This paper prototype of a desktop 3D printer was created in order to test the usability of a modified interface and material loading operation. The new design incorporates a larger screen and front loading cartridge based material loading.
Existing System
The existing printer which was observed to understand issues
Due to the confined areas that desktop 3D printers are used having to access the back of the printer during material replacement is difficult. Also the low angle of the interface and small screen requires the user to view it from uncomfortable angles.
Wireframe Development
Interface screens were developed by hand
The sequence of interaction was developed. The new interface includes a status area, indication of material left, and a progress bar for processes such as heating the print head and loading material.
Proportions of the interface were mapped out with tape
Blank screens were created with areas for progress bar and selections.
Screens were created with areas removed to allow for moving progress bar.
Model Assembly
The physical form for testing loading was laser cut from cardboard.
User Testing
User testing was conducted while having a person act as the "machine"
Users commonly attempted to treat the display as a touch screen despite the large interaction knob.
The interaction with the prototype produced less pain pain points than the existing design.