3D Prototyping + Design



Residual Lines (2025)
3D modeled + printed components



Residual Lines (2025)

Custom 3D-printed CNC components integrate motion, sensing, and redaction

Electronics: ESP32, stepper motors, relays, LED, photoresistor

Materials: ASA, PLA, TPU, MDF

Dimensions: 60 × 38.5 × 54 cm

The mechanical system of Residual Lines is built from a series of custom 3D-printed parts that integrate sensing, motion, and material handling into a unified redaction mechanism. An open-source CNC design was modified by fixing the Y-axis and consolidating movement along a single linear rail, allowing the pulling of the receipt paper to define vertical motion and reducing mechanical complexity. This redesign improved reliability while foregrounding the redaction process as a visible, physical action.

Custom-designed housings precisely align the LED and photoresistor PCBs within the receipt reader, creating a controlled optical environment that minimizes ambient light interference and ensures consistent detection of marked text. Additional printed components, including motor mounts, pen sliders, rollers, gears, and guides, were fabricated in ASA, PLA, and TPU to balance rigidity, flexibility, and durability. Together, these parts maintain accurate paper tension, repeatable pen pressure, and synchronized motion, enabling the system to translate digital Wikipedia edits into a repeatable, mechanical act of censorship.

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Heat Mapping Entropy (2026)
3D modeled + printed components



Heat Mapping Entropy (2026)

Custom 3D-printed heat stylus and holder with CNC-milled heat-coil PCB

 Materials: ASA, copper board FR1 

Stylus dimensions: 7.6 x 5.7 x 7.6 cm

For Heat Mapping Entropy, a custom 3D-printed heat stylus and holder were developed to enable controlled, localized thermal input into the system. The stylus houses a DIY CNC-milled heat-coil PCB, allowing heat to be applied precisely and with consistent temperature to the metal surface. The printed enclosure insulates the user’s hand while maintaining a consistent contact geometry between the heating element and the sensor field.

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© Lauren Walker,  2026