On Tue, 2010-04-27 at 14:25 -0700, Kirk Wallace wrote: > On Tue, 2010-04-27 at 13:50 -0700, dave wrote: > ... snip > > On the other hand if you have to build a spindle then you can make > > choices. Doing a non-tiltable spindle would be my choice ( a bit > > stiffer). > > I have no head, so I'll need to find a head or make my own. > http://www.henriksplace.se/cnc/new_machine_bt30_spindle.html > http://www.cnccookbook.com/CCMillBeltDrive.html > > > I did implement the W in place of a Z and was not real happy with the > > result. I used a gear-head servo motor of limited power which may be the > > reason for my unhappiness. Moving the mass of X and Y to get Z seems > > like a poor way to do it. I'm implementing a Z on that machine now and > > it looks like < 50 W of servo motor will do it. My W has a glass scale > > on to so I can do repeatable setups. > > > > Good luck. It should be an interesting project. :-) > > > > Dave > > Do you have a ball screw on your knee? I would think with a pneumatic > knee counter balance, a ball screw and big servo, the knee should be a > workable Z. Otherwise the head gets more complicated and adds another > source for slop or flex. Though a head angular axis or two would be nice > (like your Contour? http://www.lathes.co.uk/contourmaster/ ). >
A ball screw, good gearing and an appropriate size servo on the W would do wonders. Dave ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
