Re: [CAD_CAM_EDM_DRO] ballscrew question,

Hi,

Don't know about a rule of thumb but I know that my 16mm (~5/8") screw for
my Z-axis whipped WAY to much for my liking without a support a the lower
end.. It's about 500mm (~19") long. You may get away your 6 inches depending
on the diameter of the screw and the speed you turn it. If it's not too much
problem, put that bearing in there. That's my opinion.
Good luck!
/Henrik Olsson.

----- Original Message -----
From: "mark_anthony123" <mark_anthony123@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, February 09, 2005 5:14 AM
Subject: [CAD_CAM_EDM_DRO] ballscrew question,
>
> hi, do ballscrews have to be supported at both ends? Is there a
> certain length or rule of thumb? I was thinking of the z-axis for a
> homemade cnc router and the whole travel is only about 6 inches.
> what about a 20" travel, the most the screw would be hanging out at
> the end is 10". support it? I was looking at a mill/drill plan and
> I did not see pillow blocks on the free end. Thanks Mark.