This sections includes manufacturing instructions for the sheet metal and 3D printed parts of the backpack.
.SLDPRT and .step files of the sheet metal parts can be found in CAD/01. 3D_Drawings/02. Sheet_Metal_Components and CAD/02. Production_Drawings/02. Sheet_Metal_Components respectively. All sheet metal parts are designed for 3mm aluminum sheet metal.
Within CHARISMA, we let these sheet metal parts be manufactured by 247TailorSteel by uploading the .step files in SOPHIA. In SOPHIA, select
- Material: 3mm AlMg3 EN AW 5754 H111
- Cutting: Oxygen
If you design your own parts make sure that they are compatible with SOPHIA. You can find design guidelines here. If you choose a different manufacturer make sure you are complying with their guidelines (e.g. for bending parts and screw hole sizes and locations).
.SLDPRT and .3MF files of the 3D printed parts can be found inCAD/01. 3D_Drawings/01. 3D_Print_Components and CAD/02. Production_Drawings/01. 3D_Print_Components respectively.. All 3D printed parts have been printed with:
- PLA
- 30% infill
- Default settings in CURA (5.6.0)
Furthermore, all 3D printed parts have been designed to be used with heat set inserts. Insert the heat set inserts with a soldering iron. Tip: don’t insert the last bit of the insert with the soldering iron, but quickly push it in with a flat surface (e.g. a table) in order to make it flush.
If you use different heat set inserts than specified in the parts list (see Other Files), you may need to adjust the hole diameter of these parts. You can use the heat_insert_test_print.SLDPRT file as a test file for finding the proper hole dimensions. You also find these guidelines useful for adjusting the heat set insert holes.
You may want to apply vinyl wrap to the sheet metal to make it look more professional. You can roughly follow the steps described here. Furthermore, to remove excess vinyl wrap, you can also use a small file. This is especially handy for smaller parts and screw holes.
Comparison of backpacks with and without vinyl wrapping.
In the next section you can read on how to assemble the backpack.