Using Passive Guide Fins/Ramps/Wedges to Index Balls?

3512 came up with a question today, and were wondering if anyone else had tested this: can you index 2022 balls with passive fins/ramps inside a conveyor or intake? Cargo does not deform anywhere close to the amount 2020 power cells do.

We document pretty heavy during build season so here’s our conveyor setup and some videos:

2 Ball Feed Test

2 Ball Start Up Test

1 Ball Resistive Test

You can see during the 1 Ball Resistive Test that when the ball gets pressed against something, it can translate side to side. This got us thinking that these balls could be translated with a passive fin/ramp/wedge.

Has anyone tested this? Would anyone like to? Is this worth it over ViW?

We’ll most likely test this on Monday or Tuesday and post an update!


We did some basic testing (putting a piece of plywood behind a spinning roller) and it seems to slide nicely to the side. One of our current indexing plans is just 2 wedges behind a roller to center the ball before heading up to the launcher. I don’t know when we will get to do further testing.


Yessir 131 teeth. Teeth counts that end in 1s have 10% more traction.

(For context - our 2021 bot had a variety of belt sizes, including 71 teeth, 131T, 82T, 89T, and 121T.)

V-belt-guys just makes it so easy to get whatever size you want at a low price - so much so that it just became easier to buy a weird size and throw the extras away at the end of season than to redesign something.

1 Like

Yes. We have tested this and it works while a robot is sitting in the floor. Our concern is that when a robot is moving around, a passive indexing system won’t do us any favors.


This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.