Probotix equipment 40VDC 10Amp Linear Power Supply PBX-RF RF Isolated CNC Breakout Board 3 - Uni-polar Stepper Motor Chopper Drivers 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 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
