Summary

The PrintBot Crab is an educational robot that can walk as an hexapod and can grab objects with its pincers. 

You can see the robot in action at: https://www.youtube.com/watch?v=bb_dW-XyTIc

This modular robot has been designed to attach other components such as servos, LEDs, push buttons, a buzzer, and other sensors included in the product "Mi primer kit de robotica" ("My first robotics kit") distributed by BQ. 

BOM 

Printed parts:

• 1xBattery_holder 
• 1xCangrejo_body 
• 1xCangrejo_central_legs 
• 1xCangrejo_central_servo_support 
• 1xCangrejo_eyes 
• 1xCangrejo_pincers_LEFT 
• 1xCangrejo_pincers_RIGHT 
• 1xCangrejo_shell 
• 2xCangrejo_axes_link 
• 2xCangrejo_back_leg 
• 2xCangrejo_front_leg Electronic 

Components: 

• 1 x Freaduino UNO (Arduino UNO derivative) 
• 3 x Miniservos (ES08A or similar) 
• 1 x 8 AAA battery holder 

Optional Electronic Components: 

• 1 x Bluetooth module 

Hardware: 

• 8 x AAA batteries 
• 2 x M3x40 screw 
• 2 x M3x35 screw 
• 3 x M3x16 screw 
• 8 x M3x12 screw
• 15 x M3 nut 
• 4 x Little rubber bands 
• 6 x Rubber ferrule (10mm diameter) 

Build Instructions 

See the attached pdf (in Spanish). Pictures are clear enough to follow the steps even if you do not understand Spanish. 

Example code 

Attached you will find the Arduino programs. The principal program use the Oscilator librarie based on Ardusnake made by obijuan [see: http://www.thingiverse.com/thing:21401] 

Author Ana de Prado Navarrete 

Disclaimer This thing and all other published material cannot be considered as a final product of BQ and BQ takes no responsibility of its use. It must be considered as an experimental and early released product developed by the Innovation and Robotics Department staff with the intention to share it and test it as soon as possible within the community.