Re: [CAD_CAM_EDM_DRO] Ballscrews/linear drive

Ah...but you CAN use an acme screw. If you suspend the door from a split
nut similar to those quick adjustment nuts used on wood vises (and some
machine fixturs), all you'd need to do it tilt the door to move it along the
screw.

Smoke
-----Original Message-----
From: Steve Greenfield <polymorph@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Wednesday, January 17, 2001 11:11 AM
Subject: [CAD_CAM_EDM_DRO] Ballscrews/linear drive

>I know this isn't directly connected with the primary purpose of this
>group, but I don't know where else to ask this:
>
>I have been commissioned to build an automatic sliding door. It is a
>very custom design, that is why the client isn't just buying a standard
>off the shelf door.
>
>I'm figuring using a Ballscrew would fit the requirements, with direct
>drive from a servomotor. I can't use an Acme thread as I want to have
>the option of being able to force the door open if power goes out.
>
>I don't care if the ballscrew and nut are used and aren't accurate or if
>they have lots of backlash. As long as they aren't so worn as to cause
>problems like sticking.
>
>I need two of them, this will be a two piece door. Does anyone here have
>used ballscrews/nuts fitting this description, or know where I might
>look for this? Trying to save a bit of cash without compromising the
>integrity, obviously this isn't a need for high accuracy.
>
>The other option I'm considering is something I found in the Small Parts
>Inc. catalog. I can't locate my catalog to get the name of it, but it
>sort of "climbs" a smooth rod as though it were a ballscrew. Anyone know
>what I'm talking about?
>
>Any help is appreciated. Especially names of suppliers in the
>Tacoma/Seattle area, places that don't have a "3 question limit". :')
>
>Thanks,
>Steve Greenfield
>
>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

discussion of shop built systems, for CAD, CAM, EDM, and DRO.

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