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mearm's Introduction

MeArm - Pocket Sized Robot Arm

MeArm Website Where these are available to purchase.

MeArm GitHub Code and resources.

Mime GitHub Code, resources, and the Mirobot.

phenoptix Thingiverse Physical designs and dxf files, alternative hosting, and other designed products.

Repository Contents

This repository contains the cutting files for the MeArm. The MeArm is an Open Source 4DOF robot arm. It is intended to be a low cost and accessible robotics project for STEAM education.

Laser cut (3mm) dxf files and Assembly instruction pdf files are sorted into folders based on versions.

Files are collected from the various sources listed above.

Version History

Available in this repository

  • V3.0 Revised with no elastic bands, still requires a PCB. Build time around 40 minutes.
  • V2.0 Designed for MeArm Pi Kickstarter, incorporates a PCB in the base. Requires elastic bands or nitrile O rings. Build time 30 minutes.
  • V1.0 First finished version. No PCB required. Build time around 2 hours.

All hosted on Thingiverse .

License Information

The hardware is released under Creative Commons Share-alike 3.0.
All other code is open source so please feel free to do anything you want with it; you buy me a beer if you use this and we meet someday (Beerware license). Also this boiler plate is yoinked from Sparkfun with thanks. Images are CC-SA-NC soz, have the files and design but take your own pics ;)

mearm's People

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mearm's Issues

Missing thickness details of acrylic sheets and specs of screws and servos

Hi, thank you for making this open source.

I am kindly requesting to add thickness details of acrylic sheets. Which thickness should I select if I am supposed to laser-cut the design? Also much appreciate if you could include dimensions of the screws and bolts and specs or model numbers of the servos I should use

Sources welcome

May I ask how this DXF was generated ?

I am mostly interested into GLTF output...

Maybe freecad sources would help too

IK Question

I don't have this arm, but I do have a 4-axis arm from Sain Smart which is somewhat similar. My question is, when you move the servo that adjusts the angle between horizontal and bicep (abi), does the angle between the bicep and forearm change, even if you are not moving that servo?
I'm trying to figure out the kinematics for my arm, but it's hard because if I change abi angle, the afo angle also changes just by the way the arm is designed. So if I want the afo angle to remain the same, I actually need to move that servo that controls the afo angle as the abi angle changes. I haven't been able to figure out how to do that yet?

Contributions to the MeArm Project

Hi, I'm ZUHIRO.

I would like to thank you for publishing MeArm on Github.

I was impressed with MeArm and I was thinking about something that I could do, so I am making a new robot arm based on the data of the MeArm project.

I named it "eleArm".

eleArm aims to simplify the assembly by reducing the number of parts compared to the conventional MeArm.

Raspberry Pi pico is used for control.

I am thinking of publishing eleArm on Github as Open Hardware after it is completed.

My goal is to have eleArm ready for workshops for children.

I am a beginner in OSS activities and I have a lot of things I do not know.

If there is any problem with MeArm's activities, please let me know.

Please let me know if there is anything I can do to help the MeArm project.

https://photos.app.goo.gl/3669fKdyqvB4Aqij6

Question regarding the movement of the IK example

Hi guys!

I just built mine own MeArm and I've tried the IK example from this repository, however as the code says that the
arm.gotoPoint(-80,100,140);

should go up and left, but it goes down and to the left - one of the servos are doing the opposite. However, the next step (for going down, forward and right) says:

arm.gotoPoint(70,200,10)

but the y-axis is second parameter, shouldn't it be going up? as in fact is happening and contrary to what's mentioned in the inline comments? Or did I miss something? (Probably the case!)

Thanks for an awesome opensource project!

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