Make a press fit system means that you must design and build a structure considering the mechanical tolerances in the process in order to assemble it without glue, screws or any other thing. For this assignment I have to do a pressfit system using the lasser cutting machine and I have to experiment until get the parameters in order to obtain a stable structure.

Arduino is an open source electronic hardward which is very popular in the maker community. It is used to program microcontrollers in a simple way and it is very common use it with a protoboard where you can prototype a circuit and test your arduino programs. So I decided for this assignment to design and build an arduino+protoboard pressfit case.

Photo 1:Arduino + protoboard

The concept is to fabricate a case which could be used as a foldable portable case circuit.

Photo 2:Inventor interface

Photo 3:Assembly parts

Photo 4:More Assembly parts

Photo 5:Complete Assembly

Then you can create drawing views and export them to dxf format to use with the lasser cutting machine:

Photo 6:Drawing views

Photo 7:Pressfit bracket

After doing some tests with the machine I found that the tolerances for acrylic 3mm width (no calibrated) is 0.2mm for pressfit. I recomend use calibrated acrylic because it has a uniform surface which is better for the pressfit conections .

Photo 8: Laser-cut on acrylic

Do not forget always verifying that the scale factor of the machine software is in 1:1,because the following may occur:

Photo 9:Scale error

Photo 10:Real assembly open case + protoboard + arduino

Photo 11:Folding

Photo 12:Folded

Also I was playing with the vinyl cutter ...

Files:

mediafire

Github

See you soon.