A Simple Direct Current Electric Motor

thingiverse

It appears to be an instructional document for assembling a DC model motor using 3D printing technology. The document provides step-by-step instructions on how to assemble the motor, including printing and cutting parts, installing shims, winding coils, and attaching the armature to the base. The document also includes information on how to complete the base of the motor, install magnets, and attach a switch lever. It mentions that a drop of vegetable oil can be used to help the engine run smoother and quieter. The document provides an estimated duration for printing the parts (8 hours) and assembling the project (2 hours). It also lists the required materials and preparation steps needed before starting the project. Finally, the document includes references to secondary school physics books and a Wikipedia article on DC motors, suggesting that it is intended as an educational activity to help students understand the principles of electric motors.