Re: re:Ballscrews/linear drive

With the danger that someone else will bid on this; I found an auction
on eBay for actuators with DC servo motors. He says they are new
removed from unused equipment, but doesn't seem to know anything else
about them.

http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=540652280

Opinions? He says he has 4 and there are no bids yet. Is $300 each a
good price for this?

Of course, I really need these things to take one second to move 12 to
18 inches. Pretty fast, I know. I think I figured I'd need a 3 or 5
tpi ballscrew for the average motor.

Steve

--- In CAD_CAM_EDM_DRO@egroups.com, ballendo@y... wrote:
> Steve,
>
> self contained units for this purpose are called "actuators", and
-snip-
> Ballendo
>
> P.S. Remember, you probably don't need a servo drive. just a motor
> and some limits. Also, I don't know where to look, but these must
> also be available as surplus when stores with automatic doors are
> closed/upgraded....
>
>
'********************************************************************
> 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<snip>