Wire up the plotter to the Pi¶
The three servos need to be connected to the Raspberry Pi
The Raspberry Pi doesn’t have enough 5V pins to use one for each servo, so you will either need to solder together a wiring loom from some strands of ribbon cable as shown below, or use a breadboard.
shoulder motor: GPIO pin 14
elbow motor: GPIO pin 15
lifting motor: GPIO pin 18
These correspond to pins 4-12 on the Pi’s header. See https://pinout.xyz.
It’s wise to do this with the Pi turned off until you become confident that you’re doing the right thing and won’t destroy your Raspberry Pi.
On the other hand it seems that these devices can take a great deal of abuse very well.