Re: [Emc-users] OT: 3D Printer Mods?
On 31 May 2012 04:41, Alex Hunt al...@ieee.org wrote: For me personally, I see an opportunity to contribute to an emerging field. I think it's worthwhile for that reason. An interesting exploration of where that might lead us is the novel Rule 34 by Charlie Stross. (albeit a rather dystopian view of a future where designs and not parts are exported around the world) -- 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 31 May 2012 02:29, fritz fritzli...@gmail.com wrote: As an electrician, I should now interject that a neutral should only be bonded at the point of distribution (the breaker panel or upstream transformer). The point we are discussing grounding is equivalent to the transformer you mention, I think. In this installation there is no ground associated with the power phases. -- 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?
2012/5/31 andy pugh bodge...@gmail.com: On 31 May 2012 04:41, Alex Hunt al...@ieee.org wrote: For me personally, I see an opportunity to contribute to an emerging field. I think it's worthwhile for that reason. An interesting exploration of where that might lead us is the novel Rule 34 by Charlie Stross. (albeit a rather dystopian view of a future where designs and not parts are exported around the world) I could agree to that, except that with all the internet and other technologies design is so much more easy to borrow without a permission, so IMHO the exports of actual parts will stay there for a while. And all those designs have to be materialized in form of some parts anyway, the question is just how and where it happens. -- 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] Commutating Reactor
That's a good idea, I don't hang out at the Zone any more but it's worth a shot. John On 5/30/2012 9:02 PM, Jon Elson wrote: John Thornton wrote: From the tone of the tech's voice he hears this problem a lot with 611 drive and rotary phase converters. Well, have you checked on CNCZone for any experiences with this system? maybe somebody there knows how to fix this problem. there are some VERY savvy machine techs there who have faced all sorts of crazy problems. 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 -- 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
As an electrician I would agree with you normally. When you leave the world of power distribution and enter the world of electronics the rules might change. In any case I know Andy was just pulling my leg. John On 5/30/2012 8:29 PM, fritz wrote: On 05/29/2012 12:07 PM, andy pugh wrote: On 29 May 2012 17:00, John Thorntonbjt...@gmail.com wrote: N to each X is.1 ohm X to X is .2 ohm That sounds like the tapping you needed. I would say earth it, put on rubber boots, rubber gloves and operate the machine with a long, dry stick :-) As an electrician, I should now interject that a neutral should only be bonded at the point of distribution (the breaker panel or upstream transformer). Grounding a neutral anywhere else makes for strange problems and stray currents on the ground. People often falsely assume electricity takes the path of least resistance - according to Ohm's law, it follows ALL paths in a parallel circuit. But hey, it's your cat and you can pick it up by the tail if you want. -- 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
Interestingly I had a bit of time last night and did some more voltage measurements with various bits turned on to load the RPC. RPC only running AB=245 BC=253 AC=253 With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245 With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=232 Adding the 308's spindle at 1000 RPM AB=244 BC=234 AC=229 Ramping up to 3000 RPM on the 308's spindle AB=244 BC=234 AC=227 So it appears I need to do a bit more tuning with the caps as the load is dragging down the voltage on the generated leg. Interestingly with the Samson running the BP 308 would start from 0 to a higher RPM than with it off even though the voltage had been pulled down by the Samson's spindle. I also tried adjusting some of the pots on the 611 spindle drive with no conclusive results from that experiment. I did hear back from the transformer guy Gene gave me the link to. Seems to be a fair price so I'll investigate that more as well as look at the diesel generator next week and do some more tuning on the RPC. Hi John, The cost for a 240 VAC 30A 3-phase isolation transformer is $1250. Factory lead time is approximately 4-5 weeks. If you need any additional information or would like to order the unit, please feel to contact me by phone or email. Regards, Jeff Jeff Weinberg Harbach Electronics, LLC John On 5/30/2012 2:58 PM, Dave wrote: I think the reason why they want a grounded neutral is to keep the phase voltages controlled relative to a ground reference. The drive chassis usually has several large ground lugs on it which are suppose to be tied to earth ground as would be the neutral. An ungrounded Delta power system can get out of control relative to earth ground. For instance, if for some reason one leg of a Delta goes to ground, the other two legs rise to a voltage equal to the line to line voltage away from ground. If you get an intermittent short between one Delta leg and ground, the voltages can swing all over the place relative to ground. That stresses any parts in the drive system which are referenced to frame ground. Back in the early 90's Siemens had one line of VFDs that had big problems blowing DC link capacitors. I was told that was because they were being used on ungrounded delta systems (used to be very common in industrial plants in the US) and if the Delta power source got out of wack, the capacitors would see high voltages to ground and explode. I saw a couple of them that literally blew apart the drive. That line of VFDs was short lived and they quickly changed their design. From the tone of the tech's voice he hears this problem a lot with 611 drive and rotary phase converters. The 611 drives are very popular. Many machine manufacturers used them for many years. Those guys have pretty much heard it all. Dave On 5/30/2012 3:19 PM, John Thornton wrote: When we ran the generator we connected the 3 hots as usual and I don't recall if we grounded it or not. I only had 3 connectors large enough for the leads coming out of the generator so I'm sure we didn't connect the ground to the neutral of the generator. http://cache.automation.siemens.com/dnl_iis/DA/DA0NDQz_59401543_HB/PJU_0212_en.pdf In that manual after a fault I have 4 status LED's lit up. On page 6-143 the bottom 4 LED's are lit. Which one caused the fault I can't tell. The machine schematic does not show a neutral connected at the stepup transformer and the infeed unit doesn't even have a neutral connection and neither does the machine. From the tone of the tech's voice he hears this problem a lot with 611 drive and rotary phase converters. John On 5/30/2012 1:12 PM, Jon Elson wrote: John Thornton wrote: I just got off the phone with Siemens tech support and Our systems don't run well on phase converters. Well, given the way this system works, I'm not surprised by his comment. But, it is fairly close. You need to get into it and see WHICH trip it is getting. There probably are several different sensing circuits (over-voltage, under-voltage, lost phase, etc.) and knowing which one is the source of the trip should be VERY helpful. Right now you are flying blind, not knowing whether it needs more or less voltage, etc. was the main theme of the conversation as well as we can't run on a Delta system because we need the ground reference I think he said. But, does the machine bring out the neutral? I think you said it does not, so his comment does not make sense. Well, given the way this system works, I'm not surprised by Additionally he suggested a Delta to WYE step up transformer with grounded secondaries between the RPC and the 611 Well, if there's no neutral brought out, that doesn't make sense. If it is SUPPOSED to have the neutral connected, and the wire has been removed when it was supposed to be connected, then suddenly, a LOT of things start to make sense. If it needs a neutral
Re: [Emc-users] Commutating Reactor
On Thursday, May 31, 2012 07:34:36 AM John Thornton did opine: Interestingly I had a bit of time last night and did some more voltage measurements with various bits turned on to load the RPC. RPC only running AB=245 BC=253 AC=253 With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245 With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=232 Adding the 308's spindle at 1000 RPM AB=244 BC=234 AC=229 Ramping up to 3000 RPM on the 308's spindle AB=244 BC=234 AC=227 The phase angles are shifting some. And the sag might mean you would have to go back to the 15 horse idler for the RPC. You said it was noisy, would fresh bearings help? OTOH, if its an open frame Ajax, they howl like fire sirens anyway. A 15 horse water pump we had as a backup at KXNE-TV, easily added 30 db to the noise level as it wasted at least a horse on internal cooling fans. I didn't think much of it, but it did get 1000 or more running hours without problems while we ordered up and installed seal kits in the other, much quieter pump. Klystron amplifiers need about 70 GPM of cooling water each when at full beam current, so between the 2 we were moving about 120 GPM. You don't scrimp on cooling those at $150,000 per cooling failure. A 3 phase Heineman breaker single phased the pump, I recognized the sound and my hand was about 1/2 way to the kill button when the building entrance breaker, 1200 amps/phase, went down like a 8 gage shotgun left me standing in the dark to contemplate my sins. One klystron full of water where it should have had a very good vacuum. The beam ate a hole in the anode bucket in less than a second. That of course crow barred the 20 kv beam supply, and things all went to hell from there. They had to call in a quorum of the unicameral legislature to buy me a replacement. How hot is the 10HP running after an hour with both loads on it? So it appears I need to do a bit more tuning with the caps as the load is dragging down the voltage on the generated leg. Interestingly with the Samson running the BP 308 would start from 0 to a higher RPM than with it off even though the voltage had been pulled down by the Samson's spindle. Things that make you go humm. I also tried adjusting some of the pots on the 611 spindle drive with no conclusive results from that experiment. I did hear back from the transformer guy Gene gave me the link to. Seems to be a fair price so I'll investigate that more as well as look at the diesel generator next week and do some more tuning on the RPC. Hi John, The cost for a 240 VAC 30A 3-phase isolation transformer is $1250. Factory lead time is approximately 4-5 weeks. If you need any additional information or would like to order the unit, please feel to contact me by phone or email. Regards, Jeff Jeff Weinberg Harbach Electronics, LLC John When you asked for the quote, did you include some extra primary taps so that a 5 to 10% step up/down could be done? That could turn out to be handier than sliced bread or bottled beer. There will be a cost associated with the taps of course. Whomever I talked to before, seemed to be a decent sort. And the stuff is top quality in my experience. [...] 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 Alex Haley was adopted! -- 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 31 May 2012 09:40, Viesturs Lācis viesturs.la...@gmail.com wrote: Rule 34 by Charlie Stross. I could agree to that, except that with all the internet and other technologies design is so much more easy to borrow without a permission, Pirate Hardware is pretty much the subject of the novel. -- 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
I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC motor. I might pull it apart today and order some new ones... I didn't measure the temperature of the 10hp and only ran a few minutes but I'll keep an eye on it. I didn't ask for taps on the transformer but it won't hurt to find out the price. Input taps for 220 and 240? How is the encoder disk coming along? John On 5/31/2012 7:21 AM, gene heskett wrote: On Thursday, May 31, 2012 07:34:36 AM John Thornton did opine: Interestingly I had a bit of time last night and did some more voltage measurements with various bits turned on to load the RPC. RPC only running AB=245 BC=253 AC=253 With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245 With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=232 Adding the 308's spindle at 1000 RPM AB=244 BC=234 AC=229 Ramping up to 3000 RPM on the 308's spindle AB=244 BC=234 AC=227 The phase angles are shifting some. And the sag might mean you would have to go back to the 15 horse idler for the RPC. You said it was noisy, would fresh bearings help? OTOH, if its an open frame Ajax, they howl like fire sirens anyway. A 15 horse water pump we had as a backup at KXNE-TV, easily added 30 db to the noise level as it wasted at least a horse on internal cooling fans. I didn't think much of it, but it did get 1000 or more running hours without problems while we ordered up and installed seal kits in the other, much quieter pump. Klystron amplifiers need about 70 GPM of cooling water each when at full beam current, so between the 2 we were moving about 120 GPM. You don't scrimp on cooling those at $150,000 per cooling failure. A 3 phase Heineman breaker single phased the pump, I recognized the sound and my hand was about 1/2 way to the kill button when the building entrance breaker, 1200 amps/phase, went down like a 8 gage shotgun left me standing in the dark to contemplate my sins. One klystron full of water where it should have had a very good vacuum. The beam ate a hole in the anode bucket in less than a second. That of course crow barred the 20 kv beam supply, and things all went to hell from there. They had to call in a quorum of the unicameral legislature to buy me a replacement. How hot is the 10HP running after an hour with both loads on it? So it appears I need to do a bit more tuning with the caps as the load is dragging down the voltage on the generated leg. Interestingly with the Samson running the BP 308 would start from 0 to a higher RPM than with it off even though the voltage had been pulled down by the Samson's spindle. Things that make you go humm. I also tried adjusting some of the pots on the 611 spindle drive with no conclusive results from that experiment. I did hear back from the transformer guy Gene gave me the link to. Seems to be a fair price so I'll investigate that more as well as look at the diesel generator next week and do some more tuning on the RPC. Hi John, The cost for a 240 VAC 30A 3-phase isolation transformer is $1250. Factory lead time is approximately 4-5 weeks. If you need any additional information or would like to order the unit, please feel to contact me by phone or email. Regards, Jeff Jeff Weinberg Harbach Electronics, LLC John When you asked for the quote, did you include some extra primary taps so that a 5 to 10% step up/down could be done? That could turn out to be handier than sliced bread or bottled beer. There will be a cost associated with the taps of course. Whomever I talked to before, seemed to be a decent sort. And the stuff is top quality in my experience. [...] 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] Usefulness - was Re: OT: 3D Printer Mods?
Michael; So while I wander past the rapidly increasing number of 3D printers at SIGGRAPH, for instance, I currently can't find a use for one that I can afford to have @home. might be the wrong trade show have a look dental work, or moldmaking in the jewelry trade Very good point. Thank you. 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
[Emc-users] Usefulness - was Re: OT: 3D Printer Mods?
I think it's important to evaluate on the usefulness of a tool, within the design scope of that tool. Due to the nature of our business (fast turn, low volume, high mix parts, often called prototypes) we have a variety of tools in our shops, not just one hammer. I have a Mazak mill, a Tsugami lathe (retrofitted to LCNC), a small HF mini mill (also LCNC), a ULS laser cutter/engraver, and a Dimension 1200 FDM 3d printer, amongst other things. I use the 3d printer a LOT. We probably push about $5k in consumables a year through it. It's ABS material, relatively tough, and a good standin for passing quick prorotypes around the table. There are parts that one can draw in CAD and click print faster, not having to worry about fixturing, than one can push into CAM, create machining operations, figure out a workholding and tool strategy, monitor the cut, perform secondary operations, and hope you got it right. I do push what are considered the limits of FDM - in fact a lot of my parts are so organic in nature that the 3d printed parts become the actual production parts. An on-demand printed part 6 times a year doesn't justify creating injection mold tooling, and often where weight is an issue, cutting from steel or aluminum billet also isn't appropriate. I've used it to make single piece chain sprockets in a pinch where the needed part just wasn't available off the shelf. It ran for 5 days, which was 4 days longer than it needed to. That said, if the part demands material that isn't compatible with ABS, then 3d printing isn't appropriate. Agreed, you cannot take a micrometer to these parts and expect every feature to measure net zero accuracy. There is a learning curve to each machine on where to redraw a feature over or undersize, and to consider secondary operations. If you want a 0.3210 diameter hole, be prepared to ream it. Even grander however, is the large variety of 3d printing tools out there - I'm still very partial to SLA, but it's still incredibly expensive. (although DLP polymer is becoming reality). I've had the ZCorp powder printers, but the post-processing is exhausting, messy, and very limited in application. FDM (such as Stratasys and the extruder rep-raps) is a nice middle ground that in many cases, I can produce parts that literally just pop off the tray and go to finishing. If I needed sintering, I sent it out. All two times. What I really like though is that I can use the laser cutter and the 3d printer together to produce workholding fixtures that can hold a part for machining in the mill or on the lathe. The largest distribution of parts that come out of our 3d printer are either custom fixtures or patterns for casting. It is however very true that although the hardware or technology in many units is close to identical, the software or secondary features either makes or breaks a product. I have an early Darwin (reprap) from handmade parts, that has sat in a corner (probably smushed now) for a long time, because the software didn't keep up with the technology early on and the glitter wore off. Commercial technology came and filled the void. I wouldn't want to compare parts from the reprap to the Dimension - they're $50k apart in capabilities. The current crop of thing-o's with dual extruders will eventually catch up once builders copy the tricks that the commercial guys learned only through their own development. Some of those tricks relate to dimensional tolerances (you're adding physical fluid material, in a space that may already have material, as opposed to machining to zero, so particular decisions have to be made on the order of laying down that material and physical offsets versus cooling time). Some are omissions to simplify a product - the heated enclosed chambers that Stratasys use I feel are an essential part of the process; the open frames of repraps don't allow the deposited filament to anneal slowly and reduce the layer artifacts. You can easily tell a commercial part form a Hobby one. But that's common to all fabrication technologies. Even then, 3dp isn't a Fits all tool. Will a singular technology exist on the kitchen counter to make everything you need? Probably not. But then, I've never been one to stir my coffee with a hammer, either. Cheers, Ted. -- 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 also replaced my 15HP TEFC bearings with a pair from ebay. Been quiet ever since. The fan-end bearing was frozen and the balls were gliding on a grease film against the inner race. It was noisy so I finally swapped them out. Dennis ---Original Message--- From: John Thornton bjt...@gmail.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Commutating Reactor Sent: May 31 '12 07:51 I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC motor. I might pull it apart today and order some new ones... -- 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
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
Re: [Emc-users] Commutating Reactor
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 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] Usefulness - was Re: OT: 3D Printer Mods?
Hi Joseph; John, I can tell you for sure that the parts end up being much stronger than you might at first guess from being printed hollow. That isn't to say that they are indestructable -- but I was skeptical at first, too. The application you mentioned is actually perfect for 3D printing -- the various one-off'ish bits and bobs that you would rather not spend much time tooling up to make. I absolutely agree with the whole issue of 3D printing, so my personal issues are more to deal with my specific application than with the process. Just an FYI; I make 1:16 and 1:8 scale steam locomotives; soft plumbers solder does not hold up well on most parts of the locomotive. I've had issues, and have seen some messes when people used soft solder for detail work. For sealing water containers (locomotive tenders, etc) soft solder is ok. These things have coal fires that glow orange when running, and the water in them is at about 170 degrees c. and do indeed get hot. Just fyi; right now my silver soldering of a copper boiler outside (hope to complete 2 this summer) is with Easy flo 45; it melts at 1125 degrees f; 605 degrees c. In shade, the copper sheet glows cherry red/orange, and brass will melt not much higher than that - I have melted brass components by accident before. (whoops…) I think we are all on the same side of the fence here, just waiting for technology to catch up to all of our needs/price points. 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] Commutating Reactor
Hi Dave, I have not found that the rotary phase converter slows in RPM during high low demands as it is still an asynchronous AC motor and is there is no torque demand on the motor shaft. I don't think a flywheel would help here. If it were physically connected to a 3-ph generator it would be another story and the 15HP motor would look more like a 10HP from a shaft stand point when run from single phase. A larger rotary phase converter would help though. Sounds like your machine is sensitive enough that a 25-40HP rotary phase motor may be be necessary to get the impedance closer to that of the grid. Adding more 3-phase motors to the system lowers the impedance of the WYE and helps to stabilize the wild leg as demonstrated with the lathe motor. I'm entertaining the thought of adding a 15HP motor to mine if I find a cheap one. Dennis ---Original Message--- From: Dave e...@dc9.tzo.com To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Commutating Reactor Sent: May 31 '12 09:43 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 -- 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 Thu, 2012-05-31 at 10:08 -0500, ceen...@in-front.com wrote: ... snip I have not found that the rotary phase converter slows in RPM during high low demands as it is still an asynchronous AC motor ... ... snip It's the velocity variation during a revolution that comes into play, although I haven't measured this so I can't back this up with data. Since only one phase produces momentum, the two generated phases draw energy from the rotating mass and slow it down. Increasing rotating mass increases the amount of energy available and should also increase the amount of input current capacity to replace the converted energy. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Commutating Reactor
I've caused my 10hp to grunt with a big load and it appears to slow down then get back up to speed. I've drawn my 3hp RPC down so far the potential relay kicked the start caps back in... it was at that point I knew I could not run my Enco in high speed from the 3hp RPC. The 15hp has a sizable 6 belt pulley as a flywheel and I've never heard it grunt when applying a load. On 5/31/2012 10:45 AM, Kirk Wallace wrote: On Thu, 2012-05-31 at 10:08 -0500, ceen...@in-front.com wrote: ... snip I have not found that the rotary phase converter slows in RPM during high low demands as it is still an asynchronous AC motor ... ... snip It's the velocity variation during a revolution that comes into play, although I haven't measured this so I can't back this up with data. Since only one phase produces momentum, the two generated phases draw energy from the rotating mass and slow it down. Increasing rotating mass increases the amount of energy available and should also increase the amount of input current capacity to replace the converted energy. -- 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 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 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
My phase converter is based on a 10 hp, 200 volt 3 phase motor (odd voltage, but it was cheap). I have a 10 hp 3 phase compressor that I run once in a while off that phase converter and when the starter on the compressor kicks in the phase converter slows noticably and almost grunts.. With smaller motors the effect is not noticeable. A spinning 3 phase asynchronous motor will act as a generator briefly when a load (like a another motor) is placed on the same line.That is why a rotary phase converter is preferable to a static phase converter. The rotary phase converter rotors flywheel effect helps start up the motor you are trying to start. I used to do short circuit and breaker coordination studies on General Motors electrical power systems ( my college thesis was on that subject - this was just after the stone age) and spinning motors contributes greatly to short circuit currents during a system fault as they all turn into generators temporarily and pump current/power back into the power lines. Dave On 5/31/2012 11:08 AM, ceen...@in-front.com wrote: Hi Dave, I have not found that the rotary phase converter slows in RPM during high low demands as it is still an asynchronous AC motor and is there is no torque demand on the motor shaft. I don't think a flywheel would help here. If it were physically connected to a 3-ph generator it would be another story and the 15HP motor would look more like a 10HP from a shaft stand point when run from single phase. A larger rotary phase converter would help though. Sounds like your machine is sensitive enough that a 25-40HP rotary phase motor may be be necessary to get the impedance closer to that of the grid. Adding more 3-phase motors to the system lowers the impedance of the WYE and helps to stabilize the wild leg as demonstrated with the lathe motor. I'm entertaining the thought of adding a 15HP motor to mine if I find a cheap one. Dennis ---Original Message--- From: Davee...@dc9.tzo.com To: emc-users@lists.sourceforge.net Subject: Re: [Emc-users] Commutating Reactor Sent: May 31 '12 09:43 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 -- 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
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 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.
Re: [Emc-users] Commutating Reactor
On Thursday, May 31, 2012 11:28:24 AM John Thornton did opine: I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC motor. I might pull it apart today and order some new ones... I didn't measure the temperature of the 10hp and only ran a few minutes but I'll keep an eye on it. I didn't ask for taps on the transformer but it won't hurt to find out the price. Input taps for 220 and 240? Since the existing autoformer has taps for 208, 220 and 240, I'd say an extra at 220, so you could use it for a 220 to 240 step up, or conversely swap primary secondary use it for a 240 to 220 step down would cover the options nicely when combined with the autoformers own taps. The N terminal on the existing autoformer can then be taken back to neutral in the service, thereby forcing the secondary side to become neutral referenced. If this tranny comes with N connections on both windings, the N connection on whatever winding is used for drive to the existing autoformer could also be tied to this neutral run, but that would be more for correctness than any real advantage since it's the N terminal of the OEM autoformer that counts here. I'd check my copy of the NEC, but it's either grown legs or belonged to the tv station. In any event its a '98 issue and could be obsolete. I haven't stumbled over it in 3 or 4 years. How is the encoder disk coming along? John On 5/31/2012 7:21 AM, gene heskett wrote: So-so. I, took that printout out there yesterday, but being somewhat fam with the old code, and having a supply of #58 #60 pcb drills, I massaged that code for the smaller bits and tried to make a 60 slot encoder, then, trying to get the exec time down (its about 2.75 hours with that small a bit) I pushed too hard broke the last #58, so I slowed down a bit more. So I've broken about $35 worth of bits now to get one poorly cut disk. I added a duty cycle fudge value where the original code just divided by 2.0. Since mulls are faster, the disk I made yesterday now has a mull by duty_cycle, with duty cycle at .45. Next one will be at .40 to equalize the opto outputs to 50%, they were about 57/43 when I put it on the lathe. I have the A/B slot ring about correct if I reduce the duty cycle from .45 to .40, I should get pretty close to a 50% duty cycle out of the opto devices. I can bend them back and forth perhaps 10 thou to fine tune the quadrature timing, or adjust the slot count one way or the other by one count. But I think I am going to have to dig another 5 thou deeper into the piece of oil soaked oak used for sacrificial in order to remove the last vestiges of the fact that its not an end mill, but a drill bit with fairly steep angles. It left a fin at the bottom of the slot. Going from 39 to 60 slots, I had to adjust the encoder's scale negate it but that was half expected. And I have too much gain, the speed is hunting about 10%. Then, I am going to have to separate the slot cutting and inner hole cutout from each other in the codes looping so this thinner stuff has less opportunity to flex, and after fighting with the index slot, trying to maintain its tapered shape, it occurred to me that a simple slot perhaps a thou wider than the bit itself is all that needs since I don't think it needs a specific timeing reference the A/B slot ring. So that is the next change for this code. The .001 off line movement there is about the limit of my mill, but would be intended to assure that only one edge of the drill is doing the cutting. When both edges cut, the cut isn't as clean as the bit flexes. I ordered another 5 pack of each bit size yesterday. $89. Another thing that I question is the math that does the tapering of the slots, I have a feeling its not quite right, but cannot put my finger on it. That is about a screen full of code in vim all by itself just to make the 5 moves that carve the slot at each depth increment, and the last movement should be to the origin of the end of the first movement, but there is a small gap when you zoom in the backplot to look at slot 0 and the index or to any individual slot. The error is at least consistent though so should be fixable. I haven't started on that yet for today, I need to make a trip out to get some blood pressure anti-sugar pills some groceries first. And since the temps are decent, I need to fire up the weed eater finish trimming my jungle too. And when I do get to the shop, from the looks of things in the mills head, I need to replace one of those plastic gears, a hub is starting to break out and the gear rim is flopping up down about 1/16 with attendant rattling noises. There was, 10 years ago, a belt drive kit for this thing that gave a max rpm of 5000 but that was discoed several years ago. Damnit... If they ever get my nose cleaned up for good, I'd like to get a G0704 a ball screw kit for it, it would *2 my xy envelope. Z I have lots of thanks to
Re: [Emc-users] Commutating Reactor
On Thursday, May 31, 2012 12:53:37 PM John Thornton did opine: 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. That is certainly progress in the right direction, John. You can actually get money making work done. And that I believe is the object of this exercise, is it not? Thanks for all the help and ideas. 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 I waited and waited and when no message came I knew it must be from you. -- 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
John Thornton wrote: RPC only running AB=245 BC=253 AC=253 With the BP 308 (Simodrive 611) powered up AB=245 BC=245 AC=245 With the Samson 7.5hp manual lathe spindle at 660 RPM AB=244 BC=232 Adding the 308's spindle at 1000 RPM AB=244 BC=234 AC=229 Ramping up to 3000 RPM on the 308's spindle AB=244 BC=234 AC=227 So it appears I need to do a bit more tuning with the caps as the load is dragging down the voltage on the generated leg. Interestingly with the Samson running the BP 308 would start from 0 to a higher RPM than with it off even though the voltage had been pulled down by the Samson's spindle. Yup, you need a setting that gives the best balance over a RANGE of loads, from no-load to worst-case. Adding the Samson lathe is essentially adding another large idler motor, and may improve the balance under the worst-case load. If you can get the generated leg to sag less under this load without surging too high at no-load, you may solve the problem. 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
[Emc-users] G92
I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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
John Thornton wrote: 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. The sagging of the A-C voltage under load and the trip when starting the lathe point in the same direction. If the Simodrive has individual sensing of each line, it may be detecting that one is too low. Otherwise, it may be detecting too much ripple on the DC bus, as it doesn't get much charge from the sagged line. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. 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] Commutating Reactor
John Thornton wrote: $64 question will the isolation transformer do the same thing the 7.5hp spindle motor is doing on the Samson? No, I do not think so. You may be able to tune this better with caps so the generated leg runs a bit high at no load, and sags less at high load, and that may keep the control happy. Or, you may need to add another idler motor to the system. Re. my comment about the filter caps. Has this problem slowly been getting worse over time - like a few years? If so, then it strongly suggests that the filter caps are going out, slowly. How old is this machine? 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] Commutating Reactor
Are the servo drives 3-phase as well? If not it may be cheaper to replace the spindle drive with one that is a bit less touchy. My Colchester Triumph 2000 CNC lathe has an inverter designed to run off 415V 3-ph. I use a step-up transformer to take my 230V single phase mains up to 415V single phase. I just feed two of the phase inputs and leave the third unconnected. You do need to derate the inverter if you do this as it stresses the filter capacitors and input rectifier. I never use full spindle power (10hp) so I get away with using the original inverter. I also need to limit the spindle acceleration in top gear with a 10 chuck otherwise I blow my main fuse. This setup has been working for 2+ years with no problems. Another, rather expensive, solution is to use an inverter plus a sinewave filter. This produces almost perfect 3-phase. These inverters are 240V in, 415 out but I am sure they are also available 110V in or whatever your local voltage is. http://stores.ebay.co.uk/Drives-Direct-Inverters-LTD/DIGITAL-240-TO-415-INVERTERS-/_i.html?_fsub=5_sid=60949062_trksid=p4634.c0.m322. The sine wave filters clean up the inverter output and output a waveform that is nearly as clean as proper 3-ph mains. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. That is a possibility that is worth investigating. Some drive manufacturers even recommend changing these periodically. Les On 31/05/2012 18:27, Jon Elson wrote: The sagging of the A-C voltage under load and the trip when starting the lathe point in the same direction. If the Simodrive has individual sensing of each line, it may be detecting that one is too low. Otherwise, it may be detecting too much ripple on the DC bus, as it doesn't get much charge from the sagged line. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. 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] Commutating Reactor
On 5/31/2012 1:33 PM, Jon Elson wrote: John Thornton wrote: $64 question will the isolation transformer do the same thing the 7.5hp spindle motor is doing on the Samson? No, I do not think so. You may be able to tune this better with caps so the generated leg runs a bit high at no load, and sags less at high load, and that may keep the control happy. Or, you may need to add another idler motor to the system. Re. my comment about the filter caps. Has this problem slowly been getting worse over time - like a few years? If so, then it strongly suggests that the filter caps are going out, slowly. How old is this machine? 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 I think that John swapped out the caps in this power supply when he first got this machine and starting having problems. With all of the hybrid cars running around these days, I wonder if it wouldn't be possible to tap into the car's DC bus, attach an inverter and come up with an handy 25 KW or so 3 phase power supply. That might convince me that a hybrid vehicle could actually be useful. I think that some of these hybrids are running on 300+ volt DC bus systems. For now a diesel generator might be cheaper, but sooner or later these hybrids are going to be coming down in price as the gloss wears off and the vehicles age. 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] G92
On 31 May 2012 18:29, mjb1...@gmail.com wrote: This all works as expected, but I've read that using G92 is not a good idea. I wonder why? There is the option of coding your pattern as relative moves, I suppose. But I use G92. -- 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
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 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
Re: [Emc-users] Commutating Reactor
Are you tapering the slots so the edges are perpendicular to the center? 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 On 5/31/2012 11:46 AM, gene heskett wrote: On Thursday, May 31, 2012 11:28:24 AM John Thornton did opine: I'm sure fresh bearings would help the 15hp and it is a heavy duty TEFC motor. I might pull it apart today and order some new ones... I didn't measure the temperature of the 10hp and only ran a few minutes but I'll keep an eye on it. I didn't ask for taps on the transformer but it won't hurt to find out the price. Input taps for 220 and 240? Since the existing autoformer has taps for 208, 220 and 240, I'd say an extra at 220, so you could use it for a 220 to 240 step up, or conversely swap primary secondary use it for a 240 to 220 step down would cover the options nicely when combined with the autoformers own taps. The N terminal on the existing autoformer can then be taken back to neutral in the service, thereby forcing the secondary side to become neutral referenced. If this tranny comes with N connections on both windings, the N connection on whatever winding is used for drive to the existing autoformer could also be tied to this neutral run, but that would be more for correctness than any real advantage since it's the N terminal of the OEM autoformer that counts here. I'd check my copy of the NEC, but it's either grown legs or belonged to the tv station. In any event its a '98 issue and could be obsolete. I haven't stumbled over it in 3 or 4 years. How is the encoder disk coming along? John On 5/31/2012 7:21 AM, gene heskett wrote: So-so. I, took that printout out there yesterday, but being somewhat fam with the old code, and having a supply of #58 #60 pcb drills, I massaged that code for the smaller bits and tried to make a 60 slot encoder, then, trying to get the exec time down (its about 2.75 hours with that small a bit) I pushed too hard broke the last #58, so I slowed down a bit more. So I've broken about $35 worth of bits now to get one poorly cut disk. I added a duty cycle fudge value where the original code just divided by 2.0. Since mulls are faster, the disk I made yesterday now has a mull by duty_cycle, with duty cycle at .45. Next one will be at .40 to equalize the opto outputs to 50%, they were about 57/43 when I put it on the lathe. I have the A/B slot ring about correct if I reduce the duty cycle from .45 to .40, I should get pretty close to a 50% duty cycle out of the opto devices. I can bend them back and forth perhaps 10 thou to fine tune the quadrature timing, or adjust the slot count one way or the other by one count. But I think I am going to have to dig another 5 thou deeper into the piece of oil soaked oak used for sacrificial in order to remove the last vestiges of the fact that its not an end mill, but a drill bit with fairly steep angles. It left a fin at the bottom of the slot. Going from 39 to 60 slots, I had to adjust the encoder's scale negate it but that was half expected. And I have too much gain, the speed is hunting about 10%. Then, I am going to have to separate the slot cutting and inner hole cutout from each other in the codes looping so this thinner stuff has less opportunity to flex, and after fighting with the index slot, trying to maintain its tapered shape, it occurred to me that a simple slot perhaps a thou wider than the bit itself is all that needs since I don't think it needs a specific timeing reference the A/B slot ring. So that is the next change for this code. The .001 off line movement there is about the limit of my mill, but would be intended to assure that only one edge of the drill is doing the cutting. When both edges cut, the cut isn't as clean as the bit flexes. I ordered another 5 pack of each bit size yesterday. $89. Another thing that I question is the math that does the tapering of the slots, I have a feeling its not quite right, but cannot put my finger on it. That is about a screen full of code in vim all by itself just to make the 5 moves that carve the slot at each depth increment, and the last movement should be to the origin of the end of the first movement, but there is a small gap when you zoom in the backplot to look at slot 0 and the index or to any individual slot. The error is at least consistent though so should be fixable. I haven't started on that yet for today, I need to make a trip out to get some blood pressure anti-sugar pills some groceries first. And since the temps are decent, I need to fire up the weed eater finish trimming my jungle too. And when I do get to the shop, from the looks of things in the mills head, I need to replace one of those plastic gears, a hub is starting to break out and the gear rim is flopping up down about 1/16 with attendant rattling noises. There was, 10
Re: [Emc-users] Commutating Reactor
Well that and for fun too... but I do have a backlog of money to make... John On 5/31/2012 11:56 AM, gene heskett wrote: On Thursday, May 31, 2012 12:53:37 PM John Thornton did opine: 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. That is certainly progress in the right direction, John. You can actually get money making work done. And that I believe is the object of this exercise, is it not? Thanks for all the help and ideas. 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
Not too long ago I replaced every cap in the infeed unit, so I know they are all fresh. John On 5/31/2012 12:27 PM, Jon Elson wrote: John Thornton wrote: 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. The sagging of the A-C voltage under load and the trip when starting the lathe point in the same direction. If the Simodrive has individual sensing of each line, it may be detecting that one is too low. Otherwise, it may be detecting too much ripple on the DC bus, as it doesn't get much charge from the sagged line. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. 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 -- 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] G92
Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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
I'm not sure what the drives are as they are all in one modular unit and have interconnecting communications between the infeed unit and all the drives. My local voltage is 240 on the mains with 120 to neutral. I've not seen any inverters designed to take single phase in larger than 3hp, I have in the past long ago do the single phase in three phase out trick on over sized inverters. John On 5/31/2012 12:55 PM, Les Newell wrote: Are the servo drives 3-phase as well? If not it may be cheaper to replace the spindle drive with one that is a bit less touchy. My Colchester Triumph 2000 CNC lathe has an inverter designed to run off 415V 3-ph. I use a step-up transformer to take my 230V single phase mains up to 415V single phase. I just feed two of the phase inputs and leave the third unconnected. You do need to derate the inverter if you do this as it stresses the filter capacitors and input rectifier. I never use full spindle power (10hp) so I get away with using the original inverter. I also need to limit the spindle acceleration in top gear with a 10 chuck otherwise I blow my main fuse. This setup has been working for 2+ years with no problems. Another, rather expensive, solution is to use an inverter plus a sinewave filter. This produces almost perfect 3-phase. These inverters are 240V in, 415 out but I am sure they are also available 110V in or whatever your local voltage is. http://stores.ebay.co.uk/Drives-Direct-Inverters-LTD/DIGITAL-240-TO-415-INVERTERS-/_i.html?_fsub=5_sid=60949062_trksid=p4634.c0.m322. The sine wave filters clean up the inverter output and output a waveform that is nearly as clean as proper 3-ph mains. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. That is a possibility that is worth investigating. Some drive manufacturers even recommend changing these periodically. Les On 31/05/2012 18:27, Jon Elson wrote: The sagging of the A-C voltage under load and the trip when starting the lathe point in the same direction. If the Simodrive has individual sensing of each line, it may be detecting that one is too low. Otherwise, it may be detecting too much ripple on the DC bus, as it doesn't get much charge from the sagged line. It is possible the DC filter caps are going out, and replacing these caps would make it run reliably even as is. 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 -- 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] G92
Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thornton bjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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] G92
That is a very old link and is no longer there. The online docs are here: http://linuxcnc.org/index.php/english/documentation On 5/31/2012 2:37 PM, Viesturs Lācis wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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
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 Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions
Re: [Emc-users] G92
Thank You! Any chance to put redirect or something? I was brought to that link by goole Viesturs 2012/5/31 John Thornton bjt...@gmail.com: That is a very old link and is no longer there. The online docs are here: http://linuxcnc.org/index.php/english/documentation On 5/31/2012 2:37 PM, Viesturs Lācis wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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 -- 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] G92
It was this thread that made me question it: http://www.cnczone.com/forums/haas_mills/22872-g92.html I was also confused by the tutorial for CNC Simulator http://cncsimulator.com/blog/?page_id=102 This starts a program G92 X30 Y30 Z20 T1 M6 G0 X15 Y15 Z2 Assuming the simulator starts at machine X0 Y0 X0 I think this should take you to machine X-15 Y-15 Z-18 Unless I've misunderstood G92 I think the simulator is wrong. Mike On 31 May 2012, at 20:37, Viesturs Lācis viesturs.la...@gmail.com wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thornton bjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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] G92
That is just stale goo cash I assume... none of the old links are any good due to the restructuring of the manuals for 2.5. Best is to use the goo site search like this G21 site:linuxcnc.org John On 5/31/2012 3:29 PM, Viesturs Lācis wrote: Thank You! Any chance to put redirect or something? I was brought to that link by goole Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: That is a very old link and is no longer there. The online docs are here: http://linuxcnc.org/index.php/english/documentation On 5/31/2012 2:37 PM, Viesturs Lācis wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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 -- 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] G92
yea, non of those pertain to LinuxCNC... I have started a LinuxCNC G code tutorial but it is in it's quite small but is for LinuxCNC exclusively. John On 5/31/2012 3:43 PM, Mike Bennett wrote: It was this thread that made me question it: http://www.cnczone.com/forums/haas_mills/22872-g92.html I was also confused by the tutorial for CNC Simulator http://cncsimulator.com/blog/?page_id=102 This starts a program G92 X30 Y30 Z20 T1 M6 G0 X15 Y15 Z2 Assuming the simulator starts at machine X0 Y0 X0 I think this should take you to machine X-15 Y-15 Z-18 Unless I've misunderstood G92 I think the simulator is wrong. Mike On 31 May 2012, at 20:37, Viesturs Lācisviesturs.la...@gmail.com wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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 -- 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] G92
Indeed. As G92 does what it says on the LinuxCNC tin, I plan to keep on using it. I'll probably end up rebuilding my Windows PC so I can dual boot and use LinuxCNC as my simulator. Mike On 31 May 2012, at 22:00, John Thornton bjt...@gmail.com wrote: yea, non of those pertain to LinuxCNC... I have started a LinuxCNC G code tutorial but it is in it's quite small but is for LinuxCNC exclusively. John On 5/31/2012 3:43 PM, Mike Bennett wrote: It was this thread that made me question it: http://www.cnczone.com/forums/haas_mills/22872-g92.html I was also confused by the tutorial for CNC Simulator http://cncsimulator.com/blog/?page_id=102 This starts a program G92 X30 Y30 Z20 T1 M6 G0 X15 Y15 Z2 Assuming the simulator starts at machine X0 Y0 X0 I think this should take you to machine X-15 Y-15 Z-18 Unless I've misunderstood G92 I think the simulator is wrong. Mike On 31 May 2012, at 20:37, Viesturs Lācisviesturs.la...@gmail.com wrote: Little OT, regarding homepage: I got curious to find out, what exactly does G92 do and went to search the web. I found out that this page is not accessible: http://linuxcnc.org/docs/html/gcode_main.html Is the link not correct or is there something wrong? Viesturs 2012/5/31 John Thorntonbjt...@gmail.com: Dunno where you read that but I use G92 for every cutting operation on my plasma table... making sure to clear them when done. I jog to the start point and that becomes XY 0 for the duration of the cut. John On 5/31/2012 12:29 PM, mjb1...@gmail.com wrote: I've written a subroutine that starts G92 X0 Y0 performs a task at the current location and ends G92.2 I can the go to a locaction and call the subroutine. This all works as expected, but I've read that using G92 is not a good idea. Is there a better way? Mike -- 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 -- 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 -- 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
Re: [Emc-users] Commutating Reactor
On Thursday, May 31, 2012 11:27:21 PM John Thornton did opine: 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? Only to the extent that the smaller one is big enough, 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 Just about every computer on the market today runs Unix, except the Mac (and nobody cares about it). -- Bill Joy 6/21/85 -- 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 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 -- 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 Just about every computer on the market today runs Unix, except the Mac (and nobody cares about it). -- Bill Joy 6/21/85 -- 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
