On Wed, 8 May 2013 13:49:59 +0100 andy pugh <bodge...@gmail.com> wrote:
> On 8 May 2013 13:17, Matt Shaver <m...@mattshaver.com> wrote: > > > > > B. My best advise would be to see if you can adapt a standard > > NEMA 34 (or 42) stepper motor to the mounting scheme on your > > machine. If so, build a new system and eBay the old one. I > > recommend this course of action due to my concern that eventually > > brush wear will kill the existing motors, and you'll be back in > > this same position too soon. > > > I find it hard to support the idea of replacing servos with steppers, > and replacing worn brushes shouldn't be especially difficult. I will agree that the best cheap way to go is to see if the amps and motors can be re-used. That said, if this machine is like the ones I recall seeing, the existing servo motors are much smaller than the typical ones used on a Series 1 Bridgeport. I also agree that if the motors and drives are to be replaced, the 3 phase AC servos you linked to are really nice, but we don't know the budget yet :) > As far as I have heard large steppers are rarely particularly > satisfactory, as they tend to be rather sluggish. You'd be amazed at the the performance you can get out of 86mm and 110mm two and three phase Chinese stepper motors and line voltage powered drives from Leadshine. Thanks, Matt ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
