Sawppy Six-Wheel Mars Rover (Rocker-Bogie)

Model Overview & Print Notes

Summary A 3D-printed, motorized model of NASA's Curiosity and Perseverance rovers. Sawppy copies the real rovers' rocker-bogie suspension, so all six wheels stay on the ground over rocks, curbs and garden edges. Four corner wheels steer, which lets the rover turn on the spot. It is a sturdy platform for driving around the yard and for your own robotics software later. This is a refurbished remix of Sawppy the Rover by Roger Cheng ( https://github.com/Roger-random/Sawppy_Rover ). The photos show a community build by Kevin Nickels. Updated for modern use: one purchase list for the whole rover, a print list with counts and mirrored parts, cut lists for the frame and shafts, and one build guide in build order. What you build A body box of 15 mm aluminum extrusion joined by printed corners and clips Rocker-bogie suspension on both sides with a differential bar across the body Six driven wheels, four of them on steering corners 10 LX-16A serial bus servos on one daisy-chained bus: 6 drive the wheels, 4 steer the corners Battery tray, power panel with switch, fuse and voltmeter Files All 23 print-ready STL files Build guide PDF: print list, frame and shaft cut lists, actuator modules, wheels, suspension, body, wiring and first drive Bill of Material PDF with quantities, notes and a shop link for every part Print settings About 3 kg of PETG for the final rover (PLA is fine for a test fit). 0.4 mm nozzle, 0.2-0.3 mm layers, 3-4 perimeters, 30-40% infill. Small clips and couplers are printed in bulk (88 small clips, 12 large clips, 10 couplers), so print a few spares. Several parts come in left and right versions: print the mirrored copy in your slicer where the print list says so. Electronics 10 Hiwonder LX-16A serial bus servos and a USB bus servo adapter Raspberry Pi with a microSD card, fed by a 5 V buck converter 2S 5200 mAh LiPo battery, 10 A fuse, power switch and voltmeter Bill of Material Every part you need to buy, with quantities, notes and shop links, is in the Bill of Material PDF in the files of this model. Software Drive it from a phone browser with the SGVHAK rover software on a Raspberry Pi, or use the ESP32 or Arduino sketches from the source files. Give every servo its own ID before you chain them together; the build guide shows the order. Skill level Intermediate. You cut aluminum extrusion and steel rod to length, cut grooves for E-clips, ream 8 mm holes and set heat-set inserts. No soldering beyond the power switch, fuse and battery lead. Full build guide and source The build guide, source and all project files: https://github.com/ToolKnox/hawkridge-sawppy-mars-rover-rocker-bogie (Code > Download ZIP). Safety Use a balance charger and a LiPo bag, keep the fuse between battery and servos, and never leave a charging LiPo unattended. The servos are strong enough to pinch fingers in the steering joints. Sawppy is not waterproof. Instructions Print the 23 parts in PETG (0.2-0.3 mm layers, 3-4 perimeters, 30-40% infill), with the counts and mirrored copies from the print list. Cut the 15 mm extrusion and 8 mm rods to the lengths in the cut list. Then follow the Build Guide PDF in the files: actuator modules, wheels and corners, suspension, body and differential, power and wiring, software and first drive. The Bill of Material PDF lists every part to buy with quantities, notes and shop links. Build guide, source and all project files: https://github.com/ToolKnox/hawkridge-sawppy-mars-rover-rocker-bogie