Toe Tapping Two Way Pendulum – Video
Tue, 15 Nov 2011Despite the early success of the single action pendulum model I thought I'd see just how fast a foot could tap using a double acting pendulum. One where the pendulum lifts the foot both on a left swing and on a right swing.
The box has a pendulum in it with a horizontal arm on either either side.
A large hinged flat piece sits on the top of the box, two push rods rest on the pendulum side arms so that the piece lifts for either direction of swing.
I fitted a hinged shoe to a shallower box. The shoe is fitted with a push rod that drops through a hole in the top of the box.
The two parts ready to be joined together.
Double speed tapping!
Below is a YouTube video of both designs in action. I think I'll stick with the single action, the movement works well and the swings last longer, perhaps because their are fewer moving parts.
I'll have a go at fitting legs and body tomorrow.
Comments (7)
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I would agree that the single
I would agree that the single one looks better for the toe tap but the more rapid springy double one looks like there is just some sort of model there just waiting for the mechanism – its jerky,jumpy and erratic – just can't think at the mo what might be a suitable subject – perhaps something will come to me over night
daveyboy
Hi Rob
Great model all on its
Hi Rob
Great model all on its own, without a body attached. The single action is definitely the better of the two, as the toe tap is too rapid with the double speed. Quite a natural-looking tap with the single.
Thanks for your feedback, I’m
Thanks for your feedback, I'm wondering if I can use the mechanism for a different model. Perhaps a spider, alternate legs driven by each side of the pendulum?
Rob,
The challenge would be
Rob,
The challenge would be how to keep pendulum moving for long enough time without tapping it again…but it looks wonderfully natural with both single and double pendulums…more with single…
Regards,
Urmish
A spider wiggling his legs
A spider wiggling his legs using multiple pendulums is a brilliant idea – I think this would look very effective
How about a seal with
How about a seal with clapping flippers!
If you can also make the
If you can also make the spider move forward at the same time it will really look like a scuttling spider