Methods and Construction

In the two stages of the paper folding mechanism, the parts almost the same with different orientation. Each stage will consist of paper tray, set of roller, electric motor, and actuators. The paper tray will have two levers arm that moves 180 degree to fold the paper. The lever will be connected to the paper tray using a shaft that connected to the output shaft of electric Motor. Electric motors will be connected to the outer side of the machine frame. The set of roller will be placed along the paper tray to move the paper from one stage to another. 

Manufacturing issues

Machining of the parts will be difficult task due to several reasons. For instant, if the first stage arc that supposed to fold the top corner of the paper from the top middle 45 degree is off the right dimensions this might lead to error in the final design of the paper airplane which might threaten the whole process. On the other hand, the machine must be build that exactly fit the paper with no extra space for the paper to slip out of track. After assembling all the parts together several manufacturing issue were discovered. The width of the paper tray supposed to be as the width of A4 paper, but unfortunately the width of the paper tray is slightly bigger that the width of the paper which makes the paper slip off the track. The shafts alignments are off that create a lot of friction with the service of the paper tray. Paper stuck at the folding arc after it is being fold 45 degree from the top corner due to design and manufacturing issues. Electric motors that were purchase have high speed with low torque, sometime when they are under high load they stop working. Also, second stage groove that make the bottom of the paper airplane is not slippery enough to push the paper down and move the paper to the lunching. 

Drawing Tree

The folding mechanism consists of three stages, each stage has specific number of part. First stage consist of two rod, six roller, paper tray and folding arc as shown in Appendix 3-B. Second stage parts are: five gears, rod and paper tray. The following drawing tree ends at the finished product.