Co-axial Crank-slider coming soon

Thu, 11 Apr 2013

I'm almost done with this co-axial crank-slider, just the assembly photographs to process.  A crank slider mechanism uses a crank, the rotating bit at the bottom, and a slider tube hinged onto the top of the box to convert rotary motion into an up and down, back and forth motion.
The co-axial part means that two sliders share the same axis to make a more interesting motion.  

In this project there are three tubes nested one inside the other. The longest tube, 6mm on a side, is fixed to the right crank, the middle tube, 7mm, is fixed to the left hand crank and moves 90° ahead of  the innermost tube.. The final tube is 8mm on a side and is hinged onto the top of the box.

This is a promising looking mechanism which I'm hoping will be useful for all sorts of paper projects. The 90° lag in the motion makes for an interesting, organic looking movement.

Comments (3)

  • cool022883 April 11, 2013 at 7:30 pm

    the movement looks very

    the movement looks very interesting cant wait to see what character you choose to attach to it

    i see like 2 animals chasing each other maybe a dog and a cat?

  • michael42er April 11, 2013 at 9:33 pm

    An interesting variation is a

    An interesting variation is a horizontally oriented crank-box and two points with figures collide.

    • umehta April 11, 2013 at 9:38 pm

      It seems Michael has already

      It seems Michael has already figured out a variation! Wow – it's gonna be very interesting to see what these genius minds come up with. 

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