuart Stevenson stus...@gmail.com wrote: I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. I was meaning open rather than Open inasmuch as OEM ECUs in most vehicles are locked down very tightly and won't even function outside their paired vehicle. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. What is the application? I think that an Arduino would be adequate to control spark-only on a carburated engine. Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. (which will typically have about 3000 look-up tables, 40,000 other variables and a manual 4000 pages thick) In case you have missed it, I program engine control computers for a living. MegaSquirt seems pretty Open. The code is in assembler, but is available. http://www.megasquirt.info/ -- 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] Interesting tool changer
huzza --- On Fri, 6/15/12, andy pugh bodge...@gmail.com wrote: From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Interesting tool changer To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Friday, June 15, 2012, 2:01 AM On 15 June 2012 04:28, charles green xxzzb...@yahoo.com wrote: it is not a tool changer, it is a spindle changer. there is probably a gear mechansim somewhere in the middle of the carousel that engages whichever spindle is pointing at the table to a single spindle motor. I did wonder if that was the case, but rejected the idea as being too expensive and likely to lack rigidity. I designed an almost-identical system for a bond tester once (one motor and skew-gears on the selected tool) but that was a very different application. That does remind me of a tiny encoder that I designed for the same machine. We machined two eccentrics at 90 degrees on the shaft (two flats might also work) and then had two leds and detectors that were occluded by the eccentrics. It was possible to deduce shaft angle from the relative intensities. The whole thing was in a 6mm housing round a 4mm shaft. -- 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] Brushless Servo Selection?
On 15 June 2012 06:58, Viesturs Lācis viesturs.la...@gmail.com wrote: Unfortunately it requires relatively larger power supply with higher current output. This is a problem with motors like the Keling ones, with a 48V rated voltage. It is far simpler to make a 300V PSU than a 48V one. Simply rectifying mains voltage into a big capacitor makes a PSU that the 8i20 is happy with. Those Keling motors have a 500V / 1 min rating. I don't know if that meas that they can run indefinitley on a 300V PWM (with a 48V average or not). In the US I suppose a rectified-mains PSU would be around 150V which sounds more reasonable. (only 3x rated voltage, and it is conventional to run steppers at that sort of overvoltage) -- 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] Brushless Servo Selection?
That is what I was thinking, the existing motors are quite old and are probably not as strong as they should be either, so if I am buying new drives and motors anyway, I thought switching to servos would be a good idea, especially since I would need to get some sort of hardware step generation to make use of a microstepping drive. Todd Zuercher P. Graham Dunn Inc. 630 Henry Street Dalton, Ohio 44618 Phone: (330)828-2105ext. 2031 -- P. Graham Dunn Phone: 330-828-2105 E-mail: to...@pgrahamdunn.com 630 Henry St. Dalton, OH 44618 www.pgrahamdunn.com -Original Message- From: Jon Elson [mailto:el...@pico-systems.com] Sent: Thursday, June 14, 2012 10:33 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Brushless Servo Selection? cogoman wrote: 450 Oz-in. steppers are pretty hefty devices. I followed the link to the Keling website, and the heftiest motor they listed was a maximum of 6.3N.m, which I assume (correct me if I'm wrong) means Newton-Meters. The conversion calculator I used gave me 56 inch pounds, a little more than a tenth of the torque your steppers should be able to put out. If you get outright stalls with 450 inch pounds, you will more often get outright stalls with 56 inch pounds. If you are missing steps, it's probably not the motors' faults. Something else is probably at work here. Thats inch-POUNDS! 16 times inch-Ounces. 56 In-Lb is 896 Oz-In, so you have made a mistake. Also, steppers, ESPECIALLY with non-microstepping drives, are susceptible to timing variations and resonance issues. If you used a hardware step pulse generator and microstepping drives such as the Gecko 201 or 203 drive, you probably would get rid of the errors. At 1000 RPM, all reasonable steppers have lost significant torque from their holding torque rating. But, for peace of mind, and since you would need to replace the drives anyway to go with microstepping ones, you might as well go the servo route. It isn't that much more expensive. 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] quick boot
On 6/15/2012 5:29 AM, andy pugh wrote: On 15 June 2012 01:54, Stuart Stevensonstus...@gmail.com wrote: I have not seen a car with open ECU software. There is always something *NOT * open even with an aftermarket configurable system. I was meaning open rather than Open inasmuch as OEM ECUs in most vehicles are locked down very tightly and won't even function outside their paired vehicle. Part of the point of the exercise is to have LinuxCNC controlling the motor and other functions. What is the application? I think that an Arduino would be adequate to control spark-only on a carburated engine. Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. (which will typically have about 3000 look-up tables, 40,000 other variables and a manual 4000 pages thick) In case you have missed it, I program engine control computers for a living. MegaSquirt seems pretty Open. The code is in assembler, but is available. http://www.megasquirt.info/ Conversely a three-core 1MHz PowerPC chip is running at about 80% CPU load on a modern common-rail diesel engine. Did you mean 1 ghz? 80% CPU load on a modern common-rail diesel engine. Like the super duty 6.7? ;-) 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] quick boot
Mark Cason wrote: Modern fuel injectors, are basically mini electric fuel pumps, and run non-stop. They run off of a PWM signal, which is altered, based on what the Oxygen (O2) sensors, and the Mass AirFlow sensor (MAF), are telling it. On every 4 cylinder engine that I've worked on (Esp. from the 90's), all the fuel injector operated off of the same PWM signal, which simplified things considerably. The main proponent for doing it that way, is that O2 sensors can only tell that the exhaust stream is running either lean, or rich. They can't really tell WHICH cylinder is causing the problem. I ran the full internal diagnostic scan on a Ford 6-cyl engine some years ago, and was amazed at the built-in diagnositcs of the system. That car had separate injection for each cylinder, and so they cut off one cylinder at a time to check injector balance (reading RPM dip and oxygen sensor changes), and then cut off one bank at a time to check variations between the Oxygen sensors. It was quite cool! Yes, a number of 4-cyl engines do things a bit simpler to save ECU hardware. 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] Brushless Servo Selection?
On Fri, 2012-06-15 at 10:53 +0100, andy pugh wrote: On 15 June 2012 06:58, Viesturs Lācis viesturs.la...@gmail.com wrote: Unfortunately it requires relatively larger power supply with higher current output. This is a problem with motors like the Keling ones, with a 48V rated voltage. It is far simpler to make a 300V PSU than a 48V one. Simply rectifying mains voltage into a big capacitor makes a PSU that the 8i20 is happy with. Those Keling motors have a 500V / 1 min rating. I don't know if that meas that they can run indefinitley on a 300V PWM (with a 48V average or not). In the US I suppose a rectified-mains PSU would be around 150V which sounds more reasonable. (only 3x rated voltage, and it is conventional to run steppers at that sort of overvoltage) 48 Volts or rather -48 Volts DC is common for telephone equipment, so there may be cheap supplies available, if one knows where to look. Building an Antek supply shouldn't be too expensive, but I haven't checked prices recently. http://www.antekinc.com/index.php http://www.antekinc.com/gview.php One could make a transformer for the needed voltage, like these guys did. http://mackys.livejournal.com/838591.html Brushed motors (and drives) might be cheaper and universal motors are usually wound for mains voltage. If they can be modified for permanent magnets, universal motors could be handy. http://www.supermagnetman.net/index.php?cPath=37page=3 For most of us, brushes wear well enough to not be a maintenance problem. Scrap yards should have a large supply of vacuum cleaner motors from people that don't know how to replace a rubber belt. Another thing I haven't had time to look into is using a Delon doubler when one needs higher voltage than what is at hand. http://en.wikipedia.org/wiki/File:Bridge_voltage_doubler.svg http://en.wikipedia.org/wiki/Voltage_doubler -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, 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
Re: [Emc-users] Brushless Servo Selection?
2012/6/15 andy pugh bodge...@gmail.com: On 15 June 2012 06:58, Viesturs Lācis viesturs.la...@gmail.com wrote: Unfortunately it requires relatively larger power supply with higher current output. This is a problem with motors like the Keling ones, with a 48V rated voltage. It is far simpler to make a 300V PSU than a 48V one. Simply rectifying mains voltage into a big capacitor makes a PSU that the 8i20 is happy with. Yes, I even have servos with 330V rated voltage, but they are too small current-wise for 8i20. Those Keling motors have a 500V / 1 min rating. I don't know if that meas that they can run indefinitley on a 300V PWM (with a 48V average or not). In the US I suppose a rectified-mains PSU would be around 150V which sounds more reasonable. Hmm, this sounds tempting, I can get 1 kW transformer not very expensive with something like 42 VAC output, rectifying that will give something close to 60 VDC... What are the risks, when brushless servos are ran on overvoltage supply? Will they just be warming, which I think is tolerable or is it a nice way to damage them? 3x rated voltage, and it is conventional to run steppers at that sort of overvoltage Those Nema 23 steppers that I have used are rated at 5,46 VDC for with windings connected in series for bipolar drive, I am running them with 28 VDC in one machine and 48 VDC in welding robot, so that is getting close to 10x overvoltage. But what about brushless servos? Has anyone tried that and gained some experience to share? -- 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] Brushless Servo Selection?
Am 15.06.2012 19:58, schrieb Viesturs Lācis: 2012/6/15 Kirk Wallace kwall...@wallacecompany.com: Building an Antek supply shouldn't be too expensive, but I haven't checked prices recently. http://www.antekinc.com/index.php http://www.antekinc.com/gview.php Thanks for the links! 155$ is little more that I would like, especially if it is a shipment from US - add 22% VAT and also shipping cost... But I still got interested to find out, so I looked at this one: http://www.antekinc.com/details.php?p=146 It is rated for 23,4 A and has 4 outputs. A noob question: Is it meant to be able to handle 23,4 A on each of the 4 outputs at the same time? The datasheet shows that it has two 32V and one 18V and one 12V output (Makes in total 4). On each of the 32V lines you can have up to 23.4A and both other 2A. Ciao, Rainer -- 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] Brushless Servo Selection?
On 15 June 2012 18:40, Kirk Wallace kwall...@wallacecompany.com wrote: Another thing I haven't had time to look into is using a Delon doubler when one needs higher voltage than what is at hand. http://en.wikipedia.org/wiki/File:Bridge_voltage_doubler.svg http://en.wikipedia.org/wiki/Voltage_doubler Yes, I built a doubler (the aim was to connect it to an Arduino and IRAMS module to make a step-up 3-phase fixed-frequency drive to run the motor in my milling machine. I looked at the dot-board in front of me, with 730V DC on it and got scared, and didn't pursue the idea any further. -- 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
[Emc-users] disabling a stepper motor between moves?
I've been working to create some integration between the reprap RAMPS stepper driver board and LinuxCNC. One interesting thing some 3D printers do is disable the Z stepper motor when it is not moving. This relies on the friction of the Z axis assembly for keeping the head in place, but allows hand-adjustment of that axis while the machine is in motion, for instance when starting a print. In fact a popular part to print is a small hand wheel for the Z axis to adjust it. Putting the question of if this is a good or bad thing aside for a moment, I'm wondering if anyone has any ideas about how this would be done with LinuxCNC. Somewhat complicating things is that stepper drivers typically have an enable delay, so that would likely need to be respected, presumably by the motion component prior to moving the axis. Thoughts on this interesting problem? Thanks, Scott -- 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] disabling a stepper motor between moves?
On 15 June 2012 22:03, Scott Hasse scott.ha...@gmail.com wrote: Putting the question of if this is a good or bad thing aside for a moment, I'm wondering if anyone has any ideas about how this would be done with LinuxCNC. If you work your way through this thread, I came up with a comp for the job eventually: http://thread.gmane.org/gmane.linux.distributions.emc.user/26042/focus=26105 -- 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] quick boot
Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. thanks Stuart -- dos centavos -- 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] Calling files
I can't get the Calling Files feature to work in 2.5 I have placed the file containing the subroutine in the directory named in PROGRAM_PREFIX in the .ini file, but the programme says it can't load the subroutine. I would welcome all suggestions. I couldn't get this to work in earlier versions either, and I note that others couldn't get this to work in earlier versions either. Does it work in 2.5? Or am I just doing something wrong? Regards, HomeShopper -- 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] Brushless Servo Selection?
On 06/14/2012 10:33 PM, Jon Elson wrote: Thats inch-POUNDS! 16 times inch-Ounces. 56 In-Lb is 896 Oz-In, so you have made a mistake. Also, steppers, ESPECIALLY Thanks. I don't have an intuitive feeling for N-m measures, so for quite a while I have been making this mistake in my head. I had wondered why the motors Keling sells were so popular, but so weak. Now I know better. 8-) -- 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] Calling files
Works great for me in 2.5. Please post the relevant part of your .ini file, an ls -l in the relevant directory, and the exact gcode command you run to call the file. On Jun 15, 2012, at 16:16 , Marcus Bowman wrote: I can't get the Calling Files feature to work in 2.5 I have placed the file containing the subroutine in the directory named in PROGRAM_PREFIX in the .ini file, but the programme says it can't load the subroutine. I would welcome all suggestions. I couldn't get this to work in earlier versions either, and I note that others couldn't get this to work in earlier versions either. Does it work in 2.5? Or am I just doing something wrong? Regards, HomeShopper -- 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 -- Sebastian Kuzminsky -- 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] Brushless Servo Selection?
On 15 June 2012 23:40, cogoman cogo...@optimum.net wrote: Thanks. I don't have an intuitive feeling for N-m measures, As a comparison, the triple stack NEMA 23 steppers are up to 3Nm. -- 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] Calling files
On 15 June 2012 23:16, Marcus Bowman marcus.thebowm...@virgin.net wrote: I can't get the Calling Files feature to work in 2.5 I have placed the file containing the subroutine in the directory named in PROGRAM_PREFIX in the .ini file, but the programme says it can't load the subroutine. I would welcome all suggestions. I couldn't get this to work in earlier versions either, and I note that others couldn't get this to work in earlier versions either. Does it work in 2.5? Or am I just doing something wrong? One unexpected quirk recently spotted by JT is that if you don't have a G-code file loaded (such as the default splash screen), then subroutine calling is different and broken in a manner of which the details I have forgotten. So, as a test, load a file (any file) and try again? -- 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] Calling files
Marcus, In 2.5 you want to use SUBROUTINE_PATH. See: http://www.linuxcnc.org/docs/devel/html/config/ini_config.html#sub:[RS274NGC ]-section It works in 2.5, but not before. Regards, Eric I can't get the Calling Files feature to work in 2.5 I have placed the file containing the subroutine in the directory named in PROGRAM_PREFIX in the .ini file, but the programme says it can't load the subroutine. I would welcome all suggestions. I couldn't get this to work in earlier versions either, and I note that others couldn't get this to work in earlier versions either. Does it work in 2.5? Or am I just doing something wrong? Regards, -- 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] Brushless Servo Selection?
There are about 1.3 Nm to a ft-lb. N. Christopher Perry On Jun 15, 2012, at 18:40, cogoman cogo...@optimum.net wrote: On 06/14/2012 10:33 PM, Jon Elson wrote: Thats inch-POUNDS! 16 times inch-Ounces. 56 In-Lb is 896 Oz-In, so you have made a mistake. Also, steppers, ESPECIALLY Thanks. I don't have an intuitive feeling for N-m measures, so for quite a while I have been making this mistake in my head. I had wondered why the motors Keling sells were so popular, but so weak. Now I know better. 8-) -- 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] Brushless Servo Selection?
On 16 June 2012 00:37, N. Christopher Perry n_christopher_pe...@me.com wrote: There are about 1.3 Nm to a ft-lb. Which would reduce confusion no end, except motor manufacturers want bigger numbers, so like to use oz-inch in the US. There was a similar tendency in the metric world, but it seems to have passed. You do occasionally see motors with peculiar units, my dad has one with (I think) kilo-dyne-metres on the rating plate. (that's about 100 x Nm, ie 1 kdm = 0.01Nm) -- 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] Calling files
On Friday, June 15, 2012 09:05:34 PM Sebastian Kuzminsky did opine: Works great for me in 2.5. Please post the relevant part of your .ini file, an ls -l in the relevant directory, and the exact gcode command you run to call the file. I found that common sense seemed to apply; The subroutine in the file must be identical to the filename, but the filename needs an '.ngc' appended. Then it just worked for me. My only fuss has to do with the machine apparently being run by a zombie while the subroutine file is executing, it does not show in the code window at all. On Jun 15, 2012, at 16:16 , Marcus Bowman wrote: I can't get the Calling Files feature to work in 2.5 I have placed the file containing the subroutine in the directory named in PROGRAM_PREFIX in the .ini file, but the programme says it can't load the subroutine. I would welcome all suggestions. I couldn't get this to work in earlier versions either, and I note that others couldn't get this to work in earlier versions either. Does it work in 2.5? Or am I just doing something wrong? Regards, HomeShopper -- 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 Don't drop acid, take it pass-fail! -- Bryan Michael Wendt -- 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] quick boot
Considering this is a development, I'd go with what we know works well, an Intel D525MW. That way you have the full array of other supported hardware that is also proven. Use that with a Mini-box wide input range power supply that survives engine cranks and you are on your way. The have a power supply card that is about $90 and it will supply over 200 watts of power while surviving the low battery voltages that occur when cranking the engine. It has sufficient power on the +12 volt and +5 volt lines to maintain the control power to the accessory cards and sensors during engine cranking, which will be very important (I think). I have one of those power supply cards and it works exactly as advertised. Once you get the software working, you can optimize the hardware, if so desired. Do you know how much voltage and drive current you need to trigger your fuel injectors? Sounds like a fun project. Dave On 6/15/2012 5:51 PM, Stuart Stevenson wrote: Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. thanks Stuart -- 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] quick boot
On 16 June 2012 03:08, Dave e...@dc9.tzo.com wrote: Use that with a Mini-box wide input range power supply that survives engine cranks You need to keep alive down to 7V in an automotive context. (well, at least to hit the -30C sign-off). As has been said, this sounds like an interesting project. I would like to help, and might have relevant knowledge. What is the engine, and why? -- 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] quick boot
Stuart Stevenson wrote: Gentlemen, I don't know for sure where it will lead but I have the mind set to use LinuxCNC for the entire motor and peripheral systems. I don't know if it will be one processor or more. Given that condition, let's address the motor ECU Does anyone have a suggestion for a board and chip set. Well, the Atom boards can be set up with a 12 V power supply, including ones designed to handle the voltage dip when starting. Since these things are used as car computers, there should at least be some info on how they handle wide temperature ranges. Then, if I was to get into such a project, I'd definitely want to get into FPGA programming, you can assemble all sorts of functions PWM, step pulses, encoder readers, counter/timer into one chip. But, there is a serious learning curve involved. And, NO, I am NOT volunteering! 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] Brushless Servo Selection?
On 15.06.12 10:40, Kirk Wallace wrote: On Fri, 2012-06-15 at 10:53 +0100, andy pugh wrote: This is a problem with motors like the Keling ones, with a 48V rated voltage. It is far simpler to make a 300V PSU than a 48V one. Simply rectifying mains voltage into a big capacitor makes a PSU that the 8i20 is happy with. ... 48 Volts or rather -48 Volts DC is common for telephone equipment, so there may be cheap supplies available, if one knows where to look. Have to concur, and yes, being in the right place at the right time is what secured one for me. There is a bonus though, voltage-wise. The -48 Volts DC in telephone exchanges comes from big battery banks, so the power supplies are usually hefty battery chargers, and will put out at least 60v to boost charge the batteries. The small one (2x2x1 ft) I collared does 65v (Boost), 54v (Float2), and 52.8v (Float1) at 20A. The only thing is there won't be filter caps in there, I expect. The SMPS designs produced by the hardware-only team, during my several decades in telecoms transmission systems design, had to cope with the 65v for a limited time, and the float voltage indefinitely. I don't know how hot the charger would get after an extended time on Boost at 20A, e.g. if it were used for a 1.3 kW spindle supply. Erik -- Wisdom is one of the few things that looks bigger the further away it is. - Terry Pratchett, _Witches Abroad_ -- 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
