Anti-Backlash 3D Printed Cycloidal BLDC Actuator

24:1 Reduction 3D Printed Dual Cycloidal Gearbox with Backlash mitigation with three split housings coupled with BLDC Motor

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Assembly of a Cycloidal gearbox that hopefully solves the backlash problem with 3D printed
Tightening the string increases the pre-load and stops the backlash.
Open source files at
Based on my previous design at
Inspired in part by

Will use my new FOC Arduino Brushless controller in the future to create a full actuator.

JPEG Image - 44.02 kB - 05/15/2019 at 09:59


Portable Network Graphics (PNG) - 96.56 kB - 05/15/2019 at 09:57


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BortAnovia wrote 07/08/2019 at 14:21 point

what's the maximum weight can this actuator hold?

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KKKEren wrote 06/17/2019 at 11:20 point

I have also studied your previous design. Would not using rolling pins between cycloidal gears and outer shell decrease the friction and hence increase the efficiency, just like your previous design? Did you changed this ensure preload?
Thank you for this very good project!

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Michael G wrote 05/25/2019 at 06:37 point

I'm VERY impressed by how clever this is -- do you have parametric files anywhere for me so I might modify the designs a bit and print them out? Thanks

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Paul Gould wrote 05/21/2019 at 13:42 point

I will do some tests and let you know.

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HyeonwooPark wrote 05/17/2019 at 06:27 point

Paul, I'm looking at your project with interest.
How much less is the backlash compared to the originally designed actuator?

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