Practice: Indexer Centering
The 1C capstone — a ball-centering indexer mixing belts, chain, gears, and crush blocks. Least guidance, most synthesis.
01
Indexer Centering
Model a centering indexer for 9.5 in balls — belts, chain, gears, and crush blocks together.
- Rollers and wheels keep the ball centered as it moves.
- Inspired by 1678's 2022 robot.
- Everything you've learned, in one mechanism.
FUSION 360 · SCREENSHOT
add → course-shots/1c-08/1.png
FIG 1
Key Specs
Geometry
- Ball 9.5 in dia; 2x1 thin-wall tube
- Shaft 1/2 in rounded hex
- 6 in REV Omni-wheels
Power & Tools
- 48T HTD pulleys, 30T gears
- AltSkripts Belt Generator + Shaft Endings
- AltSkripts Part Lighten for the plates
02
You Finished Stage 1C
That's eight mechanisms with steadily less hand-holding.
- You can model intakes, rollers, shooters, climbers, and gearboxes.
- You mixed COTS, 3D prints, and custom parts.
- Next: Stage 1D — top-down design of a whole drivetrain.
Recap
INDEXER CENTERING
- Centering indexer: belts + chain + gears
- Crush blocks: side holes + chamfers
- Part Lighten the plates; name everything
- Stage 1C done → on to top-down design
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.