View Full Version : Remote controlled pulley???

10-09-2012, 11:44 AM
I want to put a big spider in front of my door that goes down and up.. any suggestion where I can get a remote controlled pulley that will do the task?
I'm thinking of some remote controlled pulley but maybe others have a better idea.

10-09-2012, 12:25 PM
Use a regular pully then attach the other end of the rope to a servo motor near the ground and use that to make the spider go up and down

10-09-2012, 12:35 PM

10-09-2012, 02:07 PM
Depending on the size of the spider, you could use a remote controlled drapery closer or a garage door opener.

Don't know the size of you prop, or budget.


10-09-2012, 03:54 PM
I want to see soem what try this with http://en.wikipedia.org/wiki/Shape-memory_alloy also know as "muscle wire".

You apply voltage and wire expands then remove it and it goes back to original size.(it would be very quite)

10-09-2012, 06:15 PM
What about a sail winch servo? R/C'ers use 'em on sailboats. The link below is for one (just the first one that showed up when I googled 'sail winch servo', not an endorsement of the company or the product) that is $13 and can pull 13Kg.

www.hobbyking.com/hobbyking/store/__18974__Sail_Winch_Servo_13kg_0_7sec_360deg_55g.h tm

The local hobby store will have them

10-09-2012, 06:16 PM
The gear or clock motor (grill) is pretty easy to pull off. You can use leverage to increase the movement. You will have to play a bit with wheel and such, but think of a steam engine wheel. You are going to have a wheel on a gear motor, attach a rod to the outside of the wheel and as the wheel spins it will move the rod up and down and also back and forth. You can limit the back and forth with a guide for the spider line. But you get the idea. You could make this vertical and run the line out the side to hide it better behind a tree, etc. You also don't have to use a wheel, you can just use an arm if you have suitable materials.

10-09-2012, 10:29 PM
I've been looking hard at this company http://www.firgelliauto.com/ to provide linear motors and actuators for some of my high end carpentry projects. You might want to check them out.

12-08-2012, 10:07 PM