The STLs and guide are CC BY-NC, which rules out selling builds or kits and blocks image reuse on commercial sites.
EEZYbotARM MK2 is a small 4-axis arm by daGHIZmo (eezyrobots.it) that copies the parallel-linkage layout of an ABB IRB460 palletizing robot at about 1:7 scale. It is fully 3D-printed and moved by three hobby servos plus a micro servo in the gripper. The MK3 variant swaps the servos for small stepper motors.
At a glance
| Parts cost | $100 (2018) builder · A builder reported about $100 in 2018, including screws, servos and a Pololu Maestro controller source ↗ |
|---|---|
| Difficulty | 2/5 Easy · Printed linkage and hobby servos with no electronics design, though joint fits and servo power need some care. |
| Build time | Not stated |
| Tools needed | 3D printer with 200x200 mm bed (PLA or ABS; some parts need supports), drill bits to ream joint holes, screwdrivers |
| Motors | 3 MG995 or MG946 servos plus 1 SG90 for the gripper |
| Controller | Pololu Mini Maestro 12 (or Arduino/ESP boards per community builds) |
| Sensors | None |
| Published | ✓ Parts list✓ CAD/STL✓ Assembly guide✗ Wiring✗ Software✗ Video Instructables (8 steps) + Thingiverse STLs + Onshape source CAD |
| Activity | Last update 2026-04-14 · Instructables guide with 594 favorites and 180k views; many Thingiverse makes |
| Kits | None known |
Licenses
The design license is non-commercial. Building one for personal, educational or research use is allowed, but selling builds, parts or kits is not.
| Design files | CC BY-NC 4.0 (MK1, MK2 and MK3 on Thingiverse) source ↗ |
|---|---|
| Code | None (the design uses Pololu's Maestro software; third-party libraries such as easyEEZYbotARM are MIT) source ↗ |
| Documentation | CC BY-NC-SA 4.0 (Instructables guide) source ↗ |
Builder notes
Practical points from the project's issue tracker, forum and docs, each linked to its source.
- Servos cannot run from a computer USB port. A separate 5-6 V supply sized for three large servos is needed, and the designer blamed early jitter on weak power and cheap servos. source ↗
- Builders report the non-printed parts list does not fully match the steps, for example the number of M3 screws. source ↗
- MG995/MG946 servos can be hard to find, and the servo gear may need adjusting since horn diameters vary between servo brands. source ↗
- MK3 has no written assembly guide, and one builder found mismatched bearing and bolt sizes between its base parts. source ↗
- Everything is licensed NonCommercial, so selling printed kits or parts is not allowed. source ↗
Other arms plans
- MeArm · $40 · difficulty 1/5
- SO-101 arm · $230 · difficulty 2/5
- GELLO teleoperation arms · $280 (2023) · difficulty 2/5
- Thor arm · $390 · difficulty 4/5
- reBot-DevArm (Seeed Studio) · $1,500 · difficulty 4/5
- OpenArm · $6,500 · difficulty 5/5
- Koch v1.1 arm · $480 (2024) · difficulty 2/5
- ROBOTIS OpenMANIPULATOR-X · $1,600 · difficulty 2/5
- BCN3D Moveo · $430 · difficulty 4/5
- PAROL6 · $970 · difficulty 4/5
- Faze4 robotic arm · $1,000–$1,500 (2020) · difficulty 4/5