Description Files (6)

Summary

N-DOF:

This project uses connectors that are compatible with Modular Mounting System (MMS) and GoPro to join motorized robotic modules.

N-DOF ANIMATION

Modular: Ideal for flexible use and re-use. Try different arm designs without having to re-print parts. Disassemble and reassemble with ease.
Limitless: Print the same part multiple times and chain them together. N-DOF = "N Degrees Of Freedom".
Extensible: Have a motor or actuator you want to use in your own robot? Design a joint with GoPro mounts separated by 30 mm... Now it is N-DOF compatible!
Compatible: There are a huge number of mounts for various objects that are already compatible with N-DOF. Search for "Modular Mounting System" or "GoPro".

N-DOF MOUNT

The included modules use print-in-place joints to keep part count low. They require supports when printing and a little force to move for the first time.
Included modules use NEMA 17 stepping motors.
The only non-printed parts required are M3 bolts to mount the motors.

If you are thinking of designing a module that is compatible with N-DOF, these features are not a requirement.

N-DOF BASE

Gear ratio = 6:1
Support blockers when slicing may help support removal.
If greater stability is required, print some MMS arms to spread the legs out further.
2 x M3 bolts required to mount NEMA 17.
6 x legs.
1 x motor gear (with 12 teeth).

N-DOF GEAR JOINT

N-DOF SWIVEL JOINT

Regular PLA might not be strong enough for the M5 bolts. I used PolyMax PLA and have had no issues.
If extending the arm to great lengths, be sure to attach the base to a desk with a clamp so it doesn't tip over.
OpenSCAD code can be found at https://github.com/keeeal/n-dof

List coming soon.