Harbe Works · Cycloid Drive 25:1 · v1.0.0
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A 3D-printable 25:1 cycloidal gearbox for a NEMA17 stepper.
Start with docs/HW-Cycloid25_Assembly_Guide.pdf.

Folders
  stl/        print-ready parts, already in print orientation (print Disc twice)
  fit-test/   18-piece fit test: PRINT THIS FIRST (guide, page 4)
  step/       STEP files of each part and of the assembly, for remixing your own mounts
  docs/       assembly guide (PDF) and bill of materials (BOM.csv, with links)
  firmware/   no-library Arduino/ESP32 test sketch for a TMC2209 driver

Key settings: PETG-CF (tested) or PETG/PCTG, X-Y hole compensation OFF, classic walls, no supports.
Measured on our bench: ratio 25:1, ~1.3 arcmin repeatability, ~57 arcmin backlash. Torque not yet measured.

Licence: free for personal, non-commercial use. Please don't sell prints or files and don't re-upload
them: share harbeworks.com/cycloid instead. Provided as-is, no warranty. See LICENSE.txt.

harbeworks.com · Instagram @harryson.stl · help@harbeworks.com
