Re: Slightly OT: automated garden gazebo inspiration

["Paul Gordon paul_gordon@xxxxxxxxxxx [ukha_d]" <ukha_d@xxxxxxxxxxxxxxx>]

Thanks Li, I'll take a look at the link...

Paul G

Sent from my iPad

> On 10 Jan 2016, at 22:07, K C Li li@xxxxxxx [ukha_d]
<ukha_d@xxxxxxx> wrote:
>
> Hello, Paul.
>
> Have a look at this similar requirement and possible solution..
>
> http://www.instructables.com/answers/How-do-I-make-a-pulley-system-to-lift-a-model-trai/
>
> As to the lower limit stop, you could have a picture frame type
> arrangement that would fit around your pool table outer edges but
secure
> it under the platform you are lowering - with one side hinged and the
> other to a micro switch. When the unhinged side touched the table
first,
> the micro-switch is activated and power to the motor is stopped.
>
> Alternatively, use an ultrasonic distance measurement module driven by
a
> micro that could be accurate to 1cm.
>
> http://www.instructables.com/id/Distance-measurement-and-obstacle-detection-using--1/
>
> Regards,
>
> Kwong Li
> li@xxxxxxx
> Laser Business Systems Ltd.
> http://www.laser.com
>
>> On Sun, 10 Jan 2016, Paul Gordon paul_gordon@xxxxxxx [ukha_d]
wrote:
>>
>>
>>
>> Hi all, bear with me, there IS an automation link in here, of
sorts... :-)
>>
>> My spring/summer project this year will be to construct a timber
framed garden gazebo,
>> approximately 4m x 6m (ish), open sides (2 sides are sheltered, 2
sides will have
>> standard issue outdoor curtains. The plan is for this to house my
pool table outside for
>> use during the summer months... There really isn't a big enough
space anywhere inside the
>> house... In addition I have a half-plan to also house an
electrically raised & lowered
>> platform, probably the full size of the internal dimension, upon
which I can leave my
>> slot car track permanently set up for use... It's this last bit
I'm seeking inspiration
>> for...
>> I already have a suitable motor.. A Powercord curtain motor, which
has automatic limit
>> stop, and is most certainly powerful enough to raise the weight..
>> I plan for the motor to be housed way up in the apex of the roof
ridge, and via a system
>> of ropes & pulleys be able to raise & lower the
platform...
>> When raised, the platform will become a false ceiling within the
gazebo, it will lower to
>> the point it sits atop the pool table which will then become the
base for the platform.
>>
>> The motor has a single pulley wheel connected to the shaft, around
which the pull cord
>> from a curtain track is meant to sit... I will need to use a cord
larger (stronger) than
>> a normal thin curtain pull type I suspect...
>>
>> For stability, I think I should be looking at a cord attached to
each of the 4 corners of
>> the platform, rather than a single cord, and I don't really want
the cords to be "in the
>> way" when the platform is lowered, so I think I want to take
a cord from each corner of
>> the platform, and take it straight up the inside surface of each
of the 4 main support
>> legs, around a pulley mounted at the top of each leg... So far so
good... I now have 4
>> cords I can pull on evenly to raise & lower the platform. I
also have a half idea that
>> perhaps each corner of the platform could be fitted with a small
wheel which runs inside
>> a guide channel secured to (or routed into) the inside of the
gazebo legs, thus further
>> restricting it's possible movement to straight up & down
only...
>>
>> Where I'm struggling to conceptualise the mechanics, is how to get
those 4 cords from
>> each corner to a single motor shaft, such that the motor will
spool each one evenly...
>> Anyone have any ideas or links to designs I can look at for
inspiration?
>>
>> My other as yet unresolved question is how to effect the limit
stop on the lowering
>> cycle... Raising limit stop is easy.... But how the get the motor
to stop once the
>> platform is resting on the pool table?
>>
>> Anyone fancy a holiday in Oslo in the summer to help with
construction!?! :-)
>>
>> Sent from my iPad
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
> Posted by: K C Li <li@xxxxxxx>
> ------------------------------------
>
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>


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Posted by: Paul Gordon <paul_gordon@xxxxxxx>
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