Working ball robot

thingiverse

This is a 160mm wide ball robot prototype, wich uses two modified servos as motors, an arduino and a bluetooth module for control and a entirely 3d printed frame. I will complete the full instructions soon. If you want a smaller robot, check my version 2 here:http://www.thingiverse.com/thing:1458520 More projects here: https://juangg-projects.blogspot.ca Print Settings Rafts: No Supports: No Resolution: 0.3 Infill: 60% or above for ther ball and 20-30% for the rest. Notes: I printed it with pla, but abs should work well. If printing with abs, be carefull with wrapping or the two sides of the ball wont fit properly. Instructions 1) 3d printed parts: -Print all of them, except the magnet support where you have to choose between the simple one, or the V2, wich includes a servo. -Allso you can print the central part of the sphere in two halves or all together. -I printed all the parts (except the head) at 0.3 mm layer height, but 0,2 works well. -Please use high infill for the ball, specially side 1 and side 2 (60-80%) 2) Non 3d printed parts used: -Two modified Futaba S3003 servos, or any standard servo modified for continuous rotation. -One 9 gr micro servo -Some magnets (I took one from a hard disk and the others from a magnet game, but use whatever magnets you want) -2x10 mm wood screws for the internals -3x15 mm wood screws for the ball -some zip ties -Plastic glue (I used super glue) -Some 6 mm plastic bbs -Control Board: ·Arduino Nano ·L293D motor diver ·Hc-06 Bluetooth module ·MPU 60-50 (I havent tried it yet) ·Usb conector ·5 volt battery (any external phone battery will work) 3) The assembly -Sphere The two halves of the central sphere (If you have printed it in one time obiously skip this step) Glue them together. Put some wheight on it. Screw the two sides to the central part. Sand it until its smooth. Note where does each side go and in what position. -The internals Parts needed. Place the two modified servos on its place. Screw them in place. Attach the flywheel. Parts needed. Fix the magnet to the servo with zip ties. Screw the micro servo to the support. Add another zip tie. Fix it to the internal frame. Screw it to this side. -The head support: Parts needed. Place four bb´s on their holes. Push them down until it goes through its hole. With that result. Place the bb´s again and cover it with that piece. Put your magnets there. Glue it to that. Add a cable to secure that cover or simply glue it. Remember to put the smooth side facing down.