Summary I made my own robotic arm, it works with arduino uno and 5 servomotor of 10 kg and a mini servo, you can print it and if you want I send you my code. you must print all the pieces, it works good and is a good project for school. print it with a density of 30 % in order to be light. Print Settings Printer Brand: Prusa Printer: Prusa Steel Rafts: No Supports: No Resolution: 2 Infill: 30% Overview and Background . . Lesson Plan and Activity . . Materials Needed materials Servomotor 10 kg X 5 mini servo X1 arduino UNO X1 screws