Gears and transmission
Competition Sumo Robot - Wedge Front 2WD
- Bounding box
- 339.5 × 285 × 79.4 mm
- Engine
- 3D Printing B-rep
- Parameters
- 64
- Published
- November 13, 2026
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The prompt
Design a compact, aggressive 2-wheel-drive competition SUMO ROBOT. Main chassis: 260×200×6 mm plywood. 2 STD D-shaft gear motors. 2 wheels: Ø50×20 mm. Controller board: 100×60 mm. Battery holder: 76×61 mm. 5 ultrasonic sensors and 3 HW-870 IR sensors. Create a low-profile, wedge-front body with angled side armor, protected wheels, low center of gravity, and a professional competition appearance. Make the front wedge a separate removable part. Keep the design manufacturable from flat plywood using screws and simple cuts. Do not invent unknown motor or sensor mounting dimensions; leave those interfaces adjustable. Generate the 3D CAD model with a realistic mechanical layout, not a simple rectangular box.
Parameters
| Name | Value | Range |
|---|---|---|
| Chassis width | 260 mm | 180 – 320 |
| Chassis depth | 200 mm | 140 – 260 |
| Plywood thickness | 6 mm | 3 – 12 |
| Chassis bottom height above ground | 15 mm | 8 – 30 |
| Adjustable slot width | 6 mm | 3 – 12 |
| Adjustable slot length | 30 mm | 12 – 60 |
| Wheel diameter | 50 mm | 30 – 80 |
| Wheel width | 20 mm | 10 – 35 |
| Wheel centre X offset | 140 mm | 100 – 180 |
| Wheel centre Y offset | -55 mm | -120 – 20 |
| Wheel axle height | 25 mm | 12 – 40 |
| Motor body length along axle | 34 mm | 22 – 60 |
| Motor body width | 50 mm | 30 – 80 |
| Motor body height | 24 mm | 16 – 50 |
| Motor shaft diameter | 5 mm | 3 – 10 |
| Motor shaft length | 30 mm | 15 – 60 |
| Wedge width | 220 mm | 160 – 280 |
| Wedge length along slope | 90 mm | 50 – 140 |
| Wedge plywood thickness | 6 mm | 3 – 12 |
| Wedge rear top height | 24 mm | 18 – 40 |
| Wedge vertical drop | 18 mm | 5 – 40 |
| Wedge rear Y start | 95 mm | 60 – 120 |
| Armor length | 180 mm | 120 – 220 |
| Armor height | 45 mm | 25 – 80 |
| Armor plywood thickness | 6 mm | 3 – 12 |
| Armor centre Y offset | -5 mm | -40 – 40 |
| Armor centre X offset | 160 mm | 130 – 190 |
| Armor outward lean angle | 10 deg | 0 – 30 |
| Armor bottom height | 8 mm | 2 – 20 |
| Mounting tab X length | 35 mm | 20 – 50 |
| Mounting tab height | 6 mm | 4 – 12 |
| Mounting tab depth | 15 mm | 8 – 30 |
| Controller mount width | 100 mm | 60 – 140 |
| Controller mount depth | 60 mm | 40 – 100 |
| Controller mount plate thickness | 3 mm | 2 – 8 |
| Standoff height | 10 mm | 4 – 25 |
| Standoff diameter | 6 mm | 3 – 12 |
| Controller centre Y offset | -60 mm | -100 – 20 |
| Battery bay width | 76 mm | 50 – 120 |
| Battery bay depth | 61 mm | 40 – 100 |
| Battery tray base thickness | 4 mm | 2 – 10 |
| Battery retaining wall height | 15 mm | 8 – 35 |
| Battery retaining wall thickness | 4 mm | 2 – 10 |
| Battery tray centre Y offset | 20 mm | -20 – 80 |
| Ultrasonic rail width | 220 mm | 150 – 280 |
| Ultrasonic rail height | 20 mm | 10 – 40 |
| Ultrasonic rail thickness | 8 mm | 4 – 16 |
| Ultrasonic rail Y position | 92 mm | 50 – 130 |
| Ultrasonic rail centre Z | 48 mm | 25 – 90 |
| Sensor body width | 28 mm | 16 – 45 |
| Sensor body depth | 14 mm | 8 – 30 |
| Sensor body height | 22 mm | 12 – 40 |
| Sensor spacing | 40 mm | 25 – 70 |
| Number of ultrasonic sensors | 5 mm | 3 – 7 |
| IR rail width | 180 mm | 120 – 240 |
| IR rail height | 10 mm | 5 – 25 |
| IR rail thickness | 6 mm | 3 – 14 |
| IR rail Y position | 94 mm | 50 – 130 |
| IR rail centre Z | 10.5 mm | 5 – 30 |
| IR sensor width | 18 mm | 10 – 30 |
| IR sensor depth | 10 mm | 5 – 20 |
| IR sensor height | 12 mm | 6 – 25 |
| IR sensor spacing | 70 mm | 30 – 100 |
| Number of IR sensors | 3 mm | 1 – 5 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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