Full Size Turntable Traction Device / Motor, Video

[David Waite]

When you think you have seen everything then something like this comes along or should I say crawls along.
I have attached here a link to a Japanese Video that is very interesting if you zoom to 19:00 minutes and
watch it to the end I think you will be amazed, I wish I could understand what the chap is saying as he might be explaining
about it but I cannot, anyhow I hope the link works.

David.

 

[simond]

Classic monkey-up-a-stick trick.

The cylinder pushes and pulls - the thin rod flips the valve at each end of the stroke. The claw that grips the rail is arranged to jamb one way, and slide the other.

some years ago, I designed the bits that make your car windows go up and down. We had a piezo-motor that had two claws, each opened by energising the piezo crystal, closed by a spring. A third crystal between them moved them apart, and a spring brought them back together. By modulating the signals we could make this thing run up and down its “stick” (a bit of aluminium angle) but it was stupidly complex and expensive and never got developed.

I patented a similar device with only two crystals but we never built one.