RE: Ballscrews/linear drive

Steve and the list,

My garage door opener uses a chain. There is a "release" rope that
disengages the door linkage quickly, if needed. Have you thought about
using a similar drive to move your sliding doors?

Alan KM6VV
PS, I'm sure you won't forget the "emergency" stop sensors!

Steve Greenfield wrote:

>
>
> The ones I've seen don't seem to have this ability. I hesitate to rely
> on the slip of these to allow the doors to be forced open. The client
> had originally suggested some kind of door to open to pull a rope to
> turn the screw, but my instinct tells me that in an emergency
> situation where people just want to get out (smoke and fire, for
> example) -their- instinct is going to be to force the door, not stand
> there looking for instructions and a panel to open. Same goes for
> having some sort of handwheel, even out in the open.
>
> How do they do this on automatic sliding doors? They seem to just slip
> if you force them apart, albeit with great difficulty.
>
> Steve "Newbie" Greenfield