Re: Ballscrews/linear drive

Part of the problem is that this needs to be taken apart easily for
transport. So I was thinking I'd have it so the doors retract into the
right and left "pocket" (ie, fully open) and come apart from the upper
and lower track. Then I just have two thick panels about 7 to 7.5 ft
by 3 ft and a couple pieces of track.

Again, if they have to pull a rope you are asking too much. This may
be used in the future with members of the public to whom -all- of this
will seem strange and confusing.

Emergency stop? This is for a Klingon ship bridge, if you are too slow
you don't -deserve- to survive!

Steve Greenfield

Alan Marconett wrote:

> 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