The Clueless

[@stoven4343]

really great video. i think it's super important that more teams leave behind information about their robotics like you guys

[@velocityspider635]

One of the best informative ftc videos out there. Love ur robot and team and good luck for next season. Software overview ..?? would love to know some of the coding stuff that went into this

[@pjwetherell9414]

We will see about releasing a code overview. If we did, what would you be interested in seeing? Would it be more like general overview of what we're doing with math/logic or line by line explanation of our repository.

[@velocityspider635]

​@@pjwetherell9414 thanks for the reply, I think it would be really useful for teams to see how you controlled the robot, say a general overview of your driver controls (did your turret have preset positions, or did you just use manual control), how you optimized control for the drivers (e.g. everything say intake, transfer, slides in one button). Similarly how did you switch your turret position/intake if you went from running your cycle auto to running shared hub, and ways you thought about optimizing this throughout the season. (or having 2 drivers control duck cycling effectively) with your auto, would love to see how you controlled both your driving/ mechanisms/ generated driving paths (did you use road runner, pure pursuit or something else, computer vision?) or how you angled every time you drove into the warehouse, or using your pressure sensor to detect freight and generate a new path. For your auto specifically, it would be really great to get a more in depth explanation of how you structured your opmode for newer teams, and lines of code you used to control stuff. Also some of the things you guys thought were cool/innovative, or the main things that set your auto apart from others (as well as progression throughout the season) would be great. Basically to answer your question, a bit of both :)

[@cyberknights5568]

Great video! Our future team can definitely use this going forward. Also it's funny to think our team used rev, tetrix, gobilda, and actobotics all on one robot without too much custom 😂

[@yotamdubiner2545]

Awesome video! would appreciate it if you would make a software overview vid too.

[@AXONFN]

that's the coolest robot I've ever seen!

[@techknowlogic3548]

great video! learned a lot. Thank you for sharing!

[@BenCauntyt]

Do you have the cad for your 3d printed slide / pulley mounts shown at 34:29 ?

[@theclueless11212]

yeah, I mean.. it's rather boring lol. if u DM Michael from 11212 on Discord I can send it to u tho

[@need2know00]

Very nice design! I have a young group that is just starting out. The biggest problem they have is not knowing how to build their ideas. Are there places to go for them to learn how to build things such as linear slides, turrets, etc.? They tried making a slide, but it was large and heavy, and it had a tendency to get jammed.

[@theclueless11212]

The FTC discord and reddit are good places to ask questions. Otherwise, I learned an incredible amount from talking to the good local teams (and taking notes) and by watching robot reveals or videos like this in slow motion. There's not a whole lot we don't say about this robot (mechanically) in this video.

[@fasvi1285]

Really great video. Awesome robot.

[@garagesquadrobotics7476]

Great video! It was a pleasure watching you at World’s. What were you using to stop the linear slides going out and returning?

[@theclueless11212]

what do you mean by "stop the linear slides"?

[@garagesquadrobotics7476]

When your slides extended, what did you use to stop them at the same distance (or close to the same distance) every time - were you using motor encoders or switches or some other method? Very curious especially with the speed of your slides. Thx.

[@theclueless11212]

@@garagesquadrobotics7476 just the motor encoders! and a very optimized gear ratio, well-greased slides, fast loop speeds, and a well-tuned controller.

[@garagesquadrobotics7476]

With the slides running so fast, did you have much error in their position over a match?

[@theclueless11212]

@@garagesquadrobotics7476 no; we had no mechanism to reset the slides, just relied on encoders, which I don't think really drift (at leat over 2.5 min).

[@lazy_prerfectionist1042]

Great design! Could I ask what is the teeth count on the bottom pulley for the turret?

[@calmcreeper1542]

Your linear slide the string is attached the other way is their a reason for that?

[@bobmarly2302]

Do you guys have cad for your 3d printed turret pulley you can share?

[@theclueless11212]

we could share cad, but we think it'd be much more useful to give the resources to learn how to recreate it. you can: google "htd 5m pulley traceparts" and they provide free CAD files for pulleys. alternatively, use this tutorial to generate even more custom teeth counts: www.instructables.com/Design-a-Parametric-Pulley-DXF-STL/

[@xavaxo0oj209]

where did you buy that elastic servo extension?

[@jinanfathallah6359]

Hi team I wanna know what slide do you use?

[@FIRST-Lessons]

Where did you get the spring-like cable management device for your slides?

[@theclueless11212]

called a "coil cable". For FTC-legal coil cables that can power servos, you need the wires in the cable to be at least 22 AWG thick (24AWG is commonly found in coil cables but is too thin and is considered unsafe). There are specific dealers for coil cables you can find online like this: www.coilcablespecialist.com/22-awg-3-conductors-electronic-shielded-coil-cable-2203em0s.html

[@BoyuanJia]

what type of string did you use？

[@Rampio-yj7mk]

What specific bearings did you use for the bearing stack?

[@theclueless11212]

just radial bearings from amazon. the top/bottom bearings are 1/4 ID 1/2 OD. The middle bearings are 1/4 ID and 3/8 OD (and 3/16 width).

[@Rampio-yj7mk]

@@theclueless11212 no need for thrust bearings?

[@theclueless11212]

@@Rampio-yj7mk nope

[@bhavlamba6458]

You guys mentioned you wouldn't use the bevel gears if you were to do it again, with this same robot is there another way you would suggest mounting the motor?

[@theclueless11212]

not sure tbh; possibly could have mounted it vertically if it were in the middle of the turret, but obviously a lot of other things would have to change then. we also thought about trying out rev's 90 degree gear box but not sure if that would be better.

[@fasvi1285]

I have a question about the coil cable that you use to power to the servos on the end of your arm. What type of coil cable are you using? Did you run into any issues powering your servos with such a long cable?

[@theclueless11212]

It's just a 22AWG 9-wire coil cable. we had some issues with intermittent power loss early in the season, but we just cut the cable in half and it seemed to fix itself. No issues after that

[@fasvi1285]

@@theclueless11212 We had similar intermittent power losses as well. A coach at MTI explained that despite the low resistance of the wires, the greater the length of the wires, the greater the inductance. This higher inductance causes the voltage to rise more slowly when first applied and so causes issues with the servos. If you look at our robot (Wolfpack) you will see that we faced pretty much the same wiring issues. I particularly enjoyed your video because you made choices that we quite similar to ours, such as the long linear slides and the attempt to score ducks during endgame. Congrats on a great season. Your robot is excellent.

[@theclueless11212]

@@fasvi1285 thanks for the explanation, makes a lot of sense! big fan of yours as well (eagerly awaiting your FF robot explanation 🤔)

[@fasvi1285]

@@theclueless11212 I know that they just put up the video on the Ultimate Goal robot. I will ask Owen and Chris if they can also make one on the Freight Frenzy bot. I know they have several videos they want to make this summer.

[@TY_LR]

How did you create your large turret pulley? Did you guys CAD it or get a file from goBILDA?

[@theclueless11212]

google "htd 5m pulley traceparts" and they provide free CAD files for pulleys. alternatively, use this to generate even more custom teeth counts: www.instructables.com/Design-a-Parametric-Pulley-DXF-STL/

[@sawyerjs]

Hey my team that I am on has been thinking about using Ultrasonic sensors this year. What are the sensors that you'll are using?

[@theclueless11212]

MB1030 LV-MaxSonar-EZ3

[@techknowlogic3548]

can you share the code for the ultrasonic sensor and the wiring diagram.

[@theclueless11212]

it's just a digital sensor from maxbotix (MB1030 LV-MaxSonar-EZ3). it can be coded as any digital sensor is coded.

[@dancingcactus4409]

what kind of gobuilda motors did you use on your slide

[@theclueless11212]

2x 5.2:1 gobilda yellowjacket motors

[@sidcalidas8349]

What is the gear ratio on the motors you used for your slides? They mad fast lol

[@theclueless11212]

2x 5.2:1 gobilda motors, geared something like 2:3 for torque (dont remember exactly). I don't know the spool size by memory either.

[@sidcalidas8349]

@@theclueless11212 thanks!

[@Kimiman-nc3qk]

@@theclueless11212 that 1150 rpm motors right? dont they get really hot?

[@theclueless11212]

@@Kimiman-nc3qk motors generally only get hot if you stall them for long periods of time (stalling when they draw the most current). We do not stall them.

[@quarfg]

what pressure sensors are yall using?

[@pjwetherell9414]

The FSR we use is: www.amazon.com/dp/B00SK694YE?psc=1&smid=A2GTSJRNFEVVSP&ref_=chk_typ_imgToDp . Make sure you follow the correct wiring (with a resistor) because you have to solder this yourself and they burn fast. We recommend soldering to the same connector as a servo so you can easily change wire lengths/plug and unplug when replacing.

[@fasvi1285]

What is the resistance of the resistor that you solder in series with the sensor? Also, do you have any specific resources you look at when thinking about using analogue sensors like these in FTC? In other words and guides to their correct use with the Rev control hub?

[@pjwetherell9414]

@@fasvi1285 I don't know resistance but we just look up analog ______ and find a sensor. Analog is great because you just match up the 3 correct wires and it works. You may have to do experiment to find the conversion between voltage and real world condition of a sensor, but this is the same as using most sensors.

[@pjwetherell9414]

5k

[@fasvi1285]

@@pjwetherell9414 Super helpful. Thanks.

[@laurenchiang]

how does 23:45 work

[@theclueless11212]

yes

[@c3mom28]

noice

[@d1joshy]

w

[@maxren1329]

ｐｒｏｍｏｓｍ

[@jinanft7564]

Greate video 🤍 I learned a lot