FTC Robotics Team 24431 Sedona Scorpions

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Founded in 2023, the Scorpions provide a safe space where teens can learn about STEM and robotics, gain team and leadership skills, and compete with other teams in the international FTC league of robotics teams.

As expected, FTC Robotics Season 2025/26 “Decode” came to an end for our team yesterday at our Arizona State Championshi...
02/22/2026

As expected, FTC Robotics Season 2025/26 “Decode” came to an end for our team yesterday at our Arizona State Championships. We came in as 20th out of 25 in our division, narrowly meeting our revised goal of not finishing last. Despite some avoidable mishaps, and despite one cannon being held only by zip ties and duct tape at the end, I actually think of yesterday as the team’s best showing of the season.

There were a few things we didn’t manage - our autonomous program only ever “sort of" worked, with some failure modes still unexplained, and in January we had to realize that building an intake was too big a task to bite off - but these mostly seventh-graders have come quite far. A selection of things they/we learned this season:

Nuts and bolts, wheels and hubs and axles
“Lefty loose, righty tighty”
Force and torque, and how to trade speed for torque
The appropriate tools - nut drivers, Allen keys, Dremels, 3D printing
The robot components - DC motors, servos, cameras, odometry pods
Making a cannon out of PVC pipe and compliant (i.e. soft) wheels
Control loops and PIDF
Optical odometry (and when it fails)
The rules of robot construction
The rules of the “Decode” game
How to operate the robot to play the game
How matches work
How tournaments work
How the state championship works
Fundraising
Gracious Professionalism

It’s the kind of list that, if you hold it up in front of students at the beginning of the season, they would doubt they could ever comprehend. Yet learn they did, and mostly they had fun doing it! They will forget some of it, that’s ok, they will learn it again next year.

The kids had a goal of making it to State, and we accomplished that. A combination of luck (3 high-performing teams from Mexico coming to our first competition, winning all, teaming with us often, picking us for the play-offs, and then not needing advancement slots) and strategy (show up with a working mechanism and autonomous routine early) made that possible. It’s a fine goal to have every year, but I’ll modify it to say “deserve to be at State every season”. Next year will be a bit harder as I will step back a bit and have the students do more design work - their own 3D-printed parts etc. And in general, we need to have a conversation of appropriate expectations - to be a competitive team in our region, students need to both spend more time and use it more wisely. We will reject goals that are not in line with the effort the students commit to. These kids are technically too young for FTC robotics - we acknowledged that from the start - and we want to make sure they grow into it at a pace at which they (and their parents!) are comfortable. It’s a fine thing to continue as we did, with modest time budget, but it will not be competitive.

Now we get to make some decisions - who is committed to being around next year? Does it make sense to transform our 501(c)(7) into a 501(c)(3)? Do we want to have a post-season? Where would we meet? Can we afford to rent space?

We will meet with the students again on Monday March 2nd to conduct a proper postmortem review of our season and see where their heads are at. And to dismantle the field and give our co-coach Priscilla her garage back.

I want to close by saying a heart-felt “Thank you!” to all parents, grand-parents, step-parents, everybody who helped and cheered and transported, our generous sponsors, and especially my co-coach Ms. Priscilla who is new to both competitive robotics and herding 7th-graders, but still offered up her time, her home and her garage to a hyperactive bunch of middle-schoolers, so we could have a field. None of this would have been possible without all of you.

I hope we will look back on this in a decade and realize it was the kernel of a new wave of STEM education in Sedona.

Gunnar Mein
Head Coach
FTC Team 24431 Sedona Scorpions

It's almost time for the AZ State Championship in Flagstaff! We are a little lucky to be there, to be honest. But that's...
02/17/2026

It's almost time for the AZ State Championship in Flagstaff! We are a little lucky to be there, to be honest. But that's ok, in FTC robotics you take the good luck with the bad. After our second tournament, we installed a second shooter wheel in each cannon, to get a better grip on the whiffle ball. After our third tournament, we decided to go to controlling the speed of the cannon wheels rather than the power input. That meant learning about control loops and PIDF, a tall order for 7th- and 8th-graders, some of who don't know what a function is yet. But we are muddling through. Lastly, we added a little auto-aiming with the camera every time we take a shot. That doesn't completely work yet, but we are hopeful for our last practice session tomorrow.

State is (edited) Friday and Saturday. Our goal is to play well, to the limit of our abilities, and avoid a DFL! Wish us luck.

After this, we will have a post-mortem meeting, do some cleanup, and give Ms. Priscilla her garage back. Then we are going into post-season. We need to find a space to practice - looking for about 700 sqft that we could rent for maybe $5000 a year. And converting to a 501(c)(3) might be helpful for grants.

If you want to follow us on Saturday, here are the streaming links. Look for team 24431. No, I don't know yet which division we are in, you might have to check both streams.

https://youtu.be/WIFNDohoTKs
https://youtu.be/wMIz4cTjXSk

2026 FIRST Tech Challenge Arizona State Championship Grand Canyon Division at Northern Arizona University

The current haul of 3 seasons. Will need to find more room.
11/23/2025

The current haul of 3 seasons. Will need to find more room.

11/23/2025

The second tournament was tough for us. We did everything we wanted to improve last week - fixed motor mounts, fixed autonomous base routines. On Friday, on our own practice field, autonomous was working great.

Nothing worked on Saturday morning - the SparkFun OTOS reported moving hardly at all, when in reality we had traveled 8 feet. We swapped the cable, swapped the sensor, things seemed to “sort of work” with large correction factors - but we never got it working. So all day, our autonomous routine was “drive 2 seconds to move off the line”. We had ditched the motor encoder cables a while ago, no backup there.

To add to our troubles, our cannons later in the day were so inconsistent it would be funny if it weren’t so sad. First shot would go long, second shot pitifully short, third shot long again - too hard to dial in. In our last match, we scored 1 out of 10 shots.

We did play in the playoffs again - not entirely undeserved as we did ok the first 4 matches, and were paired with great partners, ending up in 6th place. We didn’t move up to be captains, but the 5th place team did - a 1st-year pushbot that had been paired with the strongest teams all day. Of course, we got blown off the field in our 2 playoff matches, by scoring proportions of 10 to 1. Good fun (no really, we were just happy to be picked).

We also won the design award again.

This time, we would not have advanced to State. There is a lesson here for us: The smaller (17 teams) tournaments with only 3 advancement slots are tougher to make it through. The top teams were impressive - rapid fire scoring across the field and from all kinds of other legal spots, 3 shots in a second. 15 artifacts scored in autonomous. Patterns were constructed by some, but never well enough coordinated with partners to be perfect. And a single missed shot of course ruins the pattern.

Time for me to have an expectation reset with the team. I thought we would have a fun day were everything worked, not really caring how we compared. Now we need to consider redesigning the cannon - that’s at least a week, but constructing an intake for this cannon is useless - and figuring out what to do about odometry - encoder driving won’t be well enough to pick up extra balls even if we get the intake done. Buying and learning to work with an odometry drag wheel sensor is another bag of fun. Can the SparkFun OTOS be made to work? Based on internet chatter, I now have serious doubts. Really tough to see how we meet our goal of showing up at State and looking like we belong (and avoid a D*L).

What a day we had! Won our practice match and four out of five matches in regulation. Ranked fifth before playoffs. Move...
11/16/2025

What a day we had! Won our practice match and four out of five matches in regulation. Ranked fifth before playoffs. Moved up to be the fourth playoff alliance captain, were invited by the third playoff captain and joined their alliance. Did pretty well in playoffs, considering - made it to match five, losing a chassis motor, playing the next two games with it duct-taped to the chassis because there was not enough time to fix it properly. Accumulated enough ranking points to advance to the State Championship in February as one of the top 3 eligible teams (out of 16 eligible). Learned a ton. Exercised Gracious Professionalism! Made new friends. Had a ton of fun. And we'll do it all again next weekend, except without the pressure of wanting to advance!

Showtime
11/15/2025

Showtime

11/14/2025
That’s our robot. Not everything works how it should, but that’s it.
11/14/2025

That’s our robot. Not everything works how it should, but that’s it.

A lot gone done today - a good thing, because there is not much time left. The second cannon should be easier as we will...
11/08/2025

A lot gone done today - a good thing, because there is not much time left. The second cannon should be easier as we will just mirror the first one. The electronics and battery found their spot. The intake will sadly be decoration for the first tournament - we don’t know whether it works, and if it did, we wouldn’t have a sorter yet to send the balls left or right. For competition 1 and probably 2, the cannons will be front-loaded by the human player with a special mode that spins the flywheel backwards.

So close: Servos didn't quite cut the mustard for our intake, so it's on to dc motors now. The adapter piece for the mou...
11/04/2025

So close: Servos didn't quite cut the mustard for our intake, so it's on to dc motors now. The adapter piece for the mount here doesn't quite fit yet, but a small revision will do the trick. The students also replaced a broken cannon mount, made alternative intake wheels, and started work on the second cannon.

11/02/2025

The flywheel cannon works. Now it needs a firing mechanism.

Address

Sedona, AZ
86336

Telephone

(425)4421467

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