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We do not have access to swerve modules and it appears that there is a general discouragement for defense this year (the semi-separated field setup included) so not having as much pushing power wouldn't be a deal breaker. Also, with many of the RI3D teams either going swerve or tank, we thought it may be helpful to the community to provide another example option for a drive train.

@ interesting. And good point about the defense. That makes more sense after hearing someone else explain it.

All of our files are linked on our chief delphi thread: www.chiefdelphi.com/t/ri3d-umn-robotics-2025/478147

Unfortunately not. Because we went with a leadscrew design (materials we had on hand) there was a miscalculation and the entire weight of the robot would be held by a 3d printed part. We discovered this at about 7am the last day, and then just taped on the climbing hook as it couldn't work anyway. In an ideal world where that part wouldn't be crushed/slip yes it could.

we plan on releasing a BoM soon!

Here is a link to our BOM: drive.google.com/file/d/1TwSpJTbXJ69ptBuZp_Ck0NZtJcqNmxZ5/view

You can email us at robotics@umn.edu or message us on our chiefdelphi post here which many team members are actively monitoring: www.chiefdelphi.com/t/ri3d-umn-robotics-2025/478147/13

Yes, an Epic fan 🙌

I was on the team and I believe I overheard that song being considered for this video!

Yay, robotics Epic fans!!! :P I got so excited when I saw they named their robot Poseidon.

Nahh u cant

It’s illegal to touch the top of the chain and punished by a major foul I believe

CAD will hopefully be released Tuesday afternoon

We do not plan to pick up coral from the ground, only from Coral Station.

This recently changed and we now plan to be able to pick up coral from the ground with a modification to our intake, take a look at our day 2 update video to get a glimpse of this in CAD!

@@jaceflansburg ok thank u👍

@@skyblaze103 wow

We are currently finishing the manufacturing of our digging system. It will be on a lift that lowers it into the ground for digging and then raises it up out of the ground to be in a position for dumping. It will have a thin steel wedge for digging and a conveyor belt for dumping the material out of the other side of the robot. Stay tuned for more info!

I believe it was 100:1 if I'm remembering correctly

Our shots do tend to drift to the side a bit, it's not too bad but I would probably recommend using two shooter wheels to counteract spin on the ring versus one like we have here

We built ours with only one and its not powerful enough and it turns too much. How did you get it to drift so little though. Also what motor are you guys using

@@Sokara7 We used a NEO motor for our shooter, I believe with a 1:1 gear ratio (no reduction). Although, I would probably recommend having two shooter wheels, one on each side, each powered by a NEO (or similar) motor

@@isopod00 We also use a 1:1 NEO and we are currently reworking the shooter to fit a second wheel since with only one the note drifted and didn't go far enough.

We used Andymark's Climber in a Box (cut shorter) COTS solution for our climber, and we powered it using a 775pro motor!

you can apply to the University of Minnesota and help out the team

there are quite a few improvements I can see right off the top: 1 improve climber, it was put on during the last hour and is not optimized, it needs counter weight due to its positioning, and the travel distance should be tweaked, 2 the flywheel made the note spin off to the side, so some way to center the shot would be ideal (add a second wheel either on the other side, or like the kit of parts bot), 3 make the pneumatic ramp also function as a player station intake, 4 add another row of rollers to intake so it can intake from both directions (explained better in another comment)

truth

We never tested this however I see two outcomes: it just gets pushed and it just stays under the bot, or the bottom intake wheel (two inch compliant) would pull it under the bot (could damage the element) spitting it out in front where we could intake it normally. The main shooter plate extends down to almost touch that bottom row of wheels so there wouldn't be any way (without modification) that it could intake from that direction, that said by adding another row of rollers (mirror the top row of intake wheels) it may become possible to intake from both directions

@@jaredschultz1867 If when it spits it out in front, depending on lots of factors (e.g. speed of surface of the wheels -- smaller wheels should be going slower then surface of larger/higher wheels -- and how grippy they are relative to the carpet, and how fast the robot is going), it seems if the larger/higher wheels grab it, it may just get picked up, which would be super cool and useful.

Top of bumpers can be 7.5 inches off the ground, bumpers can be a minimum of 5 inches. That gives you 2.5 inch clearance for a 2 inch game piece.

​@@ashtondemmer8820 Awesome, thanks for the answer!

Additionally, that 5 inches has an acceptable variance of +/- 1/2 inch. So you could realistically go with 4.625" bumpers and be safe. ​@@ashtondemmer8820

The rules say +/- 0.5 inches for bumpers, so you could get 3in of room

SKI U MAHHH RAHHHHHHHHHHHHH

i second this!!! i wanna see how it works

Hey Nathan! We have tried with bumpers and it works very well, the rules have it’s bumpers maximum height flush to the perimeter, and we found that it doesn’t interfere in negative way with the intake system!

@@itsmemarkee6591 thank you so much!! I’m so proud of how far you have gotten. This video has been very helpful to the team!!

they must be kept within 7.5 inches of the ground, and they can be as small as 4.5 inches wide. 3 inch gap, 2 inch notes. it'll fit

We tested it with bumpers and it fit!

We are keeping our bumpers flesh with the bottom of our frame which allows for the note to pass with plenty of room.

Looking at rule r402, bumpers must stay low. Not sure how to read this rule? I think your design will fit into this definition, i hope

Definitely test this with bumbers and verify that it doesn't get stuck

Bumpers must stay within the bumper zone (from the floor to a plane 7.5in above the floor) and must be 5in tall. That means you can get them 2.5in off the floor, for 0.5in of clearance.

@@FLL9909 We have tested with holdng our bumpers up to our bot. One thing to also note is that we have wheels with a 8 in diameter which gives us a bit more height off the ground

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