What Will This Become? 

Hi MicrobyteAlan, Yes, this mechanism transfers rotary motion to a variable length shaft, and there are indeed many applications, stay tuned! :) Greg

Thank you, and I'm truly pleased to inspire someone! Thanks again! Greg

That could be... :) Greg

Uhhh, ok... :) Greg

@@popzct It pairs well with the previous duck-painting mechanism that you chose to repurpose. I'm connecting the dots, can't get nothing past me.

Rats! :) Greg

Hi JamsterJules, That is very kind of you to say, thank you very much! Yes I do calculate the tolerances for the parts. Depending on the mechanism and the color of PLA I use, I allow .1mm clearances for press fit, and .2mm clearances for slip fit. Thank you very much again! Greg

@popzct thanks Greg

Hi Mskvaer, The axles in this video were 3D printed in Ultimaker Black PLA including the threads. Depending on the color I 3D print them, most often the threads work fine right off the build plate, but I times I use a tap and die to clean them if they're too tight. Greg

:) Greg