On Thu, 2013-09-05 at 20:19 -0400, Kerry Lynn wrote: > On 9/5/13 7:07 AM, Gregg Eshelman wrote: > > On Thu, 9/5/13, andy pugh <bodge...@gmail.com> wrote: > > > > Subject: Re: [Emc-users] Servo motor watts VS torque? > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > > Date: Thursday, September 5, 2013, 3:19 AM > > > > On 5 September 2013 05:40, Gregg > > Eshelman <g_ala...@yahoo.com> > > wrote: > > > The old motors were 5.8 amp cont, 30 amp peak. Stall > > torque 3NM cont. Max RPM 2400. Max voltage 140 DC > > 140V * 30A = 4200W > > 140V * 5.8A = 800W > > 3Nm * 2400 rpm = 750W > > > > You probably want at least 750W motors, geared to suit any > > difference in nominal motor speed. > > > > My small knee mill seems pretty reasonable with 750W > > brushless servos. > > Though I suspect that I am limited by software commutation > > at that top speed end. > > ----------------------- > > > > The Servo Dynamics SDF1525-12 is rated at 120 volts so I assume the motors > > never saw 140 volts. Still nearly 700 Watts. > Divide watts by 746 to get hp.
Before you jump check to see if those amps weren't connected directly to the line. The set I have of SD board amps just like your's that runs directly off line voltage. It is a little hot but those motor are rather responsive at 167 VDC. ;-) Dave > > Under the heading "you get what you pay for", have you looked at the Teknic > Hudson series? http://www.teknic.com/products/motor_sel.php# > > They are available in a variety of stack lengths and windings, and sold > in the > US by Bearing Engineers: > http://www.bearingengineers.com/products/product.php?id=223 > Bearing Engineers have app specialists who would be happy to talk with you. > > No affiliation, just looking into these for one of my projects. > > ------------------------------------------------------------------------------ > > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > > Discover the easy way to master current and previous Microsoft technologies > > and advance your career. Get an incredible 1,500+ hours of step-by-step > > tutorial videos with LearnDevNow. Subscribe today and save! > > http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > ------------------------------------------------------------------------------ > Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! > Discover the easy way to master current and previous Microsoft technologies > and advance your career. Get an incredible 1,500+ hours of step-by-step > tutorial videos with LearnDevNow. Subscribe today and save! > http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
