Re: [Emc-users] stepper power supply
On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did opine: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard Love it, Richard. I have been meaning to get me one of those critters myself. Could you elaborate on the size of the motors and the PSU's output voltage? 1 - Probotix 40VDC 10Amp Linear Power Supply, no manual 3 - http://www.probotix.com/index.php?view=productpath=14product_id=51 # 280 Oz In. Hybrid # 1.8 /200 Steps Per Rev. # 3 Amps Current Per Phase (Uni-polar) # 8-wire Uni-polar or Bi-polar # NEMA 23 Frame 1 - Pacific Scientific Powermax II stepper model P21NRXA-LNF-NS-00 http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf 200 steps per rev 2.8 amps 8-wire -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 10:08:23 AM kqt4a...@gmail.com did opine: On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did opine: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard Love it, Richard. I have been meaning to get me one of those critters myself. Could you elaborate on the size of the motors and the PSU's output voltage? 1 - Probotix 40VDC 10Amp Linear Power Supply, no manual And linear is not as efficient, but far more tolerant of surges. What did they want for it? $85.95 It was an upgrade when I bought a V90 I'm currently running on a 28 volt switcher good for 12.5 amps if actively cooled. 42 volt rated drivers, so I would like to locate a higher voltage (36?)supply. OTOH, I've only $30 from All Electronics in this one, which also has 5 and 12 volt outputs at logic circuit currents. They are live full time but the main output is switchable, medical grade stuffs they claim. 3 - http://www.probotix.com/index.php?view=productpath=14product_id=51 # 280 Oz In. Hybrid # 1.8 /200 Steps Per Rev. # 3 Amps Current Per Phase (Uni-polar) # 8-wire Uni-polar or Bi-polar # NEMA 23 Frame 262's, 4 wire for XYA, 425 on Z, 8 wire used as 4. 1 - Pacific Scientific Powermax II stepper model P21NRXA-LNF-NS-00 http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf 200 steps per rev 2.8 amps 8-wire I think the 28 volts is making the MM-542's run warmer, so a 36 would be better. Running at 2.4 amps, could raise that 1 notch I think. 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 Conquering Russia should be done steppe by steppe. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On Thursday, December 29, 2011 01:36:19 PM Clint Washburn did opine: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI_C ircu it_Breakers_Transformershash=item19b10ad81d Yes, but I have to ask why? You already have 127vac with one leg grounded, the std voltage here, just by plugging whatever into the nearest duplex socket on the wall. How many amps does this pull? 15 for a normal duplex, twenty for the inline slot version that has 10 guage in the wall, beyond that you would need to have another branch circuit installed. 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 In good speaking, should not the mind of the speaker know the truth of the matter about which he is to speak? -- Plato -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thursday, December 29, 2011 09:13:26 AM Ed Nisley did opine: On Wed, 2011-12-28 at 12:03 -0500, gene heskett wrote: There are hall effect based ammeters A while back, I mooched a Tek Hall-effect current probe from my buddy Eks to take some interesting pix: http://softsolder.com/2011/06/20/stepper-sync-wheel-current-waveform-fir st-light/ http://softsolder.com/2011/06/27/stepper-motor-winding-current-rise-tim e/ The winding current stays within a skosh of the setpoint for each microstep, which the driver determines by applying the sine cosine of the microstep (electrical) angle to the overall peak current setpoint. That may also contribute to the mystical 70% derating factor, because in full-step mode the driver (well, Allegro drivers, anyway) applies 1/sqrt(2) = 0.71 of the peak current setpoint to *each* winding. That keeps the overall motor power dissipation the same, but the total current into both windings is 2*(1/sqrt(2))*peak = 1.4*peak. Perhaps the person who first stated that factor, back in the dim past, forgot about the current in the *other* winding? While I was doing that, I managed to stoke a mechanical resonance that back-drove the winding current something awful: http://softsolder.com/2011/09/12/stepper-dynamometer-mechanical-resonanc e/ Keeps me off the streets at night... [grin] Thanks Ed. As usual, to the point on several subjects. 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 Ask not for whom the telephone bell tolls... if thou art in the bathtub, it tolls for thee. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On 12/29/2011 11:54 AM, Clint Washburn wrote: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI_Circu it_Breakers_Transformershash=item19b10ad81d -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users This one looks even better: http://www.ebay.com/itm/T2-53012-S-Acme-2-KVA-single-phase-480-240-240-120-/120827631848?pt=BI_Circuit_Breakers_Transformershash=item1c21e358e8 -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thursday, December 29, 2011 10:08:23 AM kqt4a...@gmail.com did opine: On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did opine: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard Love it, Richard. I have been meaning to get me one of those critters myself. Could you elaborate on the size of the motors and the PSU's output voltage? 1 - Probotix 40VDC 10Amp Linear Power Supply, no manual And linear is not as efficient, but far more tolerant of surges. What did they want for it? I'm currently running on a 28 volt switcher good for 12.5 amps if actively cooled. 42 volt rated drivers, so I would like to locate a higher voltage (36?)supply. OTOH, I've only $30 from All Electronics in this one, which also has 5 and 12 volt outputs at logic circuit currents. They are live full time but the main output is switchable, medical grade stuffs they claim. 3 - http://www.probotix.com/index.php?view=productpath=14product_id=51 # 280 Oz In. Hybrid # 1.8 /200 Steps Per Rev. # 3 Amps Current Per Phase (Uni-polar) # 8-wire Uni-polar or Bi-polar # NEMA 23 Frame 262's, 4 wire for XYA, 425 on Z, 8 wire used as 4. 1 - Pacific Scientific Powermax II stepper model P21NRXA-LNF-NS-00 http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf 200 steps per rev 2.8 amps 8-wire I think the 28 volts is making the MM-542's run warmer, so a 36 would be better. Running at 2.4 amps, could raise that 1 notch I think. 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 Conquering Russia should be done steppe by steppe. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On 12/29/2011 11:54 AM, Clint Washburn wrote: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI_Circu it_Breakers_Transformershash=item19b10ad81d -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users That should work. That is pretty big. Should be good for about 20 amps at 110-120 volts.. That is a good price for a new transformer. Keep in mind that transformer is designed to go into a metal cabinet or housing. It might be cheaper to find an enclosed transformer with at least a Nema 1 rating so you don't have to supply a box /enclosure for the transformer. Enclosed - meaning something like this: http://www.ebay.com/itm/Transformer-Topaz-2kva-120-280-240-480-/150724107566?pt=BI_Circuit_Breakers_Transformershash=item2317db5d2e Dave -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Transformer Question
What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI_Circu it_Breakers_Transformershash=item19b10ad81d -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thursday, December 29, 2011 01:10:20 PM kqt4a...@gmail.com did opine: On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 10:08:23 AM kqt4a...@gmail.com did opine: On Thu, 29 Dec 2011, gene heskett wrote: On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did opine: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard Love it, Richard. I have been meaning to get me one of those critters myself. Could you elaborate on the size of the motors and the PSU's output voltage? 1 - Probotix 40VDC 10Amp Linear Power Supply, no manual And linear is not as efficient, but far more tolerant of surges. What did they want for it? $85.95 It was an upgrade when I bought a V90 That would make me search my junk box. It is also a bit close to the 42 volt rating of my new drivers. Rich is not on of the bennies of being retired, darnit. In fact, I may have something I can use now that I think about it. I believe the supplies I use in series for EDM when I need to, could be paralleled as the 2 in series make about 80 volts, which when used for EDM, with a 25 ohm limiter and a 10 UF capacitor, work very well but sent me to the truck for my rifle range muffs, as it is ring your ears noisy. Now if I can just recall where I got them from because I don't want to tear that rig off the wall. I hate it when that happens. :( I'm currently running on a 28 volt switcher good for 12.5 amps if actively cooled. 42 volt rated drivers, so I would like to locate a higher voltage (36?)supply. OTOH, I've only $30 from All Electronics in this one, which also has 5 and 12 volt outputs at logic circuit currents. They are live full time but the main output is switchable, medical grade stuffs they claim. 3 - http://www.probotix.com/index.php?view=productpath=14product_id=51 # 280 Oz In. Hybrid # 1.8 /200 Steps Per Rev. # 3 Amps Current Per Phase (Uni-polar) # 8-wire Uni-polar or Bi-polar # NEMA 23 Frame 262's, 4 wire for XYA, 425 on Z, 8 wire used as 4. 1 - Pacific Scientific Powermax II stepper model P21NRXA-LNF-NS-00 http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf 200 steps per rev 2.8 amps 8-wire I think the 28 volts is making the MM-542's run warmer, so a 36 would be better. Running at 2.4 amps, could raise that 1 notch I think. Cheers, Gene -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ 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 Why be difficult when, with a bit of effort, you could be impossible? -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Wed, 2011-12-28 at 12:03 -0500, gene heskett wrote: There are hall effect based ammeters A while back, I mooched a Tek Hall-effect current probe from my buddy Eks to take some interesting pix: http://softsolder.com/2011/06/20/stepper-sync-wheel-current-waveform-first-light/ http://softsolder.com/2011/06/27/stepper-motor-winding-current-rise-time/ The winding current stays within a skosh of the setpoint for each microstep, which the driver determines by applying the sine cosine of the microstep (electrical) angle to the overall peak current setpoint. That may also contribute to the mystical 70% derating factor, because in full-step mode the driver (well, Allegro drivers, anyway) applies 1/sqrt(2) = 0.71 of the peak current setpoint to *each* winding. That keeps the overall motor power dissipation the same, but the total current into both windings is 2*(1/sqrt(2))*peak = 1.4*peak. Perhaps the person who first stated that factor, back in the dim past, forgot about the current in the *other* winding? While I was doing that, I managed to stoke a mechanical resonance that back-drove the winding current something awful: http://softsolder.com/2011/09/12/stepper-dynamometer-mechanical-resonance/ Keeps me off the streets at night... [grin] -- Ed http://softsolder.com -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
kqt4a...@gmail.com wrote: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Yes, that's 220 W, not counting for power factor effects! So many people VASTLY overspecify the transformer, it is laughable! You see these guys with desktop mills with multi-KW power supplies. Jon -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did opine: Just in case y'all run out of something to ponder I do not have one of those fancy meters Gene mentioned but I do have a Kill-A-Watt 118.7 volts ac 3 motors at rest - 1.15 amps 3 motors running - 1.6 amps 4 motors at rest - 1.43 amps 4 motors running - 1.85 amps This is killing my electric bill :) Richard Love it, Richard. I have been meaning to get me one of those critters myself. Could you elaborate on the size of the motors and the PSU's output voltage? 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 Come on over here, baby, I want to do a thing with you. - A Cop, arresting a non-groovy person after the revolution, Firesign Theater -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. My main question is given the type of transformer I was not sure how the transformer performs with two hot legs as opposed to one hot and one neutral. I am having a hard time finding a refrence to explain it to me. -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Thursday, December 29, 2011 10:42 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Transformer Question On Thursday, December 29, 2011 01:36:19 PM Clint Washburn did opine: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI _C ircu it_Breakers_Transformershash=item19b10ad81d Yes, but I have to ask why? You already have 127vac with one leg grounded, the std voltage here, just by plugging whatever into the nearest duplex socket on the wall. How many amps does this pull? 15 for a normal duplex, twenty for the inline slot version that has 10 guage in the wall, beyond that you would need to have another branch circuit installed. 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 In good speaking, should not the mind of the speaker know the truth of the matter about which he is to speak? -- Plato -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
I plan to have it in an enclosure. I am in the process of figuring out components for the power suppply for my DC servos. -Original Message- From: Dave [mailto:e...@dc9.tzo.com] Sent: Thursday, December 29, 2011 10:20 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Transformer Question On 12/29/2011 11:54 AM, Clint Washburn wrote: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI _Circu it_Breakers_Transformershash=item19b10ad81d -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users That should work. That is pretty big. Should be good for about 20 amps at 110-120 volts.. That is a good price for a new transformer. Keep in mind that transformer is designed to go into a metal cabinet or housing. It might be cheaper to find an enclosed transformer with at least a Nema 1 rating so you don't have to supply a box /enclosure for the transformer. Enclosed - meaning something like this: http://www.ebay.com/itm/Transformer-Topaz-2kva-120-280-240-480-/150724107566 ?pt=BI_Circuit_Breakers_Transformershash=item2317db5d2e Dave -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
As Gene already mentioned, why are you looking for a transformer at all? The split in split phase means that you can connect loads between either hot and the neutral to get half of the overall voltage. So if you have 240V line-to-line, you will get 120V line-to-neutral. I can think of two reasons why you might actually need a transformer, but you don't give enough information to know if either one applies. Reason #1: You really do need 100-110 volts, and 120V is too much. I don't know what kind of load you are trying to run. Normal equipment intended to run on North American power typically accepts from 120 +/-10%, which would be 108 to 132 volts, and would always work when connected line-to-neutral on normal North American power. (In fact, the low limit might be more like -15%, and it would run OK down to 102 volts.) Is your load something non-standard that goes poof at 111 volts? If so, what it is? Note that some equipment that is rated for 100V has that rating because it is used on 50Hz power. Motors and other inductive loads that are rated for 120V 60Hz (normal US power) are sometimes dual-labeled for 100V 50Hz, which is common in Japan and a few other places. Motors will run faster on 120V 60Hz but otherwise should be OK. Contactor and relay coils will operate almost exactly the same on both kinds of power. If you do have something that needs a maximum of 110 volts, and you have 120V line-to-neutral power available, the smallest, lightest, and cheapest way would be to buck the power down by 10 or 12 volts. You could use a 250VA 120-to-12V transformer instead of a 2500VA 240-to-100V transformer. Reason #2: You don't have access to the neutral. For example, many electric dryer outlets in American homes are wired with two phases and ground, but not the neutral. In that case you do need a full capacity transformer. The transformer you linked to would work, assuming that your load is less than 2.5kVA. (Note that some people might suggest connecting your 120V load between one hot phase and the ground prong on the dryer connector. This is unsafe - if you have to ask the question, you should not do it. (An experienced person MIGHT be willing to do it, in a one-time special case with extra care taken to ensure safety - but in general it is a very bad idea.) On Thu, Dec 29, 2011, at 08:54 AM, Clint Washburn wrote: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI_Circu it_Breakers_Transformershash=item19b10ad81d -- John Kasunich jmkasun...@fastmail.fm -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On Thu, Dec 29, 2011, at 11:36 AM, Clint Washburn wrote: I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. My main question is given the type of transformer I was not sure how the transformer performs with two hot legs as opposed to one hot and one neutral. I am having a hard time finding a refrence to explain it to me. OK, that sheds a little light on things. I assume you are going to rectify and filter the output to make DC for your servo (or stepper) drivers. 100 to 110 volts AC when rectified and filtered will make between 140 and 155 volts DC. More at light load (since most transformers spec the output voltage at full load, it will go up unloaded), and less at full load (as the DC filter caps droop between cycles). I assume that is the DC range your drives need. Since you probably want isolation, the buck-transformer approach isn't a good idea, even if you have a neutral and thus have 120V. So you might as well get a 240 to 100V transformer. Many standard transformers are not intended to feed a rectifier load. The rectifier draws current in pulses, which cause additional heating of the transformer compared to a plain AC load. If you find something that is described as a rectifier transformer you are good to go, otherwise you probably need to oversize the transformer a bit. For more than you ever wanted to know (probably), see http://www.toroid.com/custom_transformers/technical_bulletin_1.htm Transformer sizing for a CNC is tricky anyway. How often are all three axes of your machine going to be running at full torque and full speed at the same time? And for how long? Only a few seconds probably. That is the peak load, but transformers have lots of mass and can handle large overloads for short periods of time. It is a lot harder to calculate the average load - it will depend on the size of the parts you are making, the nature of your g-code programs, etc. A decent rule of thumb might be to size the transformer for about 1/3 to 2/3 of the peak load. The one-third end of the scale is for lightly used machines where you need to save money and space. Two-thirds will be more robust. Sizing it for 100% of the peak load is just wasting money. -- John Kasunich jmkasun...@fastmail.fm -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On Thursday, December 29, 2011 03:31:21 PM Clint Washburn did opine: I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. My main question is given the type of transformer I was not sure how the transformer performs with two hot legs as opposed to one hot and one neutral. I am having a hard time finding a refrence to explain it to me. Basic physics really. AC induction motors only care about the voltage presented to their leads, and don't care at all if one of those leads is grounded. The only time it might count is if the motor has been over heated at some point and now has a short from some unk point of the windings to the motor frame, which in the real world has to be grounded anyway. Absent that unwanted connection, its only consideration is that the AC power presented to it within its operating envelope. Now, if the main motor is a variable speed DC motor, it still shouldn't care, but the development of that DC supply could require a transformer. -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Thursday, December 29, 2011 10:42 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Transformer Question On Thursday, December 29, 2011 01:36:19 PM Clint Washburn did opine: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI _C ircu it_Breakers_Transformershash=item19b10ad81d Yes, but I have to ask why? You already have 127vac with one leg grounded, the std voltage here, just by plugging whatever into the nearest duplex socket on the wall. How many amps does this pull? 15 for a normal duplex, twenty for the inline slot version that has 10 guage in the wall, beyond that you would need to have another branch circuit installed. 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 In good speaking, should not the mind of the speaker know the truth of the matter about which he is to speak? -- Plato -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ 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 To teach is to learn twice. -- Joseph Joubert -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
John Kasunich schrieb: Note that some equipment that is rated for 100V has that rating because it is used on 50Hz power. Motors and other inductive loads that are rated for 120V 60Hz (normal US power) are sometimes dual-labeled for 100V 50Hz, which is common in Japan and a few other places. ...for instance, the rest of the world... Peter Blodow -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
Transformers typically don't care if they are connected between a neutral and a hot lead or two hot leads. Dave On 12/29/2011 2:36 PM, Clint Washburn wrote: I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. My main question is given the type of transformer I was not sure how the transformer performs with two hot legs as opposed to one hot and one neutral. I am having a hard time finding a refrence to explain it to me. -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Thursday, December 29, 2011 10:42 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Transformer Question On Thursday, December 29, 2011 01:36:19 PM Clint Washburn did opine: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=BI _C ircu it_Breakers_Transformershash=item19b10ad81d Yes, but I have to ask why? You already have 127vac with one leg grounded, the std voltage here, just by plugging whatever into the nearest duplex socket on the wall. How many amps does this pull? 15 for a normal duplex, twenty for the inline slot version that has 10 guage in the wall, beyond that you would need to have another branch circuit installed. 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 In good speaking, should not the mind of the speaker know the truth of the matter about which he is to speak? -- Plato -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On Thu, Dec 29, 2011, at 09:44 PM, Peter Blodow wrote: John Kasunich schrieb: Note that some equipment that is rated for 100V has that rating because it is used on 50Hz power. Motors and other inductive loads that are rated for 120V 60Hz (normal US power) are sometimes dual-labeled for 100V 50Hz, which is common in Japan and a few other places. ...for instance, the rest of the world... Peter Blodow Really? 100V? Sure, 50Hz is found all over the place - but usually at 230V. According to http://www.dbicorporation.com/internat/intpower.htm, 100V 50Hz is only common in Japan and Okinawa. -- John Kasunich jmkasun...@fastmail.fm -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
This is how I believe the connection will be. Does this seem accurate? -Original Message- From: Dave [mailto:e...@dc9.tzo.com] Sent: Thursday, December 29, 2011 12:46 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Transformer Question Transformers typically don't care if they are connected between a neutral and a hot lead or two hot leads. Dave On 12/29/2011 2:36 PM, Clint Washburn wrote: I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. My main question is given the type of transformer I was not sure how the transformer performs with two hot legs as opposed to one hot and one neutral. I am having a hard time finding a refrence to explain it to me. -Original Message- From: gene heskett [mailto:ghesk...@wdtv.com] Sent: Thursday, December 29, 2011 10:42 AM To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Transformer Question On Thursday, December 29, 2011 01:36:19 PM Clint Washburn did opine: What type of transformer would someone use to connect to the American Split-Phase 240 volt system to get 100-110 volt output? Would one like this work? http://www.ebay.com/itm/Nunome-2-5-KVA-Transformer-/110344460317?pt=B I _C ircu it_Breakers_Transformershash=item19b10ad81d Yes, but I have to ask why? You already have 127vac with one leg grounded, the std voltage here, just by plugging whatever into the nearest duplex socket on the wall. How many amps does this pull? 15 for a normal duplex, twenty for the inline slot version that has 10 guage in the wall, beyond that you would need to have another branch circuit installed. 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 In good speaking, should not the mind of the speaker know the truth of the matter about which he is to speak? -- Plato -- -- -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Transformer Wiring.pdf Description: Adobe PDF document -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
That will work just fine. One minor quibble with your drawing. On the secondary of the 2.5kVA transformer you marked one terminal as 0V and the other as 110V. That implies that you are grounding the 0V terminal. Usually if you are rectifying to make a DC supply, you don't ground either side of the transformer, instead you ground one side of the DC supply (usually negative). On Thu, Dec 29, 2011, at 01:02 PM, Clint Washburn wrote: This is how I believe the connection will be. Does this seem accurate? -Original Message- From: Dave [mailto:e...@dc9.tzo.com] Sent: Thursday, December 29, 2011 12:46 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Transformer Question Transformers typically don't care if they are connected between a neutral and a hot lead or two hot leads. Dave Email had 1 attachment: + Transformer Wiring.pdf 50k (application/pdf) -- John Kasunich jmkasun...@fastmail.fm -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
Yes that is just in respect to what the transformer is labeled. Clint -Original Message- From: John Kasunich [mailto:jmkasun...@fastmail.fm] Sent: Thursday, December 29, 2011 1:08 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Transformer Question That will work just fine. One minor quibble with your drawing. On the secondary of the 2.5kVA transformer you marked one terminal as 0V and the other as 110V. That implies that you are grounding the 0V terminal. Usually if you are rectifying to make a DC supply, you don't ground either side of the transformer, instead you ground one side of the DC supply (usually negative). On Thu, Dec 29, 2011, at 01:02 PM, Clint Washburn wrote: This is how I believe the connection will be. Does this seem accurate? -Original Message- From: Dave [mailto:e...@dc9.tzo.com] Sent: Thursday, December 29, 2011 12:46 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Transformer Question Transformers typically don't care if they are connected between a neutral and a hot lead or two hot leads. Dave Email had 1 attachment: + Transformer Wiring.pdf 50k (application/pdf) -- John Kasunich jmkasun...@fastmail.fm -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] or4 ?
Hi all, i need to compare 4 inputs into hal (a limit value on each of 4 motors) and if one of them is true the output will be true. (it is a tetrapod, so only one motor-limit at a time can be true, fisically.) The fastest way in my mind is to use 3 or2 components, so i compare two or2 outputs as the third or2 inputs, and i know that will work, but is there some way i can solve the same logic with less components? p.s. 'till now i called 18 loadrt, between scale, and2, mux2, abs, mult2 and comp... Do them slowdown my sistem or i don't have to worry? thanks, Davide -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
On 29 December 2011 19:36, Clint Washburn cl...@clintandheidi.com wrote: I am in the process of building a power supply for my lathe and need a big transformer for for the powersupply. Are you sure you need a transformer? You do need one if you want to ground-reference the servo power, but it might equally be possible to float the servo windings, as long as the drive doesn't mind. My servos are running from an 8i20, and according to Pete that doesn't care about the relative potential of logic and DC bus grounds. (but you do need to be aware that both sides of the DC bus are very hot indeed. -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
Gene, was it you I read about building edm power supply from re-wound
microwave oven transformers? Or was it somebody else who was into the edm
discussion a couple/few years back?
On Dec 29, 2011 1:36 PM, gene heskett ghesk...@wdtv.com wrote:
On Thursday, December 29, 2011 01:10:20 PM kqt4a...@gmail.com did opine:
On Thu, 29 Dec 2011, gene heskett wrote:
On Thursday, December 29, 2011 10:08:23 AM kqt4a...@gmail.com did
opine:
On Thu, 29 Dec 2011, gene heskett wrote:
On Thursday, December 29, 2011 09:05:54 AM kqt4a...@gmail.com did
opine:
Just in case y'all run out of something to ponder
I do not have one of those fancy meters Gene mentioned but I do
have a Kill-A-Watt
118.7 volts ac
3 motors at rest - 1.15 amps
3 motors running - 1.6 amps
4 motors at rest - 1.43 amps
4 motors running - 1.85 amps
This is killing my electric bill :)
Richard
Love it, Richard. I have been meaning to get me one of those
critters myself. Could you elaborate on the size of the motors and
the PSU's output voltage?
1 - Probotix 40VDC 10Amp Linear Power Supply, no manual
And linear is not as efficient, but far more tolerant of surges.
What did they want for it?
$85.95
It was an upgrade when I bought a V90
That would make me search my junk box. It is also a bit close to the 42
volt rating of my new drivers. Rich is not on of the bennies of being
retired, darnit.
In fact, I may have something I can use now that I think about it. I
believe the supplies I use in series for EDM when I need to, could be
paralleled as the 2 in series make about 80 volts, which when used for
EDM,
with a 25 ohm limiter and a 10 UF capacitor, work very well but sent me to
the truck for my rifle range muffs, as it is ring your ears noisy. Now if
I can just recall where I got them from because I don't want to tear that
rig off the wall. I hate it when that happens. :(
I'm currently running on a 28 volt switcher
good for 12.5 amps if actively cooled. 42 volt rated drivers, so I
would like to locate a higher voltage (36?)supply. OTOH, I've only
$30 from All Electronics in this one, which also has 5 and 12 volt
outputs at logic circuit currents. They are live full time but the
main output is switchable, medical grade stuffs they claim.
3 -
http://www.probotix.com/index.php?view=productpath=14product_id=51
# 280 Oz In. Hybrid
# 1.8 /200 Steps Per Rev.
# 3 Amps Current Per Phase (Uni-polar)
# 8-wire Uni-polar or Bi-polar
# NEMA 23 Frame
262's, 4 wire for XYA, 425 on Z, 8 wire used as 4.
1 - Pacific Scientific Powermax II stepper model P21NRXA-LNF-NS-00
http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf
200 steps per rev
2.8 amps
8-wire
I think the 28 volts is making the MM-542's run warmer, so a 36 would
be better. Running at 2.4 amps, could raise that 1 notch I think.
Cheers, Gene
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Cheers, Gene
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Re: [Emc-users] or4 ?
Il giorno gio, 29/12/2011 alle 23.25 +, andy pugh ha scritto: On 29 December 2011 23:04, Spiderdab 77...@tiscali.it wrote: Hi all, i need to compare 4 inputs into hal This might help, configured as an OR. http://www.linuxcnc.org/docview/html/man/man9/logic.9.html mmm, seems perfectly what i need. but i don't understand well how to write. is it right? loadrt logic count=1 personality=4,512 to have an or with 4 in and 1 out? -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] or4 ?
Il giorno gio, 29/12/2011 alle 23.41 +, andy pugh ha scritto: On 29 December 2011 23:33, Spiderdab 77...@tiscali.it wrote: mmm, seems perfectly what i need. but i don't understand well how to write. is it right? loadrt logic count=1 personality=4,512 to have an or with 4 in and 1 out? 516, I think. Thank you Andy, the right line was: loadrt logic count=1 personality=516 but let's say that explanation here http://www.linuxcnc.org/docview/html/man/man9/logic.9.html is not so clear, also because 'in' pin names are 'logic.0.in-00', so that's a different style from the other pins. the same is with the output which name becomes 'logic.0.or'. I can say it's ok, ofcourse, but i think the doc page needs some more clear explanations. But, it works, and the biggest work it's done. so thank you again, Davide. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Probably Dumb questions of the week, about inkscape
I have installed as much inkscape as the package manager can find, and I've install the gcode-tools so the export as gcode option at least show's up. I haven't fooled with inkscape in probably 5 years, but back then I could compose dots and bars and place then, however with NDI what the scale was, it appeared to be completely arbitrary at the time. So I just installed a much more recent version, and all its clipart, but other than loading an existing .svg file, I have no clue where the composer menu went to, its just not there. So, how do I draw these things to make up a PCB trace without those? Also, to serve as the anchoring image, how can I get the hole pattern emc has already drilled, into a format that shows the actual diameter of the holes I have already drilled, into a format inkscape can import as dots of missing material? 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 Stupidity, like virtue, is its own reward. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] stepper power supply
On Thursday, December 29, 2011 09:01:51 PM Jim Coleman did opine: Gene, was it you I read about building edm power supply from re-wound microwave oven transformers? Or was it somebody else who was into the edm discussion a couple/few years back? Nope, 'twasn't me. It was probably Ed Nisley, who did a series on that sort of stuff in Circuit Celler magazine. Perhaps he can chime in and give us pointers to the articles? But I can't put EDM in the same paragraph with that series of articles either. IIRC he was making a spot welder at the time, or something that worked on a similar principle. Even if he didn't do EDM with his setup, I suspect Ed can expound on the subject, and possibly in a more expert fashion. I have only used it twice, once to remove a pair of broken Hanson taps, and once to drill the holes in a table saw blade to allow it to be mounted on my rotary table and sharpened. So I wouldn't go out on a limb and claim to be an expert. :) From what little I know, the supply and capacitor I used the last time was really serious overkill. Yes, it got the job done, but the whole neighborhood for 2 or 3 blocks around knew that the old man was probably up to no good. ;-) 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 Now I think I just reached the state of HYPERTENSION that comes JUST BEFORE you see the TOTAL at the SAFEWAY CHECKOUT COUNTER! -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Transformer Question
John Kasunich schrieb: On Thu, Dec 29, 2011, at 09:44 PM, Peter Blodow wrote: John Kasunich schrieb: Note that some equipment that is rated for 100V has that rating because it is used on 50Hz power. Motors and other inductive loads that are rated for 120V 60Hz (normal US power) are sometimes dual-labeled for 100V 50Hz, which is common in Japan and a few other places. ...for instance, the rest of the world... Peter Blodow Really? 100V? Sure, 50Hz is found all over the place - but usually at 230V. You are right, I referred only to the 50 Hz part. P. According to http://www.dbicorporation.com/internat/intpower.htm, 100V 50Hz is only common in Japan and Okinawa. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Probably Dumb questions of the week, about inkscape
On Thu, Dec 29, 2011 at 09:00:50PM -0500, gene heskett wrote: I haven't fooled with inkscape in probably 5 years, but back then I could compose dots and bars and place then, however with NDI what the scale was, it appeared to be completely arbitrary at the time. The default scale is usually pixels. You can change the display of it in a pulldown (just above the image area). You can change the default for your document in the document properties. I've made a template for my laser cutter which has a document in mm with a page size equal to the cutting area. So, how do I draw these things to make up a PCB trace without those? To draw PCB traces I'd use one of the line tools on the left. One of them makes straight lines as long as you don't click and drag when placing points. Then bring up the format menu (ctrl-shift-F) and set the width and corner style to whatever you want (turn fill off). If you want traces to be outlines you can use convert stroke to path in the Path menu which will use your line width/join settings and create a new polygon where the filled area is what the stroked area of the line was. To edit lines use the second tool (below the select tool) which is the node tool. That will let you move intersections and add/delete them. Also, to serve as the anchoring image, how can I get the hole pattern emc has already drilled, into a format that shows the actual diameter of the holes I have already drilled, into a format inkscape can import as dots of missing material? You can import and scale an image. Put it on another layer and lock the layer (even make it partially transparent). If you have an Excellon drill file and some python programming expertise you could write a plugin to import them as circles. -- Ben Jackson AD7GD b...@ben.com http://www.ben.com/ -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
