3D Printed, Classroom-Ready Robotic Arm

Robotic Arm (3D Printed + Simple Coding)

Project Overview
I am a high school teacher looking for a proven, classroom-ready robotic arm project suitable for students (Years 8–11).

In the past, we have used robotic arm designs found online, but many have failed to work reliably, resulting in wasted time and disappointment for students. I do not have time for experimentation or trial-and-error.

I am looking for a fully documented robotic arm design that is already known to work, with clear evidence that it functions correctly.

What I Am Looking For (Very Important)

I am NOT looking for:

Concept designs

Untested prototypes

“It should work” ideas

Incomplete documentation

I AM looking for:

A robotic arm you have already built

A robotic arm that you can prove works

A robotic arm suitable for classroom use

Mandatory Requirements (Read Carefully)

To be considered, you must provide ALL of the following:

1. Proof That It Works

A video of the robotic arm you personally built, fully assembled and operating

The video must show:

Power on

Joint movement

End effector (gripper or tool) operation

Stock videos, YouTube links to other people’s projects, or simulations are not acceptable

2. Complete Project Documentation

You must supply everything required to reproduce the project, including:

STL files for all 3D printed parts

Full parts list (BOM) with:

Electronics

Fasteners

Motors / servos

Microcontroller

Wiring diagrams (clear and student-friendly)

Fully working code (Arduino / Micro:bit / ESP32 preferred)

Assembly instructions suitable for students

3. Classroom-Suitable Design

The design must:

Be robust and reliable (not fragile or temperamental)

Use reasonably priced components

Avoid complex calibration or tuning

Be achievable with school-level tools and timeframes

Support simple coding, not advanced robotics maths

4. Cost Transparency

You must clearly state:

Cost per robotic arm (AUD preferred)

Breakdown of major components

Any optional upgrades vs base build

5. Guarantee of Functionality

You must be confident that:

If the design is built exactly as specified, it will work

No undocumented “tweaks” are required

No hidden dependencies or missing steps exist

Preferred (But Not Mandatory)

Arduino-based control

Servo-driven joints

Gripper end effector

USB power or simple DC supply

Beginner-friendly code with comments

Designed for 3D printers commonly found in schools (PLA, no exotic materials)

What I Will Pay For

I am happy to pay for:

A proven, working design

Time spent preparing clear documentation

Minor modifications to make it more classroom-friendly

I am not paying to experiment or discover problems during the school term.

How to Apply

Your proposal must include:

A brief description of the robotic arm you personally built

A link to a video showing it operating

The microcontroller and motors used

Approximate cost per unit

Confirmation that all files and documentation will be provided

Applications without proof of a working build will not be considered.

End Goal

I want a robotic arm project that:

Works every time

Can be confidently rolled out to a class

Gives students a positive, successful experience

Focuses on learning and coding, not troubleshooting failures

If you have already built this and can prove it — I want to hear from you.


Attached are images of my failed one