On 18 November 2010 07:34, Viesturs Lācis <[email protected]> wrote:

> if that is just a base for machine, I suspect that the machine itself
> also will be very massive and very heavy to provide for rigidity and
> vibration damping in order to achieve the high precision in
> hard-to-machine materials. so the question is - what kind of
> bearings/slides are there to be used and what kind of actuators are to
> be used for such a machine? the same old Hiwin rails, but 3 or 4
> instead of one and same old ballscrews with some extreme 10" diameter?

Have you seen this new-build from Dean Smith and Grace? It seems to
use linear tracks:
http://www.deansmithandgrace.co.uk/icms_assets/files/Travelling_Gantry_Machine.pdf

-- 
atp

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