On Mon, 2013-04-29 at 20:28 -0500, Jon Elson wrote: > Steve Stallings wrote: > > > > > > > >> -----Original Message----- > >> From: Jon Elson [mailto:el...@pico-systems.com] > >> Sent: Monday, April 29, 2013 1:00 PM > >> To: Enhanced Machine Controller (EMC) > >> Subject: Re: [Emc-users] converting Monarch 10EE > >> > >> andy pugh wrote: > >> > >>> It has to make more sense to couple a 3-phase motor and > >>> single-phase-input VFD directly to the spindle? > >>> > >>> > >> The motor is an odd frame, and also has MASSIVE torque at low > >> speed. So, the 10EE has no back gear. It probably works MUCH > >> better at low speed than a VFD and typical 3-phase motor. > >> You could make an argument for a DC drive for the motor, but > >> that could be a major project, and not a good one if you aren't an > >> electrical engineer. > >> > >> Jon > >> > > > > The 10EE does utilize a DC motor with impressive low speed > > torque, but it none-the-less does have a backgear. The gear > > assembly is on the end of the motor, not in the headstock. > > > > > OK, I've never worked on one, but have discussed the drive (especially the > thyratron version) with a bunch of people. I must have mis-remembered > what they said. > > Jon
Good grief! I'd thought everyone had forgotten about thyratons. I have a motor that looks amazingly like the Monarch motor. 3hp, 4:1 motor and gear box painted green. Picked it up at Boeing surplus years ago. Nice and quiet, etc. Massive sort of thing. Dave > > ------------------------------------------------------------------------------ > Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET > Get 100% visibility into your production application - at no cost. > Code-level diagnostics for performance bottlenecks with <2% overhead > Download for free and get started troubleshooting in minutes. > http://p.sf.net/sfu/appdyn_d2d_ap1 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
