On 12-9-2013 20:42, Kerry Lynn wrote: > On 9/11/13 8:14 PM, Gregg Eshelman wrote: >> Bought someone's failed hot wire foam cutter project (it used full >> extension, ball bearing drawer slides) for $20 to get the four NEMA 23, 85 >> oz-in dual shaft motors. >> >> Got the motors off, going to put the drawer slides on the yard sale tomorrow. >> >> Any reccomends on a really inexpensive way to drive these 6 wire motors? > I am *very* happy with my TinyG: > https://www.synthetos.com/what-is-tinyg-and-why/ > > Currently using it to drive a Sherline lathe. I am using 8-wire steppers > (Applied Motion HT23-597D) wired as bi-polar parallel (4-wire). >> I have a bunch of 40/40 T-slot extrusion ($2.49 foot at a surplus company) >> with connectors that fit into the ends *and* inside corner brackets so it'll >> make a very rigid frame. >> >> I am thinking about a 3D printer, but I'll want the thing built very rigid. >> I recently saw a Solidoodle 3 in action. Not much impressed! The build >> platform is only supported on one side and I could see it wiggle, which >> appeared to harmonically combine with the motor motion to produce a visible >> waviness to the edges of every layer. > The next step up from the TinyG is something like the machinekit > that Charles Steinkuehler has built: > http://www.youtube.com/watch?v=AK_OYoNOBDQ > http://bb-lcnc.blogspot.com/p/machinekit_16.html > > This provides you with high power FETs to control heaters, etc. > but is about double the cost (when you factor in the BBB) and needs > two power supplies (assuming you want to drive you motors with > something > 12V).
Kerry, What (single) voltage do you want to use? The BeBoPr will accept a higher voltage. Currently the limiting factor is a 25V ceramic capacitor (C22) on the input of the step-down converter. Note that you'll also use that voltage for the heaters! -- Bas > > -K- >> ------------------------------------------------------------------------------ >> How ServiceNow helps IT people transform IT departments: >> 1. Consolidate legacy IT systems to a single system of record for IT >> 2. Standardize and globalize service processes across IT >> 3. Implement zero-touch automation to replace manual, redundant tasks >> http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > ------------------------------------------------------------------------------ > How ServiceNow helps IT people transform IT departments: > 1. Consolidate legacy IT systems to a single system of record for IT > 2. Standardize and globalize service processes across IT > 3. Implement zero-touch automation to replace manual, redundant tasks > http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ How ServiceNow helps IT people transform IT departments: 1. Consolidate legacy IT systems to a single system of record for IT 2. Standardize and globalize service processes across IT 3. Implement zero-touch automation to replace manual, redundant tasks http://pubads.g.doubleclick.net/gampad/clk?id=51271111&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
