My setup is compleatly DIY. I just used a lm317 in current reg mode set to the desired current for the drive. I have a plan to incorporate a mosfet and resistor that is turned on by a one shot 555 timer feed from the step pulse to raise the current on motion. the cct i used if from oatleyelectronics.com and works well (500mm/min on old steppers from printers. I could run faster, but its in full step and like i said home brew so probably couldn't take it. Jason Cox
On Sun, 2007-08-19 at 09:06 -0500, Jeff Epler wrote: > I glanced through that PDF and the numbers, formulas, and circuits look > pretty typical for unregulated linear power supplies. > > Unregulated linear power supplies are considered the best kind for > running steppers with "chopper" or current limiting stepper drivers. > The power supply is simple, though the capacitors and transformers can > be expensive. > > If you are not using gecko drives, the only calculation that is likely > to vary is the desirable voltage: different driver circuits will have > different minimum and maximum voltages. > > Jeff > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
