On 3/30/2015 3:50 AM, andy pugh wrote: > On 30 March 2015 at 10:31, Gregg Eshelman <[email protected]> wrote: >> Suggestions? > > Ignore the stepper motor voltage rating, it doesn't mean anything. (in > practical terms) > > Set the stepper drivers to the right current for each motor and > everything will be fine. > > You almost certainly want to be ignoring the centre-tap wires on the > steppers, those are provided for unipolar operation. (so you will only > wire 4 out of 6 wires)
So I need a high amp driver for the big motor. Sounds expensive. It's going to be driving an old (1997) Star linear actuator mounted to the side of the bed on a 9x20. Large, heavy aluminum extrusion with a rather fast pitch ballscrew inside. Will likely require more than 2:1 reduction. May enhance the rigidity of the lathe if I use enough brackets and bolts. ;) Feels like it weighs as much as the bed. I got the two motors, the actuator and a 3/8" diameter ballscrew (to be cut down for the cross slide and fitted similar to an ORAC), mounted running an XY table on a very heavy wooden, rather high table that was custom built for that abandoned project. Only cost $300. The table (with it's near 3" thick top) will be a very sturdy home for my proLIGHT mill. The builder is a woodworker getting into laser engraving. Nice table but he didn't really know what he was going about building the CNC part. Showed me a smaller one he'd built with extrusion and belts. I took it apart yesterday and discovered exactly how sharp a cut edge on stainless steel expanded metal* can be. Got a pair of nice gashes on the underside of the middle two fingers of my left hand. Bled a bunch, got wrapped up good. Really doesn't hurt much. That was atop the table, spaced up from the base about an inch. Had to remove it to get at the bolts holding it to the actuator's slide block. The sharp edges were covered by wood corner molding. A little slip handing it off and... I'm going to have to take a grinder to it just to be able to dispose of the the piece safely. Don't think I have a use for a piece of metal like that. --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
