On Wednesday, February 08, 2012 01:01:09 PM Oscar Chaides did opine: > Hi, some body has the manual for a SLO-SYN 440-TH125 stepper driver from > Superior Electric?, i google it without luck and the people of Dana > Motion said i to old for support > You are asking about the driver & not the motor?
Those things have been around since shortly after dirt was invented, in fact I believe the first one I saw was built with tubes like the 6AS7/6080 stuffs. That is a long time ago. But if its transistorized, I would use as starter values, a 10 u-sec step pulse length, and at least a 10-u-sec dir setup. As for voltages, I'd check to see what output device it used, look up its specs, and run not more than 50% of the devices ratings for motor power supply voltage. That should get it turning I would think. Bear in mind that its possible that this driver is not a chopper stabilized current control model, and could need external current limiting resistors to keep the motors currents down to its nameplate ratings. These will be big, likely 100 or 200 watt rated resistors and can contribute quite a bit of heat to the shop. There is a possibility that it needs quadrature drive, in which case step/dir would only jiggle it a bit. LinuxCNC makes that choice an easy one to setup/test too. This to me if those drives are that old, is a case where I think I'd take the motors nameplate current as an upper limit, multiply the nameplate voltage by as much as 40 and go shopping on ebay for a suitable driver. I recently bought a 5 pack of MM-542's I am quite happy with for about $275 delivered from China from a dealer on ebay. That is a smaller driver, up to 42 volts and capable of over 3 amps, more than my motors need, and can microstep as high as /64 AND do a 50% current powerdown while sitting motionless so my motors at rest only warm up about 15F. These drives will run a little warmer on less voltage, less than 24 isn't recommended, and I would have gone up to 40 volts at the time I built this last driver box but since a 28 volt medically rated supply 9-12 amp supply with all sorts of control options was available from, and still is, All Electronics for under a $35 bill with shipping, $200+ cheaper than any higher voltage I could find, so that made my decision to use 28 volts for me. This particular supplies 28 volt output can be turned off by a logic signal, and it can supply both 5 volts and enough 12 volts to run fans for its own cooling. I believe the 12 volt follows the 28, but the 5 volts for logic is present full time if its plugged in. I used that 5 volts to run a cnc4pc C1G interface, all in a closed alu box with a 120 volt, 25 watt 5.5" rotron style fan to circulate the air inside the box so the heat is well distributed to the box walls, and with another 5.5" 120 volt box fan that is currently sitting on edge on top of the box, blowing across the top of the box, and which so far in several months hasn't warmed up to the touch enough that I could use it for a hand warmer. The loose fan across the top cools it nicely. The inside of the box stays clean too. :) This family of drivers, MM-XXX IIRC is available for up to 8 amps and 80 some volts IIRC. My motors are noticeably quieter at /16 microstepping than at the /8 that the xylotex boards allowed, but this could well be an artifact of the error between current setting in the driver and each individual motors ideal drive current because as magnetic saturation is approached, the effect of the microsteps will become more and more non-linear making the noise from non-smooth motions more pronounced no matter what microstep value is chosen. I can't hear them until they get close to 40 rpms now. 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> Who needs friends when you can sit alone in your room and drink? ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
