AM-ARM200
A fully 3D-printable robotic arm with a 1 kg payload, built for embodied AI research.
Project documentation
Before you build
Five answers, each linked to its source
What does it cost?
$243.33follower arm BOM
The BOM lists the Follower Total as $243.33. bom.md
Can I sell what I build?
YesCommercial use OK
Hardware Apache-2.0 · Software Apache-2.0. Licensing source
What’s open?
4 of 6CAD: AvailableBOM: AvailablePCB: Not documentedCode: Not documentedSim: AvailableGuide: Available
PCB, code not documented. All six files
Is it maintained?
Quiet
Latest activity Jun 18, 2026 · main repo last commit Jun 18, 2026 · 8 commits in the last 52 weeks · 2 contributors Activity
01 / Under the shell
The specifications.
Hardware, build and software on one sheet. Every fact links to where we found it.
AM-ARM200 is a 6+1 DoF robotic arm with a 1 kg payload, built for embodied AI research. The repository provides STL and STP parts for leader and follower arms, plus a bill of materials and hardware assembly guide.
Hardware
- Actuators
- 7 · Motors in the follower robot definition README
- Build
- 3D-printed · PLA/PETG/ABS Documentation
- Degrees of freedom
- 6+1 DoF README
- Payload
- 1 kg README
- Reach
- 52 cm README
Building it
- Printing time
- ~20 hours on a standard FDM printer README
- Printed-part materials
- PLA/PETG/ABS bom.md
- Assembly guide
- The guide covers follower arm assembly. hardware_assembly.md
02 / The files behind the robot
What’s open.
Six parts of the build, each checked separately. Gaps stay visible.
| Part | Status | What’s there | License | Source |
|---|---|---|---|---|
| CAD | Available | STL and STP parts for leader and follower arms. | Not documented | am-arm200/ |
| Bill of materials | Available | Bill of materials for the follower and leader arms. | Not documented | bom.md |
| Electronics | Not documented | Not documented | Not documented | No source found |
| Code | Not documented | Not documented | Not documented | No source found |
| Simulation model | Available | URDF file listed in the repository tree. | Not documented | am-arm200.urdf |
| Assembly guide | Available | Hardware assembly guide for the follower arm. | Not documented | hardware_assembly.md |
03 / Know before you build
Can you sell it?
YesCommercial use OK
The whole repository, design files included, is Apache-2.0. You can build, modify and sell robots based on it, as long as you keep the license and copyright notices.
- Hardware
- Apache-2.0
- Software
- Apache-2.0
04 / The upstream project
Is it maintained?
QuietLatest activity Jun 18, 2026, 134 days before the snapshot
The main repository’s last commit was Jun 18, 2026.
- Stars
- 90
- Forks
- 8
- Contributors
- 2
- Latest release
- None recorded
Snapshot captured Oct 30, 2026. Recorded figures, not live metrics. Active: activity within 90 days of the snapshot. Quiet: within a year. Dormant: longer.
05 / Parts & kits
A head start.
Maker-listed sellers only. No affiliate links or paid placement.
Kit availability is not documented in our reviewed sources.
06 / Side by side
Compare with other arms.
The three arms with the closest documented maker’s cost. Same sources, same rules.
| Robot | Cost | Open files | Can I sell it? | Runs on | Maintained | Stars |
|---|---|---|---|---|---|---|
| AM-ARM200This robotLi Yiteng and Wu Zhiyong | $243.33follower arm BOM | 4 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobot | QuietJun 18, 2026 | 90 |
| PingTi Armnomorewzx | About $261single PingTi arm | 4 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobot | ActiveOct 20, 2026 | 55 |
| SO-101TheRobotStudio × Hugging Face | $121.94per follower arm | 5 of 6 | YesHW Apache-2.0 · SW Apache-2.0 | LeRobotMuJoCo | ActiveOct 6, 2026 | 7,831 |
| ALTO 3D Printed 6 Axis Robotic Arm (WIP)liaochikon | About $400total for the robot | 3 of 6 | YesHW MIT · SW MIT | Python | Not documented | — |
| This robotAM-ARM200 | PingTi Arm | SO-101 |
|---|---|---|
| Cost | ||
| $243.33 | About $261 | $121.94 |
| Can I sell it? | ||
| Yes | Yes | Yes |
| Open files | ||
| 4 of 6 | 4 of 6 | 5 of 6 |
| Runs on | ||
| LeRobot | LeRobot | LeRobot, MuJoCo |
| Maintained | ||
| QuietJun 18, 2026 | ActiveOct 20, 2026 | ActiveOct 6, 2026 |
Upkeep is measured against each robot’s own snapshot. Costs keep the maker’s scope, so check what each figure covers.
See them in the table07 / Follow the evidence
Open books.
Repository files are pinned to commit 5b03af1. Websites and papers are listed with their review dates.
- 01README.md at 5b03af1Reviewed Oct 30, 2026
- 02LICENSE at 5b03af1Reviewed Oct 30, 2026
- 03am-arm200/bom.md at 5b03af1Reviewed Oct 30, 2026
- 04am-arm200/hardware_assembly.md at 5b03af1Reviewed Oct 30, 2026