I had the following criteria in mind to coose the components of the robot and to design the chassis that would hold them in place forming the robot:
- Ease of assembly/use
- Versatility (different behaviours)
- Adaptability to various coices of electronics and batteries
- Easy to print
- Parts easy to source
- Compact form factor
With this as guidance, the firs important decision was to choose among various alternatives for the motors: DC geared micro metal motors, 5v geared steppers, or 360º servos.
The DC motors and the steppers would mean to include aditional electronics. So I choose 360º micro servos, prioritizing the simplicity of the assembly over, for example, the accuracy of movements of the steppers or the strength of the geared DC motors.