feat: SaltyRover 4-wheel chassis design (#73)
Add parametric OpenSCAD designs for the SaltyRover stable 4-wheel
variant. Reuses existing 25mm stem, sensor head, and all SaltyLab
sensor mounts without modification.
Files:
- saltyrover_chassis.scad 480×500mm deck, stem collar, FC+Orin
standoffs, motor attachment holes, battery tray opening; RENDER
deck_2d for waterjet/CNC DXF
- rover_motor_mount.scad L-bracket + axle clamp plate per motor;
uses caliper-verified axle dims from BOM.md; dropout slot for
tool-free motor swap; RENDER bracket_2d for CNC DXF
- rover_battery_tray.scad Slide-out tray for 2-4 × 420×88×56mm
packs laid flat (low CG); T-slot rails, spring latch
- rover_stem_adapter.scad Flange + split clamp locks 25mm stem to
deck collar; 550mm stem option for rover height
- rover_BOM.md Assembly sequence, fastener table, mass
estimate (~13.4kg), height stack diagram
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
sl-mechanical
3e4764b3eb