On Thu, Dec 10, 2009 at 01:10:50PM -0500, Gene Heskett wrote:
>
> Heck, I knew I wasn't inventing anything that wasn't just common sense, but
> my way leaves room in the middle for the nuts that attach it to the screws in
> the mill, and my center disk has the fins rather than slots. All carved from
> some very hard steel mine shafting from the scrap yard. I didn't count on
> its hardness though, they were hell on carbide to carve out. OTOH, I both
> didn't look at wikipedia, but wouldn't have known what to look for either.
> Such is life. :)
Ah, if the sense was _that_ common, the rest of us wouldn't need to know
the name of the thing so we can look up how to make it. ;-)
> >One idea I'm considering is driving via a toothed belt, from a motor
> >clamped nearby, in the T-slots. Just looping the belt over a pulley
> >added behind the rotary table handwheel allows it to still be used
> >manually, when it isn't worth mucking with gcode.
>
> Belt tightness I found is very important as I'm belt driving my Z and found I
> had to wedge a good sized bar in there when tightening the motor mounts
> slider to get the backlash down. With visible belt slop as it reverses, the
> backlash went from 3 thou to 50 thou!
Oh-Oh, I'll have to remember that. I hope the 50 thou was before the
persuader was used to rack up the belt tension.
Erik
--
It is not worth an intelligent man's time to be in the majority.
By definition, there are already enough people to do that.
-J.H. Hardy
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