Re: [Emc-users] Cincinnati Toolmaster

[Kirk W. <kwa...@wa...>]

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/ ).

-- 
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.wallacecompany.com/E45/index.html
California, USA