Re: [CAD_CAM_EDM_DRO] Re: driving a Router - Belt or Ballscrews

In a message dated 13-Jun-02 19:26:51 Central Daylight Time,
davemucha@... writes:

> or do you use a lead
> screw on each side and drive them from the same stepper ?

I built a HUGE X-Y router-table for a firm in England with ball-screws along
BOTH sides of the table, for the "X axis", and connected these to ONE large
stepper via Nr. 35 sprocket-chain. WHAT a lot of expense and hassle! BUT,
it worked and was "rigid", and all that. I have had NO "feedback" from the
purchasing/using firm since '86 when I installed that contraption over there,
but I DID see it again in '96, and they had REMOVED one lead-screw, and moved
the one stepper (Was a Size 172!) to turn the single remaining X-screw (the
Y screw was on a carriage supported at BOTH ends, with one Size-42 stepper).
I asked if they didn't experience too much flexing of the "far end" of the
carriage, and they said it was built SO rigidly this was not a problem for
the woodworking application. So, I went away relieved, never knowing if the
worker I asked had a clue I had built the thing a decade before! Jan
Rowland


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