Components list
- Raspberry Pi 3B+
- 2x Pololu metal gear motors 210:1 6V HP
- MDD3A motor driver
- 9g Servo motor
- Wheels: 60mm x 8mm
- Battery 7.4v - Dimensions LxWxH: 66mm x 34mm x 16mm
- Raspberry Pi Camera v2.1
- 5v regulator - 58mm x 32mm mounting posts (centre to centre, the measurements on the site are wrong)
- 3D printed ball caster 20mm apart 3mm holes
Gripper requirements
- Ease of use
- How easily can you attach it to a chassis mounting footprint, and how securely does it contain the 5cm cube.
- Simplistic design
- In terms of manufacturing it is again important it is easy for a 3D printer to make, and the smaller the faster and cheaper it is as well.
- However, effectiveness is rated higher than making it smaller. Don’t compromise your designs too much.
3D Printing Design Rules
Chassis Considerations
- Easily accessible battery
- It is important to be able to access the battery easily to charge your robot or swap out a low voltage battery
- Good camera placement/angle
- It is important that the camera has good placement, this means not having your sample management or other components blocking its view and placing it in a sensible spot (recommend front middle of robot for ease of use)
- Ease of manufacturing
- There are limitations to 3D printing and laser cutting manufacturing, these need to be considered and the simpler your design is to make the lower the cost in a real world environment, which is a big component of engineering design.
- The smaller and more compact the robot the easier it is to manufacture and use as well.
- Aesthetics
- Having the robot look nice will be a minor criteria, but it’s still somewhat valued to have some cool and unique look to your robot. Get creative!