Technical drawing of a roller mechanism with a motor, timing belt, pulleys, and a hinged arm, showing motion arrows.

Draw base frame (rectangle). Draw rollers (cylinders) in 2 rows, staggered. Add timing pulleys on roller shafts (small circles at ends of each roller). Draw timing belt loop over pulleys — show teeth engaging (small notches optional). Place motor pulley on first roller; draw motor. Add hinge at one end (or section) for lift. Add idler pulley(s) to adjust belt tension at hinged section. Optional: arrows for direction of motion and dashed lines for lifted position. See more