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Lewis Documentation
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Release status: Experimental

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A less linear RepRap
CAD Models
External Link


The RepRap Lewis is named for Edward B. Lewis, an American Geneticist. The primary design goals are accessible documentation and high replication ability. All working documentation and recommendations are stored on the RepRap wiki.

Design Constrains

This is an entry into the Gada Prize. Following, our design goals match the prize requirements. Unique ones for Lewis are as follows.

  • Complete mechanical assembly can fit into a small flat rate USPS box (about 220mm x 135mm x 41mm)


The table below outlines the specifications of the current machine.

Metric US Imperial
Manufacturer RepRap (or anyone who wants...)
Model Lewis
Technology FFF (Fused Filament Fabrication)/Thermoplastic extrusion
Estimated cost €400 $520
Size 500 mm (W) x 400 mm (D) x 360 mm (H) 20” (W) x 16” (D) x 14” (H)
Weight 7.0 kg 15.5 pounds
Build Envelope 200 mm (W) x 200 mm (D) x 140 mm (H) 8” (W) x 8” (D) x 5.5” (H)
Speed 15.0 cm3 per hour solid (test done for PLA, similar for others). Maximum X and Y axis speed of 725mm/s. 0.92 inch3 per hour solid (test done for PLA, similar for others)
Accuracy Diameter of nozzle 0.5 mm, 2 mm min. feature size, 0.1 mm positioning accuracy, layer thickness 0.3 mm Diameter of nozzle 0.020”, 0.080” min. feature size, 0.004" positioning accuracy, layer thickness 0.012”
Volume of printed parts to replicate 1110 cm3 67.7 inches3



Photos and Drawings

Release Info

0.10 (2012/xx/xx)

Release Candidate (2012/xx/xx)

Beta (2012/xx/xx)

Alpha (2012/xx/xx)

  • Initial positioning system with support for 1 extruder.