Re: [Emc-users] Cincinnati Toolmaster

[dave <den...@ch...>]

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