Cycloidal drive | adafruit | Page 1

pulsar light Mar 14, 2026, 4:58 PM

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I’m not sure what units you’re in, but typically you need 0.2mm of clearance on 3D printed parts

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I appreciate that the gears are precise with water-jet, but the precision of your housing is lower

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How accurately can you measure?

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Does it match the model?

lyric meadow Mar 14, 2026, 7:02 PM

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it does mach the aluminium part i made afther i tested the 3d printer part was same size

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but once the steel rods were delivered i noticed them getting pushed away. So that meant huge amount of friction

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i couldnt get the gearbox to move once i put the cover since then the rods couldnt get pushed outside

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This vid is shows i could have expected it

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but if i make the cycloidal gear scale a little bit smaller than the perfect size. You say if i make diameter from 90 to 89,8? mm

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Idkhow fast the backlash builds up

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i can make vid of the pins getting pushed

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It just barely turns

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pulsar light Mar 14, 2026, 7:36 PM

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I imagine you could sand it down until it fits. I’ll ask some ME coworkers on Monday

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Are you trying to increase speed or increase torque?

lyric meadow Mar 15, 2026, 2:14 AM

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Well mostly to make it fit in first place

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But for backlash you want the sanding to be evenly spread

lyric meadow Mar 15, 2026, 9:02 AM

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Making some test prints rn for the diff tolerances

pulsar light Mar 16, 2026, 5:13 AM

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I heard that harmonic drives are better for minimum backlash. Never tried to 3D print one though

lyric meadow Mar 16, 2026, 7:50 AM

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I made a working one atm so turns out the tolerance is 0,25 over diameter

#Cycloidal drive