Mantis Rover Mecanum Robot Platform

This is the second part of the build of the moving base for my robot arm project. The Rover is now fully operational.

I added a hackaday.io project:

https://hackaday.io/project/166048-mantis-rover

You can download the cad files from:

https://github.com/4ndreas/MantisRover

or the stl at thingiverse:

The PCB files for the motor drivers are available at:

https://github.com/4ndreas/TMC5160_Hardware

I post regular updates on my Instagram feed:

https://www.instagram.com/4ndreash

Part	Quantity	Links (some are affiliate links!)
The Motors I used 24V 440 RPM	4	AliExpress.com Product - Chihai Motor CHP-36GP-555-ABHLL DC Magnetic Holzer Encoder Planetary Deceleration Gear Motor 12.0V 24.0v
The BMS of my Battery Packs	1	AliExpress.com Product - 8S 24V (29.2V) Lifepo4 battery BMS with 25A constant working current for e-bike Lifepo4 battery and others
The Microcontroller STM32F4 Black VET6	1	AliExpress.com Product - STM32F407VET6 development board M4 STM32F4 core board arm development board cortex-M4 instead of STM32F407ZET6
Remote Taranis Q X7	1	AliExpress.com Product - Original RunCam TX25 Micro Swift All in 1 Mini Vedio Transmitter 5.8G 48CH 25mw for FPV RC Drone Quadcopter
3.2V 6Ah LiFePo4 Cell	8	https://www.aliexpress.com/item/3-2v-6Ah-high-discharge-35C-lifepo4-battery-3-2v-6000mah-for-2s-3s-4s-5s/32773428864.html

Mantis Robot Arm - Part 1 - The Gripper

This is the first video about my new robot arm called Mantis. Just because of the looks of the eye like encoder:

I plan to do several videos about the assembly. The parts will be listed below. I try to supply you with a link. Besides I'm quite busy now so don't expect soon to many.

BOM:

Part	Quantity	Links (some are affiliate links!)
Printed parts	1	http://www.thingiverse.com/thing:1480408
Vitaflex 30	10g	http://www.smooth-on.com/Urethane-Rubber-an/c6_1117_1142/index.html
Servo MG 996R	1	AliExpress.com Product - MG996R	search ebay
Bearing DIN625-624 4x13x5mm	4	search ebay
MR83 3x8x3mm	1	search ebay
M4x40	1
M4 Nut	1
DIN 125 - 4	3

3D printable Robot Arm

This is the first post about my new 3D printable robot arm. It is inspired by well known industrial robots but 3D printed. The overall goal is to build a nearly entirely printable and cheap robot arm with at least 5 degrees of freedom.

I'm currently done with the base section and the forearm. I plan to document this project as a video log on Youtube. 

The first video is about the base section, the second about the forearm:

Rotary plate and conclusion:

I hope you excuse the video and audio quality as I'm still learning this video stuff. 

Of course you can download the stl files from thingiverse:

http://www.thingiverse.com/thing:591230

http://www.thingiverse.com/thing:601036

http://www.thingiverse.com/thing:623481

The parts are completely printed in ABS. This took about a week. I used 12% 3d honeycomb infill and slic3r 1.21e. It's about 1.2kg filament. 

I don't recommend printing them yet as I need different kind of motors. Steppers are not the best solution for a robot. They provide accurate movement but the torque-to-weight ratio is very bad. I will post updates with future developments. 

Next up is the gripper:

Arm moving with DC-Motors:

I started a hackaday.io project:

http://hackaday.io/project/3800-3d-printable-robot-arm