Simple Nema 17 cycloidal drive full plastic - Free 3D Print Model

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Rediscov

Hobby & DIY>Robotics

IP Report

Print Profile(1)

All

A1 mini

X1E

H2D

X1 Carbon

H2D Pro

P2S

H2S

X2D

H2C

P1S

P1P

A2L

0.12mm layer, 3 walls, 20% infill

Designer

2 h

1 plate

4.8(22)

Open in Bambu Studio

Boost

447

952

1.2 k

703

Released

Description

This model is very simple to assemble. Print all the necessary parts, including the two gears. Then, assemble the model in the following order: wall, gear, shaft, gear, head, top. Make sure the two gears are positioned so that the pins on the head align perfectly with their holes.

There’s only one way to align the two gears: you have to position them by rotating one 180 degrees relative to the other. There should be no force needed to insert the pins, but most importantly, there should be no resistance when rotating the NEMA 17. If you feel any stiffness while turning the shaft, it means the system isn’t properly aligned.

New customizable model: https://makerworld.com/it/models/2714657-customizable-full-plastic-cycloidal-drive

gear

nema 17

cycloidal

Comment & Rating (39)

@digbysmith.stl

Boosted

Print Profile

0.12mm layer, 3 walls, 20% infill

very clean and well thought out design!:)

@user_3913460551

It's awesome! I use PETG to print these parts and it works perfectly. Thanks for your sharing.

@user_3011589305

Print Profile

0.12mm layer, 3 walls, 20% infill

havent assembled yet but looks very good

@skop1

Boosted

Print Profile

0.12mm layer, 3 walls, 20% infill

took a bit of time to figure out the gears have a specific orientation.

@user_976558417

Hello, could someone post a picture with the gear alignment or a mounting guide? I can't put it all together. Thanks a lot in advance!

The designer has replied

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@Rediscov

Hello, the alignment of the holes is not perfect, and this is due to the ratio I chose — 10:1 Even ratios are much harder to align There is only one way to align the two gears: you must position them by rotating one 180 degrees relative to the other. No force should be needed to insert the pins, but most importantly, there should be no resistance when rotating the NEMA 17 If you feel stiffness while turning the shaft, it means the system is not aligned correctly Remember that the gear is not reversible (it does not turn if you turn the output)

Show original

@Holzwurm1

Replying to @Rediscov :

Hello, despite your description, I'm too stupid to assemble it 🤪. Could you please take some photos of the alignment during the assembly of the wheels? I think that would be very helpful. Thanks in advance!

(Edited)

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@LeafCreates

Replying to @Holzwurm1 :

If I print it out I will make sure to post a lengthy instruction manual lol... I understand your pain! I've printed multiple cycloidal gears from different makers and they rarely give enough information to make assembly easy. -Leaf

@le04vin

there is no way you can assemble this please help

The designer has replied

@Rediscov

Hi, as I mentioned in other comments, there’s only one way to align the two gears: you have to position them by rotating one 180 degrees relative to the other.

@le04vin

Replying to @Rediscov :

yes I tried but maybe i am doing something wrong

@Rediscov

Replying to @le04vin :

The only thing to keep in mind is the position of the two discs. Try this: place the ring gear, the first disc, and the shaft. Then, position the second disc and check if there is enough room in each hole to fit the rotor. If not, rotate the disc a few degrees so you can slot it back into the housing. Keep doing this until you see that all the holes have enough clearance to fit all the pins.

@user_2128386227

My NEMA 17 motor doesn't have a long enough wedge or the shaft is longer than other motors! I had to drill a few millimeters of round hole in the center part to be able to push it deeper, otherwise it wasn't enough to clamp everything together!

@user_3471251424

hey, I cant align the gear to insert head both of them. is there anyone to share your alignment picture.

The designer has replied

@Rediscov

Hi, the alignment of the holes isn’t perfect, and that’s because of the ratio I chose — 10:1. Even ratios are much more difficult to align. There’s only one way to align the two gears: you have to position them by rotating one 180 degrees relative to the other. There should be no force needed to insert the pins, but most importantly, there should be no resistance when rotating the NEMA 17. If you feel any stiffness while turning the shaft, it means the system isn’t properly aligned. Remember that the gear is not backdrivable.