Build a Square Spiral Scissor Lift for VEX Worlds

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A user is designing a square spiral scissor lift for a VEX robotics competition but faces challenges due to having only two motors for the mechanism. The design must maintain stability while allowing the lift to narrow as it ascends, which complicates the spiral structure. Participants discuss the potential instability of a spiraled lift and suggest exploring hyperboloid structures for inspiration. Clarification is provided that "mother" was a typo for "motor." Visual aids or links to similar designs are encouraged to facilitate better understanding of the concept.
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I am building a robot for the VEX worlds competition and, I was thinking of a spiral scissor lift. But my problem is I only have two mothers to use on this part of the robot. The robot has a square base, so the spiral has to be square. If you could give your theories of how it would work, that would be great.
 
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Welcome to the forum.
A scissor lift becomes narrower in one dimension as it gets higher. To do that in a spiral would require a cylinder that reduces diameter as it increases in height. That is not good for stability. What is a mother?
Is this anything like your concept; http://en.wikipedia.org/wiki/Hyperboloid_structure
It would be good if you could link to a picture similar to what you have in mind.
 
image.jpg

This is the robots base if this helps.
 
i meant motor not mother.
 
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