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
| Day | Task | Method | Notes |
|---|---|---|---|
| 1-2 | Install second 775 motor + gearbox for skid steering | BaneBots motor, mount plates | Wire to BTS7960 motor driver. Independent control per side = skid steering. |
| 2-3 | Wire RC receiver → Arduino → motor drivers | FlySky FS-i6X, Arduino Mega #1 | Basic RC control: left stick = left motor, right stick = right motor. E-stop on channel 6. |
| 3 | Install E-stop mushroom button | Wiring, panel mount | THIS IS NOT OPTIONAL. Wire between battery and everything else. Test it. Test it again. |
| 3-4 | Test drive: flat ground | RC control | Forward, backward, pivot turn, gentle curves. Verify both motors respond correctly. |
| 4 | Test drive: stairs with 50lb sandbag | RC + manual supervision | SOMEONE MUST SPOT THE ROBOT. Start with 50lbs, work up to 100lbs. |
| 4-5 | Test drive: outdoor terrain | RC control | Grass, gravel, sidewalk. Note what stalls the motors, where traction fails. |
| 5 | Install all-terrain rubber track overlay | Glue/bolt to track pods | Improve grip based on terrain test results. |
| 5-6 | Mount outer torso panels (3D printed, from Week 2-3 queue) | Bolts, clips | First cosmetic parts attached. Check fit — if printing drift, reprint affected sections. |
| 6-7 | Begin head shell post-processing | Sand 120→240→400, filler primer | Head 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. |
| 7 | Begin track cover post-processing | Sand, fill, prime | Simpler 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).
Print Queue
Head shell finishing → nose/radar/antenna → arm covers begin