150F is on the hight side but not above the limit. Keep it under 200F or 100C
Why not reduce the current limit until it stops working then turn it backup. Run it just above the lowest current setting that still works. This will cost nothing. If it ever fails you might want to replace it with something else, A couple options.. 1) What you may need to do is find a motor that is a better match to the load. Then it can run without having to work very hard and run cooler. 2) The other option, more expensive is the now closed loop steer motors. These use an encoder in the stepper motor that connects to the driver, so you'd need to replace both bt it uses only enough current to make motor step. They run much cooler On Sun, Nov 26, 2017 at 2:35 PM, Gene Heskett <[email protected]> wrote: > Greetings all; > > I have the psu and a 2m542 driver about half wrapped so I can power it > and run it with a function generator. To get it to drive that table > which has considerable drag to help hide the backlash, so in order to > get a decent turn rate, in the 30 degrees/second rate, I've given it 3.7 > amps, probably a bit much for what I think is a 250 oz/in nema 23 motor. > > Them temp rise is about 80F, or about to 150F in a 70 degree environment > after running steadily for an hour. > > If I enable the half power when stopped function, I can't see as that too > hot given its running duty cycle. Stopped power is half current, or 1/4 > of the heat generated at full song. > > Does anyone else have an opinion? Unmarked motor, bought with the > original xylotec board and 3 motor kit in the later 90's. > > ============================ > > The different BoB will be here in another 25 or so hours, at which point > I'll hook it up when I change the bob for a much faster one. No opto's > on this one. > > 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> > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
