Hello Chich2.
My idea wasn't to use the existing column dovetail as it doesn't extend high enough unfortunately.
1.) I was looking at adding an Z linear slide assembly directly onto the end of the ram (ie, 2 plates with Linear bearings and ballscrew) and then re-attaching the spindle head to it. With this setup you only need around 150mm of travel as the existing knee can still be used in its current config.
Linear Bearing systems are used on a lot of high end VMC's.
2.) There is another idea as well....(full of ideas) using the existing quill but fitting a collar to the spindle. On one side of the head fix a Ballscrew that attaches to the collar and on the other side of the head fix a Linear guide system to the collar. The would provide additional rigidity and control of the spindle and should eliminate any side play whilst providing the Z axis movement. Hope you can understand what I mean...
cheers
Frans
Last edited by Moondog; 12-26-2007 at 03:50 PM.
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