After showing Ben this prototype, I got several suggestions.
Lasercutting the gear
Using Derin or other metal and lasercut the gears. If I want more accuracy, I need to consider buying those existing gears.
Make the piece a whole
In the movement, the wood panels are actually shaking due to the force. So in order to make it more robust, I should use some standoff to make all the wood connected. Also, if possible, make the wood struction next to each other as a whole piece.
Assembly
the assembly process is really complicated. That is why I should use stand off. If there are extra wood structure to keep all the wood in shape as previous one do, it would make it too complicated if I want to do some modification to the structure. Everytime, I will need to take the exta wood structure off.
CNC
Ben ask me to do the CNC on othermill machine because my piece is small. Later I figure out it is a terrible idea because every piece would take 3 hours and I might spend 24 hours looking at CNC machine for one machine. Because Othermill can only use 1⁄8 inch end mill so it would definitely takes longer time.
However, thanks to Makerspace, I got the training of the CNC machine in Makerspace of Tandon. Their machine is Shopbot and is compatible with Fusion 360. That is a good news but also a bad news for me.