Re: Whoosh, thud - motorised sliding doors

[Martin Howell <martin.howell@xxxxxxxxxxxx>]

Well, its a combinaion of sound and heat insulation I'm after, and I
think with careful attention to seals all round I should be able to
improve the present 'open field' environment, where all the noise and
warmth from the lounge ends up in the landing/office area, and I can't
play loud music in the office without objections from 'er indoors
because she can't hear the telly.

Martin

Chris Hunter wrote:

>Will they make a difference, I wonder ... will they provide sufficient
>acoustic isolation ?   In my experience, sliding doors are rarely good
>at shutting-out any noise ...
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>Chris
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>Martin Howell wrote:
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>>I am planning to build a couple of large sliding doors to close off
>>parts of my currently open plan ground floor (don't ask).  They
will be
>>full ceiling height and around a metre wide, with full height glass
>>panels, so they'll weigh a fair bit - obviously, I need to motorise
>>them :-)
>>
>>Motors and gears etc are not a problem - windscreen wiper motors
fed
>>from a small 12v lead acid battery, kept charged by either the
mains or
>>a small solar panel, letting me still open the doors when there's a
>>power cut, plus some means of disconnecting the drive to open the
doors
>>by hand if the motor gubbins should go titsup. Did this before with
a
>>huge double garage door in my last house as an experiment and its
still
>>in daily use 15 years later.   The problem is control of the
open/close
>>sequence and the need to have safety features included, squashing a
>>small child would probably not go down well.
>>
>>So I need a circuit to control the open/close mechanism.  Ideally,
>>pressing the button (or breaking an infra red beam) makes it open,
then
>>wait a predetermined time (or wait for second beam/sensor to be
tripped)
>>before automatically closing it.  There needs to be a safety
mechanism
>>which detects if someone is being squashed and automatically
reverses
>>the door, or stops it.  It would be neat to have it in touch with
other
>>things - burglar alarm to auto lock the doors when the alarm is
set;
>>smoke detectors to automatically open the doors if the alarm goes
off;
>>and anything else I can think of. Opneing speed is interesting as
well,
>>don't want to press the button and then wait for 30 seconds while
it
>>opens, but if it opens too fast it may be difficult to keep it on
its
>>rails - my guess is that it needs to take no more than around 3
seconds
>>to fully open
>>
>>Has anyone come across anything like this in their travels?  Or is
>>clever enough to knock up a quick circuit diagram?  I can build the
>>electronics, just can't design 'em.  I could make it simple, with
>>buttons for open and close, and a couple of microswitches to limit
the
>>travel, but where's the fun in that?  Any suggestions and/or ideas
will
>>be most welcome, many thanks
>>
>>Martin
>>
>>
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