Re: [Emc-users] 3D Printer Mods?
On Wednesday 30 May 2012 09:28:56 Joachim Franek wrote: http://www.ethersex.de/index.php/Main_Page I played with this code (hw: netio). Results: - ADC is working (10bit) - pwm (named Stellalight) works (range 0..255) Commands: ECMD (http://ethersex.de/index.php/ECMD_Reference) Interfaces: rs232, tcp, udp Examples: rs232: (with 2,7V) command: adc get 4 response: 228 command: channel 0 240 response: OK eth tcp: $ echo -e adc get 4 | nc 192.168.1.92 2701 227 $ echo -e channel 0 250 | nc 192.168.1.92 2701 OK eth udp: $ echo -e adc get 4 | nc -u 192.168.1.92 2701 227 $ echo -e channel 0 250 | nc -u 192.168.1.92 2701 OK Joachim -- 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] 3D Printer Mods?
On 1 June 2012 11:09, Joachim Franek joachim.fra...@pibf.de wrote: eth tcp: $ echo -e adc get 4 | nc 192.168.1.92 2701 227 $ echo -e channel 0 250 | nc 192.168.1.92 2701 OK Those looks trivial to make into M100-style custom M-codes #! bin/bash ADC = $( echo -e adc get 4 | nc 192.168.1.92 2701) halcmd setp motion.analog-in-00 $ADC to get the data into G-code (Note that the above is guesswork, shell scripting is a closed book to me) -- 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] Commutating Reactor
No wonder that file takes so long it makes one pass at the OD then rapids to a slot makes one pass then rapids to the next slot... then rapids to the holes then rapids to the ID. And wow is it complicated and full of neat code. It would make much more sense from a machining view point to cut each slot fully then move to the next slot then change tools and drill the mounting holes and with a larger end mill cut out the center and OD of the part. The beauty of Lawrence's file is that it is completely configurable. How in the world do you hold the material to machine ID, OD, slots, and holes at the same time? If I had to make that part and I might one day, I'd drill the holes then mill the ID. Then I'd prepare a mounting plate with a boss the size of the ID then bolt the disk down and mill the slots and the OD. By duty cycle does that mean the width of the slot verses the width between the slots? John On 5/31/2012 10:43 PM, gene heskett wrote: On Thursday, May 31, 2012 11:29:49 PM John Thornton did opine: Are you tapering the slots so the edges are perpendicular to the center? That was I believe the general idea, John. I have the next one about 1/3rd done, but the run time is nearly 4 hours as I had to slow it because I could see the bit flexing a few thou. When my back gave out just now I hit the pause button while the bit was at SafeZ, put the spindle controller in manual at zero speed, blew that last passes oil debris off it, its looking great, and turned off the lights for the night. BTW, 60 slots with the subroutine is a piece of cake. If you can come up with the code to do one slot I can paste it in my subroutine and send it back. John There's stuff in it that isn't now used, but I just put a copy of whats running right now on my web page, under Genes-os9-stf/eagle/genes- encoder.ngc Part of the run time is the sheet is warping when I cut off a piece, so I have to use a total cut depth that is about 2.5x as thick as the alu, and let it nibble on the oil soaked oak sacrificial pad under it. Thanks John. Cheers, Gene -- 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] Commutating Reactor
That is some interesting code for sure and I can understand why it takes so long making one pass over the whole thing with a tiny bit and lots of rapid moves. It would be better from a machining view to do the OD and ID with a larger endmill and drill the mounting holes then switch to the tiny one to make the slots. It appears the slot sides are perpendicular to the center of the disk. If your A and B sensors are mounted in a straight line the off and on times will be a bit different between A and B if I'm understanding this correctly. Of course Z won't matter. I still think the slots could be done with less than 30 lines of code and using rotate. One bad thing I noticed is the arcs are using radius which is known to not be perfect in some cases. On 5/31/2012 10:43 PM, gene heskett wrote: On Thursday, May 31, 2012 11:29:49 PM John Thornton did opine: Are you tapering the slots so the edges are perpendicular to the center? That was I believe the general idea, John. I have the next one about 1/3rd done, but the run time is nearly 4 hours as I had to slow it because I could see the bit flexing a few thou. When my back gave out just now I hit the pause button while the bit was at SafeZ, put the spindle controller in manual at zero speed, blew that last passes oil debris off it, its looking great, and turned off the lights for the night. BTW, 60 slots with the subroutine is a piece of cake. If you can come up with the code to do one slot I can paste it in my subroutine and send it back. John There's stuff in it that isn't now used, but I just put a copy of whats running right now on my web page, under Genes-os9-stf/eagle/genes- encoder.ngc Part of the run time is the sheet is warping when I cut off a piece, so I have to use a total cut depth that is about 2.5x as thick as the alu, and let it nibble on the oil soaked oak sacrificial pad under it. Thanks John. Cheers, Gene -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional-case/ Adapter to hold a camera on a microscope, a macro lens holder for that camera, plus an LED ring illuminator for the microscope: http://softsolder.com/2011/11/14/canon-sx230hs-microscope-and-close-up-macro-adapters/ http://softsolder.com/2011/04/11/microscope-led-ring-illuminator/ Caliper repair part (no finishing required!): http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection/ Bike helmet mirror mount (ugly, but better than commercial units): http://softsolder.com/2011/07/01/helmet-mirror-mount-first-light/ http://softsolder.com/2011/06/29/helmet-mirror-mount-solid-model/ Blinky light mount for my recumbent: http://softsolder.com/2012/01/03/planet-bike-superflash-tour-easy-mount/ Cookie cutter: http://softsolder.com/2011/09/07/tux-cookie-cutter/ Fuzz blocker for a Kindle Fire: http://softsolder.com/2012/04/10/kindle-fire-power-button-protector/ Simple stepper motor mount: http://softsolder.com/2011/08/23/nema-17-stepper-motor-mount/ And, of course, improve the 3D printer: http://softsolder.com/2011/04/20/thing-o-matic-x-axis-rod-follower-installed/ Beyond their hand-knitted appearance, the parts are entirely serviceable for most of the things I do. Of course, that may just mean I do simple things that don't involve a lot of stress on either the operator or the user. [grin] Now, admittedly, those parts emerged after the better part of half a year of rebuilding to persuade my Thing-O-Matic to work the way they claimed it would. That's a whole 'nother story... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On 1 June 2012 12:31, Ed Nisley ed.08.nis...@pobox.com wrote: Beyond their hand-knitted appearance, the parts are entirely serviceable I am growing to quite like the hand-knitted appearance. -- 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] Commutating Reactor
Gene, I used debug to capture the path of the first slot and put it into my subroutine. Run the following in sim and see what you think. Even at F2 and 0.001 DOC one slot only takes a smidgen over 2 minutes to cut in my sim. F2 T1 M6 G43 #z-final = -0.025 #z-step = 0.001 G0 X1.1 Y0 Z0.05 #current-r = 0 G10 L2 P1 R#current-r o100 repeat [60] G0 X1.15 Y0 G1 X1.093745 Y-0.003410 Z0 o110 while [#5422 GT #z-final] G1 X1.093745 Y-0.003410 Z[#5422 - #z-step] G3 X1.093747 Y0.002728 R1.09375 G1 X1.183744 Y0.003611 G2 X1.183744 Y-0.003611 R1.18375 G1 X1.093747 Y-0.002728 o110 endwhile G0 Z0.05 X0 Y0 #current-r = [#current-r + 6] G10 L2 P1 R#current-r o100 endrepeat M2 -- 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] Commutating Reactor
On Friday, June 01, 2012 07:20:37 AM John Thornton did opine: No wonder that file takes so long it makes one pass at the OD :) To check fixture clearances. then rapids to a slot makes one pass then rapids to the next slot... then rapids to the holes then rapids to the ID. And wow is it complicated and full of neat code. It would make much more sense from a machining view point to cut each slot fully then move to the next slot then change tools This spindle is #2 morse collets, loosen drawbar about 2 turns, beat it loose with a piece of steel. Hard on bearings. The only fixed length is the rings on the drills, so my tool changing z accuracy if I change the collet to fit the bigger mill, really needs my autoz code. Unforch, without making a melamine jig to insulate the whole thing, that's out. It uses G38.2 for that. This way its all done with one z home one bit if I don't break it... and drill the mounting holes and with a larger end mill cut out the center and OD of the part. The beauty of Lawrence's file is that it is completely configurable. Almost, I've added about 6 or 8 more vars so it is considerable more adjustable. Lawrence's original code is also available on the net. If you need that for comparison I'll dig up the bookmark. How in the world do you hold the material to machine ID, OD, slots, and holes at the same time? Clamps on each of the 4 corners. Because this stuff is so thin, I've considered making a jig fastened to the table, then using one of the leftovers in 1/16 brass as an overlaying holddown with its own bolts to hold the stuff flat while machining. That could also serve as a dam to hold cutting oil in place a bit better, as it is, it creeps away and has to be replenished about 2x a loop thru the main loop. If I see debris stuff on the bit when it goes to safeZ, its time for more oil. I have made a mister that could keep the swarf blown away, but even with the shop door open, it turns into a glasses fogging fog of oil in there in about 30 minutes. And my lungs don't need that safflower oil in them either. This between the clamps warpage is why I have to start about 15 thou high, and run to about 10 thou into the 1/4 oak sacrificial its clamped down to. It wasn't near the problem with 1/16 brass, but with a #60 drill it would be 2-3 days to carve because the brass tends to work harden. I've already broke about $50 in these bits, but if I don't push them, they'll cut with a 0.0025 touch forever in alu if I keep an oil film on the work to seal out the oxygen. A higher speed spindle would help, this one is tapped out at 2500. Right now the 'touch' is about 0.0032, so I've dropped the feed override to about 75% where I don't see the bit flexing as much. Time I have, accuracy is whats needed. I only have to do it once IF I get it right. Keyword=right... If I had to make that part and I might one day, I'd drill the holes then mill the ID. Then I'd prepare a mounting plate with a boss the size of the ID then bolt the disk down and mill the slots and the OD. I've considered that. If I was to make them for sale I'd at least make a better holddown jig. In my case, a mini lathe, the mounting holes could be dispensed with as the finished disk is trapped between the spindles preload adjusting nut, and an identical locking nut. So the concentricity demands means that center hole is -0.000 to +0.002 max. It's about right when I have to fuss a bit to get it over the threads and seated against the preload but. At the diameter of that bolt circle the bolts would interface with the locknuts. So if to actually be used, the bolt circle would need enlarged but the limit there is when the bolts or rivets hit the center, index pulse generating interrupter. There isn't a lot of room to play in that area. :) By duty cycle does that mean the width of the slot verses the width between the slots? Yes, exactly, in order to get a 50% duty square wave. Lawrence's original cut at 50% with a /2.0 there, no comp for opto aperture. Besides, mulls are quite a bit faster then divides for the computer. My last attempt was at .45, and it was about 60/40 high/low since the opto's don't have an infinitely small aperture. Lawrence's original code also tapered the index slot, but the placement of it at the same fixed width made the inner end of the AB slot wider at slot 0, big bump in encoder velocity output. Spindle goes whump whump as that slot went by the opto's out of time. Not good. Listen to Z going crazy when running a G76, sounds like its being run by pink noise! Thanks John 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 Man's horizons are bounded by his vision. -- Live Security
Re: [Emc-users] OT: 3D Printer Mods?
On Friday, June 01, 2012 08:37:46 AM Ed Nisley did opine: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional -case/ Adapter to hold a camera on a microscope, a macro lens holder for that camera, plus an LED ring illuminator for the microscope: http://softsolder.com/2011/11/14/canon-sx230hs-microscope-and-close-up-m acro-adapters/ http://softsolder.com/2011/04/11/microscope-led-ring-illuminator/ Caliper repair part (no finishing required!): http://softsolder.com/2011/05/27/thing-o-matic-caliper-repair-perfection / Bike helmet mirror mount (ugly, but better than commercial units): http://softsolder.com/2011/07/01/helmet-mirror-mount-first-light/ http://softsolder.com/2011/06/29/helmet-mirror-mount-solid-model/ Blinky light mount for my recumbent: http://softsolder.com/2012/01/03/planet-bike-superflash-tour-easy-mount/ Cookie cutter: http://softsolder.com/2011/09/07/tux-cookie-cutter/ Fuzz blocker for a Kindle Fire: http://softsolder.com/2012/04/10/kindle-fire-power-button-protector/ Simple stepper motor mount: http://softsolder.com/2011/08/23/nema-17-stepper-motor-mount/ And, of course, improve the 3D printer: http://softsolder.com/2011/04/20/thing-o-matic-x-axis-rod-follower-insta lled/ This is all great stuff Ed, thanks for posting it. Beyond their hand-knitted appearance, the parts are entirely serviceable for most of the things I do. Of course, that may just mean I do simple things that don't involve a lot of stress on either the operator or the user. [grin] Now, admittedly, those parts emerged after the better part of half a year of rebuilding to persuade my Thing-O-Matic to work the way they claimed it would. That's a whole 'nother story... Chuckle. That is how this stuff always works. Like doing an engine swap, get all the kits together, but bring $500 for the stuff you have to go get because the bolts are 3/8 but the holes are 7/16. BTDT. :) 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 YOU I'm an atheist; to God, I'm the Loyal Opposition. -- Woody Allen -- 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] Commutating Reactor
On 6/1/2012 7:28 AM, gene heskett wrote: On Friday, June 01, 2012 07:20:37 AM John Thornton did opine: No wonder that file takes so long it makes one pass at the OD :) To check fixture clearances. then rapids to a slot makes one pass then rapids to the next slot... then rapids to the holes then rapids to the ID. And wow is it complicated and full of neat code. It would make much more sense from a machining view point to cut each slot fully then move to the next slot then change tools This spindle is #2 morse collets, loosen drawbar about 2 turns, beat it loose with a piece of steel. Hard on bearings. The only fixed length is the rings on the drills, so my tool changing z accuracy if I change the collet to fit the bigger mill, really needs my autoz code. Unforch, without making a melamine jig to insulate the whole thing, that's out. It uses G38.2 for that. This way its all done with one z home one bit if I don't break it... Yea, for multiple tools have multiple G code files, set Z run one to completion, change tools set Z ... and drill the mounting holes and with a larger end mill cut out the center and OD of the part. The beauty of Lawrence's file is that it is completely configurable. Almost, I've added about 6 or 8 more vars so it is considerable more adjustable. Lawrence's original code is also available on the net. If you need that for comparison I'll dig up the bookmark. That's ok your rendition was interesting enough to look at... How in the world do you hold the material to machine ID, OD, slots, and holes at the same time? Clamps on each of the 4 corners. Because this stuff is so thin, I've considered making a jig fastened to the table, then using one of the leftovers in 1/16 brass as an overlaying holddown with its own bolts to hold the stuff flat while machining. That could also serve as a dam to hold cutting oil in place a bit better, as it is, it creeps away and has to be replenished about 2x a loop thru the main loop. If I see debris stuff on the bit when it goes to safeZ, its time for more oil. I have made a mister that could keep the swarf blown away, but even with the shop door open, it turns into a glasses fogging fog of oil in there in about 30 minutes. And my lungs don't need that safflower oil in them either. This between the clamps warpage is why I have to start about 15 thou high, and run to about 10 thou into the 1/4 oak sacrificial its clamped down to. It wasn't near the problem with 1/16 brass, but with a #60 drill it would be 2-3 days to carve because the brass tends to work harden. I've already broke about $50 in these bits, but if I don't push them, they'll cut with a 0.0025 touch forever in alu if I keep an oil film on the work to seal out the oxygen. A higher speed spindle would help, this one is tapped out at 2500. Right now the 'touch' is about 0.0032, so I've dropped the feed override to about 75% where I don't see the bit flexing as much. Time I have, accuracy is whats needed. I only have to do it once IF I get it right. Keyword=right... If I had to make that part and I might one day, I'd drill the holes then mill the ID. Then I'd prepare a mounting plate with a boss the size of the ID then bolt the disk down and mill the slots and the OD. I've considered that. If I was to make them for sale I'd at least make a better holddown jig. In my case, a mini lathe, the mounting holes could be dispensed with as the finished disk is trapped between the spindles preload adjusting nut, and an identical locking nut. So the concentricity demands means that center hole is -0.000 to +0.002 max. It's about right when I have to fuss a bit to get it over the threads and seated against the preload but. At the diameter of that bolt circle the bolts would interface with the locknuts. So if to actually be used, the bolt circle would need enlarged but the limit there is when the bolts or rivets hit the center, index pulse generating interrupter. There isn't a lot of room to play in that area. :) By duty cycle does that mean the width of the slot verses the width between the slots? Yes, exactly, in order to get a 50% duty square wave. Lawrence's original cut at 50% with a /2.0 there, no comp for opto aperture. Besides, mulls are quite a bit faster then divides for the computer. My last attempt was at .45, and it was about 60/40 high/low since the opto's don't have an infinitely small aperture. Lawrence's original code also tapered the index slot, but the placement of it at the same fixed width made the inner end of the AB slot wider at slot 0, big bump in encoder velocity output. Spindle goes whump whump as that slot went by the opto's out of time. Not good. Listen to Z going crazy when running a G76, sounds like its being run by pink noise! Pink Floyd noise! The subroutine I cobbled up could be done in the same way with all the variables. The radius of the arcs at the end of the slot is
Re: [Emc-users] Commutating Reactor
On Friday, June 01, 2012 08:50:05 AM John Thornton did opine: Gene, I used debug to capture the path of the first slot and put it into my subroutine. Run the following in sim and see what you think. Even at F2 and 0.001 DOC one slot only takes a smidgen over 2 minutes to cut in my sim. F2 T1 M6 G43 #z-final = -0.025 #z-step = 0.001 G0 X1.1 Y0 Z0.05 #current-r = 0 G10 L2 P1 R#current-r o100 repeat [60] G0 X1.15 Y0 G1 X1.093745 Y-0.003410 Z0 o110 while [#5422 GT #z-final] G1 X1.093745 Y-0.003410 Z[#5422 - #z-step] G3 X1.093747 Y0.002728 R1.09375 G1 X1.183744 Y0.003611 G2 X1.183744 Y-0.003611 R1.18375 G1 X1.093747 Y-0.002728 o110 endwhile G0 Z0.05 X0 Y0 #current-r = [#current-r + 6] G10 L2 P1 R#current-r o100 endrepeat M2 Printed. I'll likely put in some named vars if I use it, but I'll give it a shot as is after the current one is finished. Thanks a bunch, John. 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 Absolutely nothing should be concluded from these figures except that no conclusion can be drawn from them. -- Joseph L. Brothers, Linux/PowerPC Project) -- 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] Commutating Reactor
On Friday, June 01, 2012 08:59:21 AM John Thornton did opine: On 6/1/2012 7:28 AM, gene heskett wrote: On Friday, June 01, 2012 07:20:37 AM John Thornton did opine: No wonder that file takes so long it makes one pass at the OD :) To check fixture clearances. : then rapids to a slot makes one pass then rapids to the next slot... then rapids to the holes then rapids to the ID. And wow is it complicated and full of neat code. It would make much more sense from a machining view point to cut each slot fully then move to the next slot then change tools This spindle is #2 morse collets, loosen drawbar about 2 turns, beat it loose with a piece of steel. Hard on bearings. The only fixed length is the rings on the drills, so my tool changing z accuracy if I change the collet to fit the bigger mill, really needs my autoz code. Unforch, without making a melamine jig to insulate the whole thing, that's out. It uses G38.2 for that. This way its all done with one z home one bit if I don't break it... Yea, for multiple tools have multiple G code files, set Z run one to completion, change tools set Z ... and drill the mounting holes and with a larger end mill cut out the center and OD of the part. The beauty of Lawrence's file is that it is completely configurable. Almost, I've added about 6 or 8 more vars so it is considerable more adjustable. Lawrence's original code is also available on the net. If you need that for comparison I'll dig up the bookmark. That's ok your rendition was interesting enough to look at... How in the world do you hold the material to machine ID, OD, slots, and holes at the same time? Clamps on each of the 4 corners. Because this stuff is so thin, I've considered making a jig fastened to the table, then using one of the leftovers in 1/16 brass as an overlaying holddown with its own bolts to hold the stuff flat while machining. That could also serve as a dam to hold cutting oil in place a bit better, as it is, it creeps away and has to be replenished about 2x a loop thru the main loop. If I see debris stuff on the bit when it goes to safeZ, its time for more oil. I have made a mister that could keep the swarf blown away, but even with the shop door open, it turns into a glasses fogging fog of oil in there in about 30 minutes. And my lungs don't need that safflower oil in them either. This between the clamps warpage is why I have to start about 15 thou high, and run to about 10 thou into the 1/4 oak sacrificial its clamped down to. It wasn't near the problem with 1/16 brass, but with a #60 drill it would be 2-3 days to carve because the brass tends to work harden. I've already broke about $50 in these bits, but if I don't push them, they'll cut with a 0.0025 touch forever in alu if I keep an oil film on the work to seal out the oxygen. A higher speed spindle would help, this one is tapped out at 2500. Right now the 'touch' is about 0.0032, so I've dropped the feed override to about 75% where I don't see the bit flexing as much. Time I have, accuracy is whats needed. I only have to do it once IF I get it right. Keyword=right... If I had to make that part and I might one day, I'd drill the holes then mill the ID. Then I'd prepare a mounting plate with a boss the size of the ID then bolt the disk down and mill the slots and the OD. I've considered that. If I was to make them for sale I'd at least make a better holddown jig. In my case, a mini lathe, the mounting holes could be dispensed with as the finished disk is trapped between the spindles preload adjusting nut, and an identical locking nut. So the concentricity demands means that center hole is -0.000 to +0.002 max. It's about right when I have to fuss a bit to get it over the threads and seated against the preload but. At the diameter of that bolt circle the bolts would interface with the locknuts. So if to actually be used, the bolt circle would need enlarged but the limit there is when the bolts or rivets hit the center, index pulse generating interrupter. There isn't a lot of room to play in that area. :) By duty cycle does that mean the width of the slot verses the width between the slots? Yes, exactly, in order to get a 50% duty square wave. Lawrence's original cut at 50% with a /2.0 there, no comp for opto aperture. Besides, mulls are quite a bit faster then divides for the computer. My last attempt was at .45, and it was about 60/40 high/low since the opto's don't have an infinitely small aperture. Lawrence's original code also tapered the index slot, but the placement of it at the same fixed width made the inner end of the AB slot wider at slot 0, big bump in encoder velocity output. Spindle goes whump whump as that slot went by the opto's out of time. Not good. Listen to Z going crazy when running a G76, sounds like its
Re: [Emc-users] OT: 3D Printer Mods?
2012/6/1 Ed Nisley ed.08.nis...@pobox.com: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... Awesome! Thank You very much for sharing!!! -- 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] 3D Printer Mods?
Andy, prior to express my question you give the answer. Thanks. Joachim On Friday 01 June 2012 12:36:51 andy pugh wrote: #! bin/bash ADC = $( echo -e adc get 4 | nc 192.168.1.92 2701) halcmd setp motion.analog-in-00 $ADC BTW: which comp to load for testing (without lcnc running)? Is a signal possible? -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
Ed; On 2012-06-01, at 7:31 AM, Ed Nisley wrote: Some examples of stuff I've designed build used… Like others, I'm very impressed. Thanks for the posting, and the web page. JohnS. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, Jun 1, 2012 at 7:31 AM, Ed Nisley ed.08.nis...@pobox.com wrote: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... Your parts really show the utility of these machines. I was originally skeptical a few years ago because they went on and on about self-replicating machines which made me doubt the credibility of the whole enterprise. Now that a lot of people have them working it has become obvious that anyone that makes things is handicapping themselves if they don't have this kind of machine available to them. Eric -- 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] 3D Printer Mods?
On 1 June 2012 14:52, Joachim Franek joachim.fra...@pibf.de wrote: halcmd setp motion.analog-in-00 $ADC which comp to load for testing (without lcnc running)? Is a signal possible? You want to see if you can get values into HAL, but without starting all of LinuxCNC? You can probably do it with two terminal windows: Window 1: halrun loadrt and2 Window 2: ADC = $( echo -e adc get 4 | nc 192.168.1.92 2701) halcmd setp and2.0.in0 $ADC Window1: show pin I chose almost at random, just to create some HAL pins to write to. You would need loadrt threads / addf and2.0 thread1 / start if you wanted to see the output pins update -- 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] Commutating Reactor
Gene- You could hold your stock down easily with super glue and then use acetone to release it like this: http://millpcbs.com/index.php?option=com_contentview=articleid=19Itemid=63 . +++ We are like tenant farmers chopping down the fence around our house for fuel when we should be using Nature's inexhaustible sources of energy -- sun, wind and tide. ... I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that. -Thomas Edison, inventor (1847-1931) From: gene heskett ghesk...@wdtv.com To: emc-users@lists.sourceforge.net Sent: Friday, June 1, 2012 7:28 AM Subject: Re: [Emc-users] Commutating Reactor On Friday, June 01, 2012 07:20:37 AM John Thornton did opine: No wonder that file takes so long it makes one pass at the OD :) To check fixture clearances. then rapids to a slot makes one pass then rapids to the next slot... then rapids to the holes then rapids to the ID. And wow is it complicated and full of neat code. It would make much more sense from a machining view point to cut each slot fully then move to the next slot then change tools This spindle is #2 morse collets, loosen drawbar about 2 turns, beat it loose with a piece of steel. Hard on bearings. The only fixed length is the rings on the drills, so my tool changing z accuracy if I change the collet to fit the bigger mill, really needs my autoz code. Unforch, without making a melamine jig to insulate the whole thing, that's out. It uses G38.2 for that. This way its all done with one z home one bit if I don't break it... and drill the mounting holes and with a larger end mill cut out the center and OD of the part. The beauty of Lawrence's file is that it is completely configurable. Almost, I've added about 6 or 8 more vars so it is considerable more adjustable. Lawrence's original code is also available on the net. If you need that for comparison I'll dig up the bookmark. How in the world do you hold the material to machine ID, OD, slots, and holes at the same time? Clamps on each of the 4 corners. Because this stuff is so thin, I've considered making a jig fastened to the table, then using one of the leftovers in 1/16 brass as an overlaying holddown with its own bolts to hold the stuff flat while machining. That could also serve as a dam to hold cutting oil in place a bit better, as it is, it creeps away and has to be replenished about 2x a loop thru the main loop. If I see debris stuff on the bit when it goes to safeZ, its time for more oil. I have made a mister that could keep the swarf blown away, but even with the shop door open, it turns into a glasses fogging fog of oil in there in about 30 minutes. And my lungs don't need that safflower oil in them either. This between the clamps warpage is why I have to start about 15 thou high, and run to about 10 thou into the 1/4 oak sacrificial its clamped down to. It wasn't near the problem with 1/16 brass, but with a #60 drill it would be 2-3 days to carve because the brass tends to work harden. I've already broke about $50 in these bits, but if I don't push them, they'll cut with a 0.0025 touch forever in alu if I keep an oil film on the work to seal out the oxygen. A higher speed spindle would help, this one is tapped out at 2500. Right now the 'touch' is about 0.0032, so I've dropped the feed override to about 75% where I don't see the bit flexing as much. Time I have, accuracy is whats needed. I only have to do it once IF I get it right. Keyword=right... If I had to make that part and I might one day, I'd drill the holes then mill the ID. Then I'd prepare a mounting plate with a boss the size of the ID then bolt the disk down and mill the slots and the OD. I've considered that. If I was to make them for sale I'd at least make a better holddown jig. In my case, a mini lathe, the mounting holes could be dispensed with as the finished disk is trapped between the spindles preload adjusting nut, and an identical locking nut. So the concentricity demands means that center hole is -0.000 to +0.002 max. It's about right when I have to fuss a bit to get it over the threads and seated against the preload but. At the diameter of that bolt circle the bolts would interface with the locknuts. So if to actually be used, the bolt circle would need enlarged but the limit there is when the bolts or rivets hit the center, index pulse generating interrupter. There isn't a lot of room to play in that area. :) By duty cycle does that mean the width of the slot verses the width between the slots? Yes, exactly, in order to get a 50% duty square wave. Lawrence's original cut at 50% with a /2.0 there, no comp for opto aperture. Besides, mulls are quite a bit faster then divides for the computer. My last attempt was
Re: [Emc-users] OT: 3D Printer Mods?
On Wed, May 30, 2012 at 3:51 AM, Roland Jollivet roland.jolli...@gmail.com wrote: Do you mind saying what you are printing, and if you feel the printing is a worthwhile exercise? I've been looking at different printers for months, but they only seem to be able to produce junk. Cnc'ing it out of a block of plastic looks far more effective. The 3D printer situation today reminds me of the old times when I first ran into phototypesetters, in the early eighties. They used thin shiny paper that curled from looking at it, stuck together, and smelled funny. The quality left to be desired; the output looked somehow like this: http://dpnow.com/vintage/Features/Printer_reviews/Canon_s900/Test_results1/Quality1/text1/epson_870_normal.jpg But, you could write your text and math in TeX and typeset it into a correct form that, if you squinted a little, looked just as good as professional books. And you could do it over and over, whenever you needed it. Just have patience and see if you can use the 3D technology today in spite of its current imperfections. By the way, I would like to try two tricks with 3D printing: - inserts: e.g. if you need a tight tolerance or high strength, insert a brass bushing half way into a part being formed - post-processing, i.e. CNC the precision part out of a rough 3D printed shape, just like machining a casting. It should beat CNCing billets, no? -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Friday 01 June 2012 16:47:57 Przemek Klosowski wrote: - post-processing, i.e. CNC the precision part out of a rough 3D printed shape, just like machining a casting. With a spindel parallel to the extruder head. Here lcnc has it's advantage. Joachim -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 08:44 -0400, gene heskett wrote: the bolts are 3/8 but the holes are 7/16 In this case, the bolts were 7/16 and the holes 3/8... [grin] -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Fri, 2012-06-01 at 10:10 -0400, Eric Keller wrote: anyone that makes things Unlike folks who use industrial-grade machinery to build exquisite widgets (you know who you are), mostly, I fix stuff. Being able to sketch out a solid model and then have it *happen* is wonderfully liberating. The Sherline CNC mill does great work (I just made a plug-ugly manual-CNC scabbard for a garden knife yesterday), but for complex shapes the 3D printer can't be beat. That radio case was what compelled me to get the printer: I couldn't imagine carving another case from solid acrylic on the Sherline. It took a few tries to get the design sizes right, but now I can build a second and a third with only a few minutes of finishing fitting; the printer can be building a case while I'm making the PCB to go inside. When we eventually downsize, I know which machine tool is a keeper... -- Ed http://softsolder.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
Very nice Ed. And thanks for including the OpenSCAD source code. Will prove an interesting read. Drew On 06/01/2012 04:31 AM, Ed Nisley wrote: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional-case/ -- 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] Commutating Reactor
I posted on the C(ommerical)NCZone and a guy there says those drives are rated for a 3% inductance wye isolation transformer. John On 5/31/2012 3:20 PM, Dave wrote: They really don't have to be, but they should probably both be larger than 10 KVA. If you have one that was 30 KVA and another that was 10KVA, I wouldn't hesitate to hook them together for a test. Although if you can trip out your 611 with only the spindle running and ramping up slowly, even a couple of 7.5 KVA transformers would probably prove out the situation one way or another. Dave On 5/31/2012 3:15 PM, John Thornton wrote: I might be able to scrounge another 240-480 transformer and put it with the one I have to get back to 240... do you think they need to be similar in size? John On 5/31/2012 11:28 AM, Dave wrote: Looks to me like it is more like a $1264 question. ;-) I don't know. That's why I would try and borrow one first. Know of any plants where you do work that has a spare transformer lying around? I've put a couple of them together before to get the right voltage.. IE 240 to 480 and then 480 to 380 etc. Dave On 5/31/2012 12:06 PM, John Thornton wrote: I just ran another program to drill and tap a slew of holes in a 1/2 steel plate with no problems except for I picked the 5/16-18 tap and drill for the 1/4-20 holes and proceeded to tap all 8 of them at the 20 TPI pitch... no biggie I'll tap them out to 3/8 and plug them and tap them over again. $64 question will the isolation transformer do the same thing the 7.5hp spindle motor is doing on the Samson? John On 5/31/2012 9:43 AM, Dave wrote: You are probably right. When the drive load surges it is likely faulting out on what it thinks is a lost phase or phase undervoltage. It might be interesting is to run this test again and put a clamp on ammeter on each leg feeding your Mill and see how balanced the currents are. I have never really had any problem with my phase converter running loads so I haven't paid much attention to it, but I think I only have run capacitors connected between one phase and the made up phase. I know I don't have any between both of the two original phases. I was always more concerned about the current balance between phases than voltages. The voltages have always been within reason ( as I recall ). But then this is one of those things that I don't pay much attention to unless it isn't working. I suspect that the 611 is expecting a stiff power supply - which most 3 phase services can provide. If you have a large pulley you can attach to your phase converter motor shaft to add inertia to the rotor, you might want to attach it. It would help the motor supply surge current to the 611 drive. Dave On 5/31/2012 10:04 AM, John Thornton wrote: A little update this morning after last night's experiments I built on that a bit this morning. I upped the MFD's on the B-C and A-C caps a little at a time till I got close to what I think I wanted in voltage. This is what I ended up with... Phase === A-BB-CA-C Caps 50MFD 100MFD 220MFd RFC on 246v 263v 271v Samson @440 RPM246v 247v 249v 611 Drive on 245v 243v 241v Engraving @6k RPM 244v 243v 234v I grabbed a program at random an it turned out to be engraving my company logo at 6k RPM. Now mind you this was not 0 to 6k but 0 to 2k with a 0.09 second pause between 100 RPM increases up to 6k. To my surprise the program ran to the end without a fault including rapids at 295IPM on the Z axis. When I go to town I'm going to snatch up a few more caps to play with and bump up A-C a bit more to try and even it out. This will at least allow me to make parts for the time being until I either get an isolation transformer or generator. The interesting thing that I discovered is if I start up the Samson lathe with the 611 on I get a fault and have to reset the drive. This leads my tiny brain to think that it is a voltage drop to some degree that is tripping out the 611... what do you guys think? When my neighbor gets around to showing me how to store the traces in the scope I'll try and capture the wave form when this happens. Thanks for all the help and ideas. John -- 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
[Emc-users] First LinuxCNC machine - picking a computer
Hi, I'm setting up a LinuxCNC system to control a Fireball v90 router. Is there any way to know if this system from Newegg will work with LinuxCNC without buying it first? http://www.newegg.com/Product/Product.aspx?Item=N82E16856119071 I also plan to get a 5I25 plugged into a gecko g540 stepper controller. Thanks, Jason -- 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] First LinuxCNC machine - picking a computer
On 1 June 2012 18:39, Jason Thorsness thorsn...@gmail.com wrote: I'm setting up a LinuxCNC system to control a Fireball v90 router. Is there any way to know if this system from Newegg will work with LinuxCNC without buying it first? http://www.newegg.com/Product/Product.aspx?Item=N82E16856119071 Not really, I don't think. But http://www.newegg.com/Product/Product.aspx?Item=N82E16813121442 Definitely will work. You don't necessarily need a case for a CNC controller, as you can put the MB in the same box as the motor drives, PSUs etc. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
I've gone off and started making 3D printers out of 3D printed parts and extruded aluminum frame. I have 21 different extruded parts and 7 machined parts (off a CNC sherline and a CNC Taig), a lot of off-the-shelf parts and a few parts I still have to hand-make, but the leap to CNCing those isn't that far. The ability to try different designs at virtually no cost and iterate your existing designs and have the new part in n hour is incredible. It allows you to come out with the maturity of a future revision from the start, and if your design doesn't work, well, a complete redesign with parts to test is a matter of days. I happen to be making printers, but if i were making windmills I'd still use the same process. If you are a product designer I can't imagine a better tool. Think of it as the ultimate in try before you buy - you don't have to commit anything to injection molding until you've actually held it in your hand. Thanks, DougM On Fri, Jun 1, 2012 at 8:21 AM, Drew Rogge d...@dasrogges.com wrote: Very nice Ed. And thanks for including the OpenSCAD source code. Will prove an interesting read. Drew On 06/01/2012 04:31 AM, Ed Nisley wrote: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... A case for a GPS+voice amateur radio circuit: http://softsolder.com/2012/04/13/wouxun-kg-uv3d-gps-interface-functional-case/ -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
This telescoping planetary gear was entirely 3D printed except for a few M3 screws. My machine's calibration was significantly off at the time, so I had some clearance issues and I need to do a bit of sanding to get the pieces to fit. Otherwise, it was just print, remove part, print, remove part, print remove part, ... assemble. The pieces were done in the office, next to the boys bedroom, while the boys were sleeping, or during dinner hours. http://chime.in/user/toybuilder/chime/121492527804276736 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Jun 1, 2012, at 7:31 AM, Ed Nisley wrote: On Wed, 2012-05-30 at 19:29 +0200, Roland Jollivet wrote: The thing is, what do you do with these parts? Some examples of stuff I've designed build used... Cool stuff, Ed. I made a modular box for my ER-25 collets I have laying around. http://www.thingiverse.com/thing:16161 -Tom -- 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] Commutating Reactor
Hi, I'm a complete newb on this particular topic, and may not have read all the fine details, but it seems like this might be something better suited to photoresist/chemical etching, rather than using bits to try to mill out the interruptor disks? Or perhaps laser cut sheets, like the kinds used for solder stencils, would also do the job? Cheers, Joseph -- 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] Commutating Reactor
On 1 June 2012 21:19, Joseph Chiu joec...@joechiu.com wrote: I'm a complete newb on this particular topic, and may not have read all the fine details, but it seems like this might be something better suited to photoresist/chemical etching, rather than using bits to try to mill out the interruptor disks? Or perhaps laser cut sheets, like the kinds used for solder stencils, would also do the job? I can say that solder stencil manufacturers can certainly make very nice encoders, for a price. https://picasaweb.google.com/108164504656404380542/CNCUnsorted#5746547530954320162 512 slots, 45mm bore. -- 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] Commutating Reactor
On Friday, June 01, 2012 06:18:41 PM Greg Bernard did opine: Gene- You could hold your stock down easily with super glue and then use acetone to release it like this: http://millpcbs.com/index.php?option=com_contentview=articleid=19Ite mid=63 . I personally have not had that great an experience at getting superglue to let go with acetone. Once set by the moisture in my skin, a stuck fingertip is half an hours work. And required far more effort than this .018 thin alu could stand without bending it up pretty good. I did get the 60 slot wheel done, but its not possible to have 60 slots AND a slot narrow enough for a 50% duty cycle output. And despite a freshly done backlash adjustment for xy, I find this teensie bit wanting to crawl in the direction of the side that is cutting, at feedrates of 4 to 6 and .0015 DOC. So I've restarted it after the first .014 down with a feedrate of .7. Properties says it now has a 909 minute runtime, but it is gradually straightening out the S curve in what is supposed to be a straight line. Dig cutting, if that doesn't fix it, I go to climb cutting I guess. John T.: I did a short pass with your code, cutting 2 slots. Feed way too fast, the slots were badly S shaped from bit flex. It sure looked like a good idea though. Thanks. Running a .7 feedrate, it is gradually straightening out the bottoms of the slots. I also went down to a 45 cycle wheel with the narrowest slot for the one under construction now, but my calipers are telling me I'll have to pull the opto's together by at least 50 thou to get good quadrature. Dunno if I can bend then that far or not. We'll see when this one is done. I'll see what the duty cycle is as I'd druther go up than down. Here is a strange observance though, in halscope, encoder.0.velocity is not responding to spindle rotation at all until the spindle is up to at least 1.5 to 2 rps! Below that, nothing at any gain. Weirdsville. I don't recall buying a ticket to this sideshow. ;) 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 The more complex the mind, the greater the need for the simplicity of play. -- Kirk, Shore Leave, stardate 3025.8 -- 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] OT: 3D Printer Mods?
On Friday, June 01, 2012 06:45:30 PM Ed Nisley did opine: On Fri, 2012-06-01 at 08:44 -0400, gene heskett wrote: the bolts are 3/8 but the holes are 7/16 In this case, the bolts were 7/16 and the holes 3/8... [grin] Your kit of taps is in the bottom drawer of the tool chest I assume? ;) Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I am a deeply superficial person. -- Andy Warhol -- 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] Commutating Reactor
On 1 June 2012 23:44, gene heskett ghesk...@wdtv.com wrote: I personally have not had that great an experience at getting superglue to let go with acetone. I glued in my encoder disc (see earlier picture) then found I needed it out again. Luckily heating to 200C released it, with no damage. And that was only 0.15mm thick. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On Friday, June 01, 2012 06:47:42 PM Ed Nisley did opine: On Fri, 2012-06-01 at 10:10 -0400, Eric Keller wrote: anyone that makes things Unlike folks who use industrial-grade machinery to build exquisite widgets (you know who you are), mostly, I fix stuff. Being able to sketch out a solid model and then have it *happen* is wonderfully liberating. The Sherline CNC mill does great work (I just made a plug-ugly manual-CNC scabbard for a garden knife yesterday), but for complex shapes the 3D printer can't be beat. That radio case was what compelled me to get the printer: I couldn't imagine carving another case from solid acrylic on the Sherline. It took a few tries to get the design sizes right, but now I can build a second and a third with only a few minutes of finishing fitting; the printer can be building a case while I'm making the PCB to go inside. When we eventually downsize, I know which machine tool is a keeper... That I have faith will be a long time down the log for you Ed. At 77, I haven't even considered that dreadful thought yet. He who dies with the most toys (is still dead) ;) Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I am a deeply superficial person. -- Andy Warhol -- 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] Commutating Reactor
On Fri, 1 Jun 2012 13:19:24 -0700 Joseph Chiu joec...@joechiu.com wrote: Hi, I'm a complete newb on this particular topic, and may not have read all the fine details, but it seems like this might be something better suited to photoresist/chemical etching, rather than using bits to try to mill out the interruptor disks? Or perhaps laser cut sheets, like the kinds used for solder stencils, would also do the job? Cheers, Joseph If I wanted to make a lot of them I'd mill a master out of Cu and then ECM (electrochemical machine) them. Works rather well. Low distortion. I once saw a portable ecm designed to mill holes (actually cut a disc out of) the side of unexploded ordnance in S.E Asia. ;-) Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Commutating Reactor
On Friday, June 01, 2012 06:50:05 PM John Thornton did opine: I posted on the C(ommerical)NCZone and a guy there says those drives are rated for a 3% inductance wye isolation transformer. John BS alert there John. 3% of what? Without a frame of reference you may as well be shopping for a good used car. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I can't understand why a person will take a year or two to write a novel when he can easily buy one for a few dollars. -- Fred Allen -- 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] First LinuxCNC machine - picking a computer
On Friday, June 01, 2012 06:53:16 PM Jason Thorsness did opine: Hi, I'm setting up a LinuxCNC system to control a Fireball v90 router. Is there any way to know if this system from Newegg will work with LinuxCNC without buying it first? http://www.newegg.com/Product/Product.aspx?Item=N82E16856119071 I also plan to get a 5I25 plugged into a gecko g540 stepper controller. Thanks, Jason Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene I can't understand why a person will take a year or two to write a novel when he can easily buy one for a few dollars. -- Fred Allen -- 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] Commutating Reactor
On Friday, June 01, 2012 07:00:33 PM Joseph Chiu did opine: Hi, I'm a complete newb on this particular topic, and may not have read all the fine details, but it seems like this might be something better suited to photoresist/chemical etching, rather than using bits to try to mill out the interruptor disks? Or perhaps laser cut sheets, like the kinds used for solder stencils, would also do the job? Cheers, Joseph Unforch, no laser. But yes it might work. Thanks Joseph. 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 It is only with the heart one can see clearly; what is essential is invisible to the eye. -- The Fox, 'The Little Prince -- 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] Commutating Reactor
On Friday, June 01, 2012 07:03:18 PM andy pugh did opine: On 1 June 2012 23:44, gene heskett ghesk...@wdtv.com wrote: I personally have not had that great an experience at getting superglue to let go with acetone. I glued in my encoder disc (see earlier picture) then found I needed it out again. Luckily heating to 200C released it, with no damage. And that was only 0.15mm thick. Yes, that works well at 250C and up, but that is not at all friendly to other organics, like skin. :-) 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 It is only with the heart one can see clearly; what is essential is invisible to the eye. -- The Fox, 'The Little Prince -- 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] First LinuxCNC machine - picking a computer
On 1 June 2012 23:54, gene heskett ghesk...@wdtv.com wrote: Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Mine is, as far as I can see. -- 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] First LinuxCNC machine - picking a computer
If you can swing it get an SSD for your shiny new machine. I've got two 525 machines side by side and the one with the SSD is so much faster it's amazing. DougM On Fri, Jun 1, 2012 at 4:06 PM, andy pugh bodge...@gmail.com wrote: On 1 June 2012 23:54, gene heskett ghesk...@wdtv.com wrote: Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Mine is, as far as I can see. -- 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] First LinuxCNC machine - picking a computer
On Sat, 2 Jun 2012 00:06:43 +0100 andy pugh bodge...@gmail.com wrote: On 1 June 2012 23:54, gene heskett ghesk...@wdtv.com wrote: Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Mine is, as far as I can see. AFIK, D510 and D525 are both dual core. 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] First LinuxCNC machine - picking a computer
On 2 June 2012 00:33, doug metzler doug.metz...@gmail.com wrote: If you can swing it get an SSD for your shiny new machine. I've got two 525 machines side by side and the one with the SSD is so much faster it's amazing. It needn't be a big one, 8GB is plenty. -- 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] Commutating Reactor
On Fri, 1 Jun 2012 19:04:23 -0400 gene heskett ghesk...@wdtv.com wrote: On Friday, June 01, 2012 07:03:18 PM andy pugh did opine: On 1 June 2012 23:44, gene heskett ghesk...@wdtv.com wrote: I personally have not had that great an experience at getting superglue to let go with acetone. I glued in my encoder disc (see earlier picture) then found I needed it out again. Luckily heating to 200C released it, with no damage. And that was only 0.15mm thick. Yes, that works well at 250C and up, but that is not at all friendly to other organics, like skin. :-) Cheers, Gene cyanoacrylics bond to almost anything but are reluctant to unbond without help. Well, you are cooked at 250 F so another milder method is recommended. :-) The stuff will hydrolyze so very warm water may help. However, be aware that it makes a good surgical glues. 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] Commutating Reactor
gene heskett wrote: On Friday, June 01, 2012 06:50:05 PM John Thornton did opine: I posted on the C(ommerical)NCZone and a guy there says those drives are rated for a 3% inductance wye isolation transformer. John BS alert there John. 3% of what? Without a frame of reference you may as well be shopping for a good used car. No, this is actually standard power engineering terminology. I don't recall the way this is measured, but it has a specific definition to a power EE. The basic concept is this % inductance tells you what the fault current and sag will be under particular loads. But, of course, this refers to running the transformer from a stiff 3-phase mains supply, not a saggy rotary converter. Jon Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] OT: 3D Printer Mods?
On 06/01/2012 01:52 PM, doug metzler wrote: If you are a product designer I can't imagine a better tool. Think of it as the ultimate in try before you buy - you don't have to commit anything to injection molding until you've actually held it in your hand. Thanks, DougM Better than that, you will have a solid model to give the mold maker so he can check his work. There's nothing like ordering a mold, and on the first test run, finding out that the company machined it wrong... And it'll take another 6 weeks to fix it. The molds I'm used to weighed 20 tons, but the idea applies to anything being made. -- -Mark Ne M'oubliez ---Family Motto Hope for the best, plan for the worst ---Personal Motto -- 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] First LinuxCNC machine - picking a computer
On Saturday, June 02, 2012 12:17:02 AM andy pugh did opine: On 1 June 2012 23:54, gene heskett ghesk...@wdtv.com wrote: Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Mine is, as far as I can see. Someone on this list told me otherwise, perhaps 10 months ago as I was getting ready to buy my first one. Said it was a single core. If hyperthreading in the bios is on, then it looks like a dual core. The D525MW looks like a 4 core if hyperthreading is on. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene If it's working, the diagnostics say it's fine. If it's not working, the diagnostics say it's fine. - A proposed addition to rules for realtime programming -- 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] First LinuxCNC machine - picking a computer
On Sat, 2 Jun 2012, gene heskett wrote: Date: Sat, 2 Jun 2012 00:19:45 -0400 From: gene heskett ghesk...@wdtv.com Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] First LinuxCNC machine - picking a computer On Saturday, June 02, 2012 12:17:02 AM andy pugh did opine: On 1 June 2012 23:54, gene heskett ghesk...@wdtv.com wrote: Not near as well as a box with a D525MW board in it, its dual core, the 510 is not. Mine is, as far as I can see. Someone on this list told me otherwise, perhaps 10 months ago as I was getting ready to buy my first one. Said it was a single core. If hyperthreading in the bios is on, then it looks like a dual core. The D525MW looks like a 4 core if hyperthreading is on. The D510 is dual core like the D525: http://ark.intel.com/products/43098/Intel-Atom-Processor-D510-%281M-Cache-1_66-GHz%29 the D410 (and D425) are single core Cheers, Gene Peter Wallace Mesa Electronics -- 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] Commutating Reactor
On Saturday, June 02, 2012 12:22:59 AM Jon Elson did opine: gene heskett wrote: On Friday, June 01, 2012 06:50:05 PM John Thornton did opine: I posted on the C(ommerical)NCZone and a guy there says those drives are rated for a 3% inductance wye isolation transformer. John BS alert there John. 3% of what? Without a frame of reference you may as well be shopping for a good used car. No, this is actually standard power engineering terminology. I don't recall the way this is measured, but it has a specific definition to a power EE. The basic concept is this % inductance tells you what the fault current and sag will be under particular loads. Sounds like another way to state equivalent series impedance or as applied to capacitors, equivalent series resistance, or ESR. 3%, from a solid 3 phase source wouldn't be so bad, but from a saggy RPC? 1% would be better, but would take more copper higher priced iron. But, of course, this refers to running the transformer from a stiff 3-phase mains supply, not a saggy rotary converter. Jon 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 Much of the excitement we get out of our work is that we don't really know what we are doing. -- E. Dijkstra -- 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
