spinning gears for test print

thingiverse

you can play with it and check the Slicer settings. you can check Stringing,Retraction,Solidness and so on. Note: you may face the issue which called 'elephant foot'. usually 1st layer expands a bit,and hole of gear is going nallow a bit. that's why gears are not spinning smoothly. so solution is that put each gear into pillar with up-side-down.push deeply,turn it hard,put it out,then insert it with normal direction.that makes it smooth.