Those controls are 20+ years old and the control design is likely even older than that.
My guess is that you have unipolar motors. I have some motors - Slo Syn's here that have 5 terminals. The one terminal is ground and the other 4 are the 4 phases. If you disconnect the motors - I bet you find that you have 5 wires leading to each motor. If you can find a common wire between all of the leads you have a unipolar motor. I'd scrap the motors, the boards, and the power supply and start with a new PS, step drivers, and motors and use a LPT port and EMC2 to drive everything. The new Gecko 203V and the 540's 250/251 drives can be driven directly from a LPT port - even a 3.3 volt port. A cheap $10 BOB will work fine. Use an Estop setup to kill the drives if things get out of hand. Even a low cost bipolar setup should run circles around an old unipolar setup. If those were servos, I'd try to save them but those stepper motors can be replaced with decent Nema 34 bipolars for about $70 each or less. You are already going to put a bunch of time into this conversion, why make it more difficult than it needs to be? Dave Kirk Wallace wrote: > On Thu, 2009-12-10 at 22:27 +0000, Andy Pugh wrote: > >> 2009/12/10 Hubert Bahr <[email protected]>: >> >> >>> Does anybody else have an >>> explanation for 4 phases with only 4 wires? >>> >> It might be 2 phase bipolar, but labelled oddly. >> ie imagine that P1-P4 drive a motor wire each, at +40V if the pin is >> high and 0V if the pin is low. >> >> Here's plan: after checking that the drive to that connector is +5 V >> logic level, wire it into the P-port of the EMC machine and plot the >> pattern on Halscope. using EMC as a simple oscilloscope. >> > > The four inputs might control each half of the two h-bridges (four > halves). This may help prevent shoot through. That's what I did here: > http://wallacecompany.com/E45/Rotor%20Cam/rotor_driver-2b.png > http://wallacecompany.com/E45/rotor_cam.html > > > ------------------------------------------------------------------------------ Return on Information: Google Enterprise Search pays you back Get the facts. http://p.sf.net/sfu/google-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
