Layout Sketch
Build the master layout — side and top profiles that set every critical drivetrain dimension in one place.
01
Two Layout Profiles
Sketch the drivetrain from the side and the top.
- Side: height, tube placement (1.75 in off the ground for the modules), wheel clearance.
- Top: the footprint and module mounting offsets.
- Together they pin every critical dimension.
FUSION 360 · SCREENSHOT
add → course-shots/1d-03/1.png
FIG 1
02
Make It Parametric
Reference dimensions between sketches instead of repeating them.
- Set the side length equal to the layout tube length.
- Use joint origins to link the sketch planes.
- Circular Pattern the corner geometry to all four corners.
FUSION 360 · SCREENSHOT
add → course-shots/1d-03/2.png
FIG 2
Key idea
Capture the essential dimensions once, centrally.
That's what makes the whole model flex.
Recap
LAYOUT SKETCH
- Side + top master profiles
- Modules sit 1.75 in off the ground
- Reference between sketches; pattern corners
- Big dimensions only — keep it lean
Your Task
Build this
- Model what this lesson covers in Fusion 360.
- Use the AltSkripts tools where they apply.
- Save it with a clear name.
How to submit
- In Fusion: Share → Public Link → Copy.
- Paste the link below.
- A coach reviews it in AltHub.