Fun fidget! I scaled Z up to 180% for added strength. Nice mechanism and excellent model!
Mechanical Iris mechanism with 5 blades
Decorative and working iris mechanism based on 5 blades.
In the contest Mechanical Marvels
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updated
October 25, 2022
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@mobiobi Thanks for sharing your print!
New print, this time with 200% scale on Z. Additionally, I scaled the X and Y axes on the spur gear to 99.3% for a slightly tighter mesh on the gears. This one works really well with no slipping of the gear teeth.
@Uenbzsto Forgot to mention, I also used ironing for the top surfaces of the spur gear and blades. That makes them very smooth on both sides for low friction. (edited)
With the extra Z scale it's nice and chunky. Printed in Polymaker Matte mint green PLA and Hatchbox wood fill PLA.
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Fun print. I've had some issues with flexibility of the upper and lower rings causing teeth to slip and too much drag on the sliding surfaces, so I am re-printing with Z scaled 200% and using ironing to see if that helps.
@Uenbzsto Hi nice print, I had the issue with slipping only with the teeth without the extra leg. In your print you used the riggid ones so I don't know why they still slip. Are they rotating freely?
@Dynamite Yeah the pivots are rotating freely. I think the PLA I used is just rather flexible and it allows the front and back rings to flex out of plane.
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@kevinbish15 WOW nice print, I like the colors!