Brackets and mounts
Robot chassis base
- Bounding box
- 200 × 200 × 4 mm
- Engine
- 3D Printing B-rep
- Parameters
- 29
- Published
- November 9, 2026
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The prompt
Generate an OpenSCAD script for a 3D printable robot chassis base. The base must be a flat rectangular plate of exactly 200x200 mm with a thickness of 4 mm. Place the origin (0,0) at the bottom-left corner. The bottom edge (Y=0) is the REAR of the robot, and the top edge (Y=200) is the FRONT. CRITICAL INSTRUCTION (Anti Z-Fighting): To prevent floating skins or depressions when the model is printed, ALL boolean subtraction cuts MUST be extruded from Z=-2 to Z=6 (a total cut height of 8 mm). STRICT PROHIBITIONS: DO NOT create any "Arm Area", engravings, visual guides, or shallow depressions. The top and bottom surfaces of the base MUST remain 100% flat and untouched, except for the holes listed below. Perform the following boolean operations (subtractions only): Wheel Wells: Subtract two rectangles on the left and right edges at the rear. Left well: X=0 to 35, Y=0 to 70. Right well: X=165 to 200, Y=0 to 70. Encoder Slots: Subtract two horizontal rectangular slots (27 mm horizontal by 8 mm vertical, centered at Y=35). They must be exactly 12.5 mm inwards from the wheel wells. Left slot: X=47.5 to X=74.5, Y=31 to Y=39. Right slot: X=125.5 to X=152.5, Y=31 to Y=39. Motor Cable Routing Holes: Subtract two 10x10 mm square holes. Place them in front of the encoders and moved outwards towards the sides (between the wheel wells and the encoders). Left hole: X=37 to 47, Y=55 to 65. Right hole: X=153 to 163, Y=55 to 65. Center Cable Hole 1 (Lower): Subtract a 10x10 mm square hole in the center. X=95 to 105, Y=25 to 35. Center Cable Hole 2 (Upper): Subtract a 10x10 mm square hole slightly above. X=95 to 105, Y=50 to 60. Ball Caster Hole: Subtract a circle with a diameter of 4 mm centered at X=100, Y=166. PCB Mounting Holes: Subtract four circles of 3.2 mm diameter (for M3 screws). Coordinates: (X=60, Y=80), (X=140, Y=80), (X=60, Y=140), (X=140, Y=140). The script must be clean, well-commented, and use variables for dimensions so I can easily adjust the parameters later. Output only the OpenSCAD code."
Parameters
| Name | Value | Range |
|---|---|---|
| Base width | 200 mm | 100 – 400 |
| Base depth | 200 mm | 100 – 400 |
| Base thickness | 4 mm | 2 – 10 |
| Wheel well width | 35 mm | 20 – 80 |
| Wheel well depth | 70 mm | 30 – 150 |
| Right wheel well X start | 165 mm | 100 – 250 |
| Encoder slot length (X) | 27 mm | 10 – 60 |
| Encoder slot width (Y) | 8 mm | 5 – 30 |
| Left encoder slot X start | 47.5 mm | 20 – 100 |
| Left encoder slot Y start | 31 mm | 10 – 100 |
| Right encoder slot X start | 125.5 mm | 80 – 220 |
| Right encoder slot Y start | 31 mm | 10 – 100 |
| Motor cable hole size | 10 mm | 5 – 30 |
| Left cable hole center X | 42 mm | 0 – 200 |
| Left cable hole center Y | 60 mm | 0 – 200 |
| Right cable hole center X | 158 mm | 0 – 200 |
| Right cable hole center Y | 60 mm | 0 – 200 |
| Center cable hole size | 10 mm | 5 – 30 |
| Center cable holes center X | 100 mm | 0 – 200 |
| Lower center cable hole 1 center Y | 30 mm | 0 – 200 |
| Upper center cable hole 2 center Y | 55 mm | 0 – 200 |
| Ball caster hole diameter | 4 mm | 3 – 8 |
| Ball caster hole X | 100 mm | 0 – 200 |
| Ball caster hole Y | 166 mm | 0 – 200 |
| PCB mounting hole diameter | 3.2 mm | 2.5 – 6 |
| PCB hole spacing X | 80 mm | 20 – 200 |
| PCB hole spacing Y | 60 mm | 20 – 200 |
| PCB pattern center X | 100 mm | 0 – 200 |
| PCB pattern center Y | 110 mm | 0 – 200 |
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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