On Sat, 2009-11-14 at 09:38 -0800, Kirk Wallace wrote: > On Sat, 2009-11-14 at 16:37 +0000, Ian W. Wright wrote: > > Hi, I'm wanting to change the spindle motor on my little > > mill to one which I can speed control and which has a bit ... snip > > maybe suggest a suitable circuit? Thanks > > > > Ian > > Off the top of my head, If I had a little mill with a small budget, I > would consider shopping for a KBIC controller, > http://www.wallacecompany.com/machine_shop/kbic/ > http://cgi.ebay.com/KB-ELECTRONICS-KBIC-120-DC-MOTOR-CONTROL-REMANNED_W0QQitemZ250527988998QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a54a1bd06 > > (Short URL) http://preview.alturl.com/sfrw > > scrounge a free 110 VAC universal motor and use a PWM signal from EMC2 ... snip
Another thing that comes to mind, these universal motors tend to be very noisy. I have one of these three phase washer motors: http://www.wallacecompany.com/machine_shop/wash_motor/ which spins up to 16 kRPM, is quiet, and works well with my VFD's (but I'm lusting for a Danfoss). It's cheap, but out of the dirt cheap range though. I wish I could find the time to mount it to a small mill spindle. I need a mill to do PCB milling, someday. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
