Part E : Small wheel
Small wheel is assembling at the bottom part of Multi-spinner to help the robot rotate smoothly. There is a problem encounter when fixing the small wheel.
Problem : Multi-spinner can performs three jobs by using only a robot, which are cooling the laptop, cutting paper, and cleaning the table. the robot needs to move and rotate only when performing job as table duster. Other jobs is just holding the robot by hand or just put on the table. The small wheel disturbing the rotation of the blade when performing job as laptop cooler and paper cutter.
Solution : Two stoppers are assembling to hold the small wheel and make it stays in one position when performing the job as laptop cooler and paper cutter. This stoppers are flexible. There are just like a lock, which can be open when cleaning the table and close when cooling the laptop and cutting the paper.