Re: [CAD_CAM_EDM_DRO] Z-Axis Knee Woes

Guys,
I was involved in that previous thread, because Femi at
motovidia@... sent me some photos of his design, which showed 2 gas
shocks of 150 lb. capacity, counterbalancing the knee, but the reason was
that his knee had a ballscrew, which had a tendency to let the knee fall, if
it had no counterbalance.

Marv Frankel
Los Angeles

----- Original Message -----
From: "Raymond Heckert" <jnr@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, January 13, 2003 7:18 PM
Subject: Re: [CAD_CAM_EDM_DRO] Z-Axis Knee Woes


> First, let me ask a 'd-u-u-h-h' question: Does the knee
> have lock-down gibs, and have you loosened them? Okay,
> then, maybe try a gas spring on either side of the knee.
> There was a recent thread on just that topic recently on
> one of these lists. It might have been Tim Goldstein, right
> here on this list.
>
> RayHex
>
> ----------
> > From: jbordens <jake@...>
> >
> > Hi folks. I'm retrofitting a G3102 Grizzly Knee Mill, a
> smaller type
> <snip>
> > Here are my problems:
> >
> > (1) the motors aren't powerful enough, apparently, to
> raise the knee.
> > They stall and eventually cause my geckos to fault. I'm
> pretty sure
> > I have the "limit" set to Max on the geckos.
> >
> > (2) when lowering the knee, the motor turns and every now
> again
> > there's a 'thump' from the mill, as if the knee is not
> lowering
> > smoothly, but in little increments.
>
>
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