1. Car Assembly
Note: The acrylic plates next to the bearing in the two wheels are of opposite faces, as shown in the following figure.
Back Half Chassis + Rear Wheels
Back Half Chassis + Copper Standoffs
Before installing the servos, we need to adjust them to 90°. But why? The reason is that the servo we used rotates in a range of 0-180°. If the rotating in usage is beyond the allowed range, the servo may burn out. So before assembly, we need to adjust the servo shaft to 90°, and install the servo based on the instructions, ensuring the assembly won’t go beyond limitations.
The easiest way is to connect the servo to a Raspberry Pi and PCA9685 PWM driver board, or an Arduino board, and give the servo PWM signals so as to adjust the shaft to 90°. So it’ll be done!
There is a tricky way to do this, as the method 1 may be a little troublesome. Follow the tutorial below carefully. It may seem complex, but once you start, you will find it quite simple.
Thus the servo shaft will be in the 90° position. For fine adjustment, just leave it to related code.
At last, remove the rocker arm without moving the shaft. If the shaft moves just a little, it is acceptable. Minor mistaken movement needs no adjustments.
You’re recommended to take all those three servos out from the package for adjustment prior to assembly, so the whole process will be simpler.