On Tuesday 30 December 2014 16:23:13 Greg Bentzinger did opine And Gene did reply:
And I CC'd the list, as others may be interested in the conversation too. > http://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2 > 012/08/KL23H286-20-8B.pdf I did find that, but this one is marked as a 266, not 286. And my drivers can do 4.2 amps, however that would equal fried motor in short order at the lower rpms used for working speeds. I tried it once at 3.3, and took a room temp motor to way too hot to touch without a potholder in about 5 minutes. You are of course right, while I can get 3500+ revs out of it, that 2.3 amps, or 2.8 amps, is in no danger of overheating the motor as its only showing around .7 amps at that speed, waaaaayyyy too much inductance. IOW turning up the current only works at speeds where the current regulation in the driver works, and its fading away already below 500 rpm. To really use it at insane speeds would take a driver rated at 300+ volts. But I have an investment in the 2M542's by the 8 pack, so they will have to do. Leadshine has others, but I think they quit at 80 volts & under 10 amps. And their site is broken tonight, main page is ok, but clicking on anything stepper gets a page not found. Looks like Wantai has an 80 volter at 5.6 amps CCS for about a $70 bill. On fleabay of course. No experience with it. For me, the 2m542 has been bulletproof. The limits I found yesterday are more related to the speed of the opto's in it than anything else, they simply aren't up to it when the PRR gets above 350 kilohertz. And thats 2x faster than the specs... > I have one of these - they are the biggest > motor the 3.0A and under drivers can push but the 6.8mH is a real > downside on performance. Running serial drives that number into the > insane range at about 27mH, so parallel is definitely the way to go > when you have a driver that can run at 2.8A without overheating. 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
