Top Cover
Grab the 3D printed top part and the 2.2" PiTFT. We need to test the tolerenaces to ensure everything is going to fit right.
Test Mounting Pegs
Line up the buttons cutouts with the ones on the display and place the top part over the display. Press down on the corners to get the pegs to insert into the mounting holes on the PiTFT PCB.
Test Spacers
The two 3D printed spacers have holes on boths sides. They should fit into the pegs on the top and bottom parts. These spacers keep the two PCB's from bending and closing in on each other.
Bottom Cover
Grab the 3D printed bottom part and the Raspberry Pi A+. We'll also test the tolerances on these two. Place the part underneath the PCB and press down on the corners to insert the pegs into the mounting holes.
Install Spacers
Remove the top and bottom parts from the PCB's and install the PiTFT onto the Raspberry Pi A+. Fit the two spacers on the ends near the tactile buttons. You can add a very small amount of mounting tack to keep them from falling out.
Install Circuit into Case
Insert the PCB at an angle with the ports going in first. Press the PCB down into the case and pull the edge with the clips outward a bit to let the side with the GPIO fit.
Ports
The ports should line up with the cutouts on the case. At this point you should check the spacers are still in the right spot. Make sure the holes are lined up.
Install bottom part
Grab the bottom part and line up the SD card cutout with the cutout on the case. Press down on the corners to fit the pegs through the mounting holes and through the spacers .
Install Rubber Actuators
Insert the ninjaflex buttons into the cutouts on the top cover part. They'll have a slightly lose fit so you need to hold them down while installing the cover to the display.
Install Top
Hold the top part face down, so they buttons don't fall out. Place the case part onto the top cover. Press the two parts together and make sure the corners snap together.
Final Enclosure
Yay it's done! If everything snap fits together nicely, you should be good to install an SD card and power up your tiny Raspberry Pi project.
Install SD card
The cutout on the bottom part of the enclosure should let you insert a microSD card.
Tolerances aren't right?
If you find the pegs from the 3D printed parts don't fit into the mounting holes, you may need to level your printers bed and ensure its not too tight. Alternatively you can resize the diameter of the pegs in CAD or carefully sand them.
Pegs Break?
They pegs should be pretty ridged and withstand several installations. If you find they easily break off, you may want to turn off your retraction in your slicing software. I’ve personally found Makerware has this problem. Try CURA or Slic3r instead.
Top and Bottom covers don't fit?
If the corners don't quite snap into the case, the spacers are most likely not aligned properly, causing the pegs to only insert half way through. Use a thin pointy tool to poke the spacers and align them into place.
