On Saturday, December 24, 2011 01:48:17 PM [email protected] did opine: > Probotix equipment > 40VDC 10Amp Linear Power Supply > PBX-RF RF Isolated CNC Breakout Board > 3 - Uni-polar Stepper Motor Chopper Drivers
Specs on this driver board please? > 3 - 280 OzIn 8-Wire Stepper Motor > > I have run this setup for over a year with no problems, so I thought I > would create one I have a used Pacific Scientific Powermax II stepper > model P21NRXA-LNF-NS-00 I could not send the datasheet for the motor so > I sent the link to it > http://www.electromate.com/db_support/downloads/Nema23PowermaxII.pdf This data sheet shows 2 things, one that it does run hot, very hot. 130C in a 40C environment. To me that is too hot, but they know their varnish better than I do. Any other comments I'll wait for the driver specs to make. > I > added a 4th Uni-polar Stepper Motor Chopper Drivers > Wired motor and driver and they actually work > > Issue 1 > The motor gets VERY hot > I have run the other motors for a couple of hours and they got hot but > the SI motor will burn your fingers after about 15 minutes The manual > for the Uni-polar Stepper Motor Chopper Drivers says to set the current > limiter to .145 * target_current, 2.8 amps = .406 I reduced it to .38 > and it still gets too hot > > Issue 2 > The motor is slow > The label says max 1500 rpm but I can only get a fraction of that > I use EMC 2.4.6 > The driver is set to 1/8 stepping > > [AXIS_3] > TYPE = ANGULAR > HOME = 0.0 > MAX_VELOCITY = 360 > MAX_ACCELERATION = 5000.0 > STEPGEN_MAXACCEL = 6250.0 > SCALE = 4.44444444444 > FERROR = 1 > MIN_FERROR = .25 > MIN_LIMIT = -9999.0 > MAX_LIMIT = 9999.0 > HOME_OFFSET = 0.0 > > ------------------------------------------------------------------------ > ------ Write once. Port to many. > Get the SDK and tools to simplify cross-platform app development. Create > new or port existing apps to sell to consumers worldwide. Explore the > Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join > http://p.sf.net/sfu/intel-appdev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> The Ancient Doctrine of Mind Over Matter: I don't mind... and you don't matter. -- As revealed to reporter G. Rivera by Swami Havabanana ------------------------------------------------------------------------------ Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
