Customizable Flexible Coupling

Highly edited version of the original from Gyrobot and the version from MarcoAlici with independent shaft sizes.(see Remixed from).

Now contains many comments and named parameters.

Features:

• Top and bottom independent hole diameters
• Smooth exterior spirals for coupling
• Hex or square captive nuts
• Recessed bolt heads
• Optimisations for no support printing
• D shafts optional

Notes:

• 100% fill for structural strength
• PLA is less brittle than ABS for this structure.
• Print with no support (unless spiral degrees are very high).
• The longer and thinner the spirals are - the more flexible the coupler will be.
  • So increase Spiral degrees for longer arms and Number of Spirals for thinner arms.
• Top and Bottom captive bolts are the same so there is no wobbling at high spin rates.