On Sat, 24 Dec 2011, gene heskett wrote: > 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?
http://www.probotix.com/manuals/ProboStepVX.pdf > >> 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 > ------------------------------------------------------------------------------ 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
