Re: [Emc-users] Network Broadcast?
One of the few reliable solutions to broadcast a message over the network without concern about the operating system is either using a simple and stupid UDP package (however UDP broadcasts are blocked in many networks) or registering a MDNS service. Basically what you need is some Python code. Another option that may work. Use some kind of instant messaging client that supports dbus on Linux. Create a script that sends a message to a person (or listening machine) using the dbus interface. On the clients use whatever IM client you want. Regards Alexander On Thursday 05 February 2015 16:08:52 andy pugh wrote: Have I already asked this? It would be really nice if an M-code could send a network broadcast to all the machines on my local network (Mac, PC, Linux) to tell me that a machine needs attention. (At the moment that attention is unclamping the A-axis so that it can re-position the part) Any ideas? -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 6 February 2015 at 18:25, Gene Heskett ghesk...@wdtv.com wrote: I'd be quite amazed if someone actually builds a slip clutch on that sort of a scale where the thing might have 2+ tons to stop. I would expect to have to make it. Be amazed :-) The link I posted quotes Torque range 1 to 23000Nm. (that's 17,000 lb-ft) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
Is the table driven both ways during normal operation? If not, might the problem be solved by a simple drive/driven lug setup that would allow the table to continue to move. Of course the lugs would have to be reengaged after the event. If I missed this detail in the earlier posts, please excuse me. Raymond Julian Kettle River, MN The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest are the traits of success. And while men admire the quality of the first they love the produce of the second. -John Steinbeck, novelist, Nobel laureate (1902-1968) On 02/06/2015 12:39 PM, Viesturs Lācis wrote: 2015-02-06 20:25 GMT+02:00 Gene Heskett ghesk...@wdtv.com: I'd be quite amazed if someone actually builds a slip clutch on that sort of a scale where the thing might have 2+ tons to stop. I would expect to have to make it. It is supposed to rotate at 1 rad/s with 1 rad/s^2 acceleration. If my 3D modelling software is correct about the moment of inertia of the platform, then it would take ~375 Nm to achieve that. There will be 4,5:1 reduction ratio with double-row chain, so 100 Nm torque limiter on worm gearbox output shaft should do the trick (worm gearbox is also rated for 100 Nm, service factor 1,4, so it should be good to occasionally handle sudden increases of torque up to 100 Nm). All that is needed is to find some cost-effective torque limiter. -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On Friday, February 06, 2015 01:47:57 PM andy pugh wrote: On 6 February 2015 at 18:25, Gene Heskett ghesk...@wdtv.com wrote: I'd be quite amazed if someone actually builds a slip clutch on that sort of a scale where the thing might have 2+ tons to stop. I would expect to have to make it. Be amazed :-) The link I posted quotes Torque range 1 to 23000Nm. (that's 17,000 lb-ft) Viesters is gonna need a bigger truck... Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo Drive Help?
Well, this is a little excessive, it has been about 2years since I last tried to contact them, and about 6 since the first time (with a number of tries in between). I think it is safe to assume I am being officially (and quite effectively) ignored. - Original Message - From: Viesturs Lācis viesturs.la...@gmail.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Friday, February 6, 2015 8:15:20 AM Subject: Re: [Emc-users] Servo Drive Help? 2015-02-05 18:06 GMT+02:00 Todd Zuercher zuerc...@embarqmail.com: Does anyone know anything about one of these drives? http://www.easys.it/prod_file/azionamento_dc_ind.pdf I don't know Italian, and I have not been able to get any email response from the drive's manufacturer. Don't worry, that is common practice in italian companies. Last summer it took me 2 _months_ to get a correct invoice from Elte to purchase 3 standard spindle motors, it has been 2 or 3 weeks since I am waiting for a price quote for torque limiter - they replied quickly, asking additional details about my company, sent them everything and now they are gone. No offence to Alex and possibly any other italians on this list, but I have not seen for myself or heard about any italian company with prompt customer service. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 02/06/2015 07:26 AM, Viesturs Lācis wrote: Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs Try looking at agricultural power take off (PTO) parts. Rotary mowers, bush hogs, etc have them in the drivetrain to protect them when the operator hits a stump or rock. You may have to do some adapting. One way is to have a flanged hub on the shaft, a layer of friction material, a sprocket that is piloted on the hub, another friction plate, and a spring loaded plate to clamp it all together. Common on USA style PTO's. Ed. -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
Responding to: I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html I have one of these, mounted on a worm drive, it's sitting on my reuse shelf. Sorry that I am in the US, you could've just sent a pickup order. We used them for slide gate design that compensated for reversing time errors, This saved alot of keystock, key ways and chain, however, don't think it would not dent cars or crush bodies. -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 2/6/2015 11:25 AM, Gene Heskett wrote: Perhaps one could mount a small auto flywheel and clutch assembly on the bullgear output shaft, and drive the platform from the input shaft of the transmission that fits the disk by milling off the rear of the tramnsmission, and using the bell housing to hold maintain the shafts proper alignment under power? Just let the clutch disk slip a few degrees to act as the torque limiter you need. Interesting bit of what if... Automotive clutches have several coil springs arranged lengthwise around a circle. The hub and center of the disk assembly is built so it can rotate a little, independently of the outer part with the friction material. The springs dampen radial twisting when the clutch is engaged and during acceleration or deceleration. They also help dampen some engine vibration, which is a good thing for the bearings and gears in the transmission. A common mode of automotive clutch failure is those springs breaking, especially when a driver tends to drop the clutch too fast when taking off from a stop. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 2/6/2015 10:19 AM, andy pugh wrote: On 6 February 2015 at 17:11, Viesturs Lācis viesturs.la...@gmail.com wrote: I need torque limiter to protect the worm gearbox in case of power failure, Good thinking, people tend to forget about the stored energy in the system when making calculations. As my dad says (and he saw a _lot_ of broken machinery in his working life) There is no physical limit to the power you can extract from a flywheel How about a magnetic clutch that automatically disengages if the power fails? If it must not be allowed to run free, combine the magnetic clutch with a fluid coupling. Ramp up to speed with the fluid coupling then engage the clutch. In a power failure the clutch will let go while the fluid coupling keeps some torque transmission going to prevent one side or the other from slowing down too fast or possibly overspeeding. I was just looking at a PDF for Falk fluid couplings. Looks like they have some that are intended to be the only means of coupling a drive to a load. They'd have to be very robust to handle the heat from the slip that makes them work. Same principle as fluid limited slip couplings used in many full time all wheel drive systems in some cars and trucks. Love that in my 1998 Mountaineer. Any little slip in the back and the front grabs instantly and smoothly. Not useful for extreme off-roading. Stuff the front into a hole while the rear still has traction and it's just like a 2WD, stuck in the hole. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
I believe http://www.warnerelectric.com/torque-limiters.asp has european distribution too Dave On 06/02/2015, Viesturs Lācis viesturs.la...@gmail.com wrote: Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
Not sure, what do you mean. I need torque limiter to protect the worm gearbox in case of power failure, when it is rotating 2 ton platform, VFD would handle acceleration/deceleration during normal operation. Thank you, guys, for the links, already sent few enquiries, hopefully there will be some useful replies. Viesturs 2015-02-06 18:57 GMT+02:00 Nicklas Karlsson nicklas.karls...@karlssonwang.se: There is a strong correlation between torque and current in an Electric motor. For DC motors and servo motors it should be relatively simple to implement but I do not Think there is any simple solution to Control current in an ordinary cheap induction motor. Nicklas Karlsson Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Network Broadcast?
On Friday, February 06, 2015 11:21:16 AM andy pugh wrote: On 6 February 2015 at 13:16, John Thornton bjt...@gmail.com wrote: This is actually very easy to create a web page that auto refreshes with python and you just have that page open in your browser. I was looking for a push rather than pull notification. It is already fairly easy to watch the other machine with VNC or to log in with ssh -Y and pop up a few halmeters on the Mac to watch what is happening. Many years ago with Econet you could send a message to all connected computers, and I think you could do the same with Netware. I was hoping for something like that. We did have, have not used it recently, a method of broadcasting a -wall message that poped up an advisory on all locally connected machines. SO the guy in charge of the main server could tell everyone the system was going down for a reboot, or for whatever reason, in 5 minutes. Gave everyone time to finish their current work and get it saved before the system went away from their access. The thing is called wall, I have the manpage on another screen right now. Would that help? Cheers, Gene Heskett -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) Genes Web page http://geneslinuxbox.net:6309/gene US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 6 February 2015 at 17:11, Viesturs Lācis viesturs.la...@gmail.com wrote: I need torque limiter to protect the worm gearbox in case of power failure, Good thinking, people tend to forget about the stored energy in the system when making calculations. As my dad says (and he saw a _lot_ of broken machinery in his working life) There is no physical limit to the power you can extract from a flywheel -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Friction torque limiter
Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Network Broadcast?
Could you use a PHP generated html file that you monitor on the other computers over the LAN? JT On 2/5/2015 10:08 AM, andy pugh wrote: Have I already asked this? It would be really nice if an M-code could send a network broadcast to all the machines on my local network (Mac, PC, Linux) to tell me that a machine needs attention. (At the moment that attention is unclamping the A-axis so that it can re-position the part) Any ideas? -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Network Broadcast?
Andy, This is actually very easy to create a web page that auto refreshes with python and you just have that page open in your browser. If your interested in the details let me know. Saves typing if you've lost interest. JT On 2/5/2015 10:08 AM, andy pugh wrote: Have I already asked this? It would be really nice if an M-code could send a network broadcast to all the machines on my local network (Mac, PC, Linux) to tell me that a machine needs attention. (At the moment that attention is unclamping the A-axis so that it can re-position the part) Any ideas? -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Servo Drive Help?
2015-02-05 18:06 GMT+02:00 Todd Zuercher zuerc...@embarqmail.com: Does anyone know anything about one of these drives? http://www.easys.it/prod_file/azionamento_dc_ind.pdf I don't know Italian, and I have not been able to get any email response from the drive's manufacturer. Don't worry, that is common practice in italian companies. Last summer it took me 2 _months_ to get a correct invoice from Elte to purchase 3 standard spindle motors, it has been 2 or 3 weeks since I am waiting for a price quote for torque limiter - they replied quickly, asking additional details about my company, sent them everything and now they are gone. No offence to Alex and possibly any other italians on this list, but I have not seen for myself or heard about any italian company with prompt customer service. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
Check this out, http://www.emersonindustrial.com/en-US/powertransmissionsolutions/products/drive-components/torque-overload-devices/morse-torque-limiters/Pages/default.aspx On 2/6/2015 8:26 AM, Viesturs Lācis wrote: Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Thanks Rick Lair Superior Roll Turning LLC 399 East Center Street Petersburg MI, 49270 PH: 734-279-1831 FAX: 734-279-1166 www.superiorroll.com -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On 6 February 2015 at 13:26, Viesturs Lācis viesturs.la...@gmail.com wrote: Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. http://www.techdrives.co.uk/html/torque_limiters.html (just googling, I haven't used them) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Network Broadcast?
On 6 February 2015 at 17:22, Gene Heskett ghesk...@wdtv.com wrote: The thing is called wall, I have the manpage on another screen right now. That's close to what I had in mind, but requires the receiving computers to be logged in to the broadcaster. It still might work, but doesn't really win over remote desktop / VNC -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Network Broadcast?
On 6 February 2015 at 13:16, John Thornton bjt...@gmail.com wrote: This is actually very easy to create a web page that auto refreshes with python and you just have that page open in your browser. I was looking for a push rather than pull notification. It is already fairly easy to watch the other machine with VNC or to log in with ssh -Y and pop up a few halmeters on the Mac to watch what is happening. Many years ago with Econet you could send a message to all connected computers, and I think you could do the same with Netware. I was hoping for something like that. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
There is a strong correlation between torque and current in an Electric motor. For DC motors and servo motors it should be relatively simple to implement but I do not Think there is any simple solution to Control current in an ordinary cheap induction motor. Nicklas Karlsson Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Friction torque limiter
On Friday, February 06, 2015 12:11:45 PM Viesturs Lācis wrote: Not sure, what do you mean. I need torque limiter to protect the worm gearbox in case of power failure, when it is rotating 2 ton platform, VFD would handle acceleration/deceleration during normal operation. Thank you, guys, for the links, already sent few enquiries, hopefully there will be some useful replies. Viesturs Don't forget that in a worm drive, the drive is not normally reversible. IOW the worm, driven by the motor, and moving the table/plsatform, but if the motor stops from a power failure, it is up to the bull gear to have strong enough teeth to stop the platform in its tracks. A torque limitor between the bull gear and the 2 ton platform would need to have a pretty high limit, but not so high as to clear a few teeth off the bullgear or worm or both. How big are the gears, and how well anchored is the worm housing? AIUI, the harmonic drive is not as irreversable as the worm drive, but for something that heavy, it would be quite a bit larger/heavier/costly in comparison to the worm drive. Might it be possible to make a coupling using valve springs as the give element, in the same manner as the hub of an auto/truck clutch disk but on a 5x size scale? Something that would, if the drive freezes, allow the platform a few degrees of rotation to get stopped and bounce backwards to a resting point when the worm stops dead suddenly? The give of the valve springs would broaden the applied torque pulse enogh to save the gears. I'd be quite amazed if someone actually builds a slip clutch on that sort of a scale where the thing might have 2+ tons to stop. I would expect to have to make it. Perhaps one could mount a small auto flywheel and clutch assembly on the bullgear output shaft, and drive the platform from the input shaft of the transmission that fits the disk by milling off the rear of the tramnsmission, and using the bell housing to hold maintain the shafts proper alignment under power? Just let the clutch disk slip a few degrees to act as the torque limiter you need. Interesting bit of what if... It might be interesting to visit the scrap yard with your imagination working. 2015-02-06 18:57 GMT+02:00 Nicklas Karlsson nicklas.karls...@karlssonwang.se: There is a strong correlation between torque and current in an Electric motor. For DC motors and servo motors it should be relatively simple to implement but I do not Think there is any simple solution to Control current in an ordinary cheap induction motor. Nicklas Karlsson Hello! I would appreciate, if somebody could suggest European manufacturer/reseller for reasonably priced friction torque limiters. I mean someting like this: http://www.nuteckcouplings.com/torque-limiters.html The goal is to limit the max torque between sprocket and shaft to 100 Nm. I have tried contacting some italian manufacturers, but they do not seem to care to respond. I got an offer from a german manufacturer, but that seems too pricey, so I would like to find some other alternatives as well. Viesturs -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users --- --- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - - Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net
Re: [Emc-users] Friction torque limiter
2015-02-06 20:25 GMT+02:00 Gene Heskett ghesk...@wdtv.com: I'd be quite amazed if someone actually builds a slip clutch on that sort of a scale where the thing might have 2+ tons to stop. I would expect to have to make it. It is supposed to rotate at 1 rad/s with 1 rad/s^2 acceleration. If my 3D modelling software is correct about the moment of inertia of the platform, then it would take ~375 Nm to achieve that. There will be 4,5:1 reduction ratio with double-row chain, so 100 Nm torque limiter on worm gearbox output shaft should do the trick (worm gearbox is also rated for 100 Nm, service factor 1,4, so it should be good to occasionally handle sudden increases of torque up to 100 Nm). All that is needed is to find some cost-effective torque limiter. -- Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
