Anyone able to point me in the right direction on this one ? :-/

[Donegal Paul]

Hi all,

completley new here and not even sure im in the right newsgroup for this
query (trying alt.engineering.electrical too) Anyway, here goes.

I am looking to build a small wooden platform with a motor / servo which
when operated will rise about 2 feet and then stop. when operated again, it
needs to drop again slowly. It needs to be able to take about 20kgs in
weight and i will probably use a sound activated switch for it.

The question is, has anyone any hints on where i can get or what sort of
servo or motor i will require??

Thanks in Advance

Paul.

 

[[email protected]]

Hi all,

completley new here and not even sure im in the right newsgroup for this
query (trying alt.engineering.electrical too) Anyway, here goes.

I am looking to build a small wooden platform with a motor / servo which
when operated will rise about 2 feet and then stop. when operated again, it
needs to drop again slowly. It needs to be able to take about 20kgs in
weight and i will probably use a sound activated switch for it.

The question is, has anyone any hints on where i can get or what sort of
servo or motor i will require??

Thanks in Advance

Paul.

The real issue here is mechanical, not electrical.

You don't need a servo motor. Your first problem is to
decide how you want to convert rotary motion (the motor
spinning) to linear (the platform moving up or down).
Your next is to ensure that the platform will not bind in
either direction.

Easiest might be to modify a garage door opener. It produces
linear motion, has up and down limit switches (to automatically
stop at the top and bottom) and electronics to automatically
reverse direction on subsequent operations - and it can handle
the weight. You may have to move the limit switches out of the
door opener motor assembly and mount them on the frame that the
platform "rides" in. You'll need solve the mechanical problem
of the platform moving without binds, and figure out how to
connect the door opener traveler to the platform and still
get the overall "look" you are after.

 

[John Duffus]

Hi all,

completley new here and not even sure im in the right newsgroup for this
query (trying alt.engineering.electrical too) Anyway, here goes.

I am looking to build a small wooden platform with a motor / servo which
when operated will rise about 2 feet and then stop. when operated again, it
needs to drop again slowly. It needs to be able to take about 20kgs in
weight and i will probably use a sound activated switch for it.

The question is, has anyone any hints on where i can get or what sort of
servo or motor i will require??

Thanks in Advance

Paul.

My first inclination would be to look at a hydraulic jack and motor-driven
pump. I think the bits should be available at retail hardware fairly easily.
Regards,
John

 

[Donegal Paul]

My first inclination would be to look at a hydraulic jack and motor-driven
pump. I think the bits should be available at retail hardware fairly easily.
Regards,
John

Thanks all
Paul