Re: [CAD_CAM_EDM_DRO] Z axis conversion

No!
I just looked at the machine. All you do is replace the acme screw with a
ball screw....a relatively easy task as I noticed from looking at it....and
then you mount the drive motor in place of the manual crank arm...just as
you would do if all you were adding was power feed.

Basklash worries can be eliminated by doing the same thing we manual
operators do. When doing PRECISION work, ALWAYS make your feed adjustments
in the same direction. This may mean the Z axis will have to be backed up
(lowered) past a "start" point and then the recommence (raise the knee)the
feed to the point where you want the bottom of the cutter to be.

Smoke

-----Original Message-----
From: Joe Vicars <jvicars@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Monday, November 27, 2000 2:44 PM
Subject: [CAD_CAM_EDM_DRO] Z axis conversion

> In my opinion, gentlemen (and ladies) the "knee" will not make a
>good "Z". The quill bolt ons I agree aren't great, but you get to
>messing with that knee and you'll regret it. There is a bevel reduction
>gear in there (that's about 2:1) so there is some backlash. Even though
>I think Smoke is right about not needing a anti-backlash nut. So, you
>have to get all that out of there and fit a motor up inside the knee
>somehow? I don't think so.
> Not to mention you have to move 3 big castings, the knee, the table,
>and the saddle. All together 500 pounds at least! Crank on that knee
>up and down several times a day, it's a good workout. You're going to
>put an awful load on any reasonable sized motor.
> The Knee Way? No way!!!!
>
>
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