On Saturday, July 30, 2011 06:41:18 PM R. van Twisk did opine: > Gene, > > I don't have experience with the G540, I am using the Vampire series > which are a great set of drivers but they are not faultless!! But there > return and support on broken drivers are very good. > > I did hear some good news from the UIM 2400xx series www.uirobot.com > I know a couple of guys using them on there mechmates without issues. > > Ries > That looks like a backwards step, only 2 amps, generally designed for nema 17 motors I assume.
I just found this one, doesn't look too bad. <http://cgi.ebay.com/4-2A-2M542-CNC-Stepper-Motor-Driver-controller-24V-48V-/120755603538?pt=LH_DefaultDomain_0&hash=item1c1d984852> Upto 64 microsteps, current turndown when quiet. I am tempted to order 5 so I have a spare, at 10 bucks more than the G540. 4.2 amps, 48 volt maximum. And I just did, but it will be about 2 weeks free delivery from China. Or, speak of el-cheapo, 70 bucks for what looks like that's about what its worth: <http://cgi.ebay.com/4-Axis-TB6560-CNC-Stepper-Motor-Driver-Controller-Board-/130532324742?pt=LH_DefaultDomain_0&hash=item1e64553586> Nice fan cooled heat sink, but that chip doesn't impress me too much. And its not a step up, 3 amps 36 volts, about the same as the Allegro A3977 but all 4 in one package. The 2M542 is a step up, allowing me to raise the motor voltage if I am so inclined. 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) Rune's Rule: If you don't care where you are, you ain't lost. ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
