WEEK 4

Base Testing, Second Motor, Print Post-Processing

Dual-motor skid steering working. Base platform fully tested under load. Begin post-processing first batch of prints.

Est. Hours
30h
Est. Spend
$0
Tools Required
FlySky FS-i6X RCArduino MegaMIG weldersandpaper (80-2000 grit)filler primer

CAD FILES

motor_mount_v2.dxf

PRINT FILES

head_shell_finish.stlnose_radar_antenna.stl

Goal

Dual-motor skid steering working. Base platform fully tested under load. Begin post-processing first batch of prints.

Day-by-Day Tasks

DayTaskMethodNotes
1-2Install second 775 motor + gearbox for skid steeringBaneBots motor, mount platesWire to BTS7960 motor driver. Independent control per side = skid steering.
2-3Wire RC receiver → Arduino → motor driversFlySky FS-i6X, Arduino Mega #1Basic RC control: left stick = left motor, right stick = right motor. E-stop on channel 6.
3Install E-stop mushroom buttonWiring, panel mountTHIS IS NOT OPTIONAL. Wire between battery and everything else. Test it. Test it again.
3-4Test drive: flat groundRC controlForward, backward, pivot turn, gentle curves. Verify both motors respond correctly.
4Test drive: stairs with 50lb sandbagRC + manual supervisionSOMEONE MUST SPOT THE ROBOT. Start with 50lbs, work up to 100lbs.
4-5Test drive: outdoor terrainRC controlGrass, gravel, sidewalk. Note what stalls the motors, where traction fails.
5Install all-terrain rubber track overlayGlue/bolt to track podsImprove grip based on terrain test results.
5-6Mount outer torso panels (3D printed, from Week 2-3 queue)Bolts, clipsFirst cosmetic parts attached. Check fit — if printing drift, reprint affected sections.
6-7Begin head shell post-processingSand 120→240→400, filler primerHead printed during Week 3-4. Now sand, fill, prime. This is SLOW — 2-3 coats of filler primer with sanding between each. Don’t rush it.
7Begin track cover post-processingSand, fill, primeSimpler than head — larger flat surfaces, fewer details. Good practice before head detail work.

Skills Practiced

Motor wiring, RC integration, safety systems, 3D print post-processing (sanding, filling — learn on track covers before touching the head).

Head shell finishing → nose/radar/antenna → arm covers begin