Ri3D Reveal - FTC Relic Recovery - 7182 Mechanical Paradox Cubed

[@robertthibodeau9182]

3:24 what happened to the relic in the background?

[@pancake-th7qy]

That's some good engineering.

[@JD-rh7tw]

Looks AWESOME guys

[@bengrant6478]

My team (Frogbots) have a relic arm very similar to yours, but the x-bars droop and wobble a ton from side to side when turning. How did you manage to make it so stable without two slides for support? Thanks and good luck, hope to see you at Worlds!

[@arpankumar7124]

Love it!!!

[@jason614163]

This robot is amazing.

[@yunggalfirst1891]

Great build plan How do you make and attach the arm to the linear slide

[@yamayuff]

for ur linear slides, how does the string supporting the lift from the servo all the way back to the spool work? Is that a separate string from the string that goes around the bearings?

[@carterstegg]

Are you going to post a video of your competitions? Because I think it would be interesting to see how well it can recover the relic in an actual game with a time limit.

[@MechanicalParadoxCubed]

Carter Steggerda if we do, we will post how it does...

[@frankmartinez4975]

How did y’all make the linear slides go back to unextended

[@jthero24]

hello, I was wondering how did you guys get your arm to stay stable when moving it up and down ?

[@theclueless11212]

jthero24 - four bar. Search it up

[@thecuber4107]

How did u guys get the arm to stay up in that position. The gripper mechanism looks kinda heavy. Great works btw!

[@MechanicalParadoxCubed]

The REV hardware we used manages to stay upright pretty reliably on their own because they have relatively long support pieces in between every stage. In order to retract the slides, however, we did implement a reverse string in addition to the extension string. Since the reverse string connects to the front of the top stage and remains taut throughout the slides' extension, it provides some additional support to the assembly.

[@MechanicalParadoxCubed]

Also, the relic gripper mechanism is fairly heavy because it needed a quarter scale servo to lift the weight. That being said, the slides are able to bear the load, so it all works out pretty well.

[@georgecadiente9362]

Awesome!!

[@zakirjan1121]

Hello guys, how goes you relic arm work? how one pulley can pull back and forward string? thank you

[@theclueless11212]

zokirjon mirzoev - is typical linear slider. Just search up FTC linear slider and plenty of helpful videos should pop up.

[@johnstout751]

zokirjon mirzoev j

[@firstresponders2312]

Hello I am wondering where I could find how to string and 80 20 liner slide that can move in both directions. What we had was a string attached to the end of the liner slide and ran it threw ball bearings and connected that to motor, but this only allowed us to move out the liner slide and never bring it back in. How do we string it so I can move out and in? Thank you for your time.

[@sidb6471]

What wheels are you using???

[@petebourdess6845]

Are you using encoders on any of your motors? If so can you direct us to a link on adding encoders to our blockly program..... pleaae :)

[@MechanicalParadoxCubed]

As for encoders, yes but we use Java not Blocky...recommend you contact Wizards.EXE re Blocky. [e-mail].

[@arkoghosh9357]

How did you prevent the string from wrapping onto itself?

[@arkoghosh9357]

For the relic mechanism.

[@spheal4754]

What kind of string do you use so that it sticks to the rotator

[@MechanicalParadoxCubed]

For the relic arm, we used thin nylon cord on this iteration, but on linear slides from previous seasons we have used kevlar cord as well as fishing line. The trick that we used to attach the draw string to the pulley isn't actually based on the type of cord, though. We drilled a small hole into the side of the wheel, fed the cord through, and screwed in a 6/32 screw into the hole. This causes the screw to dig into both the plastic and the cord, which, in our experience, tends to give a pretty reliable hold.

[@spheal4754]

Thanks

[@danielpiper1675]

How is the REV hardware working for you guys?

[@MechanicalParadoxCubed]

The REV hardware has been working really well! We were impressed that they were able to bear the weight of our mechanism and the relic at the end of a 5 stage linear lift with almost entirely stock parts. Although we have not tested out other slide frameworks for this task yet and are sure that there will be multiple good choices this season, the REV kit is definitely a viable option.

[@bobbob-ke7sk]

What do you use to collect the servo extenders?

[@MechanicalParadoxCubed]

I'm not sure I understand the question. Which servos are you asking about?

[@danielreyna663]

How did you guys keep the Glyph claw to stay in that straight position?

[@MechanicalParadoxCubed]

The mechanism we used is called a parallelogram lift. Instead of having one rotating arm it has two beams that keep the grabber connection perpendicular to the ground by forming a parallelogram. It is a bit more evident what is happening in this video: kzbin.info/www/bejne/e4SmnqGDpcmBZ6c

[@danielreyna663]

Thats an awesome idea! Do you have building specs on that lift?

[@MechanicalParadoxCubed]

As of right now, we don't, but we're trying to push to make publicly available instructions for the main robot . It's a bit tough at the moment as we're in the middle of building our competitive robot as well, but our hope is to release them in the near future.

[@theclueless11212]

its called a 4 bar but ok

[@chrishasel7352]

Its alright

[@NessieAndrew]

But the real question is: Can he do your homework?

[@crisortega8518]

Lol, my team doesn't even have a drivable robot yet.

[@akaOddity]

Cris Ortega haha we just got ours moving

[@crisortega8518]

Oddity Only same, that comment was 1 week old. We might got a drivable robot but it's a mess cause it's a triangle

[@freeshavaacadooo1095]

Lemme guess, a holonomonic drive that's three-wheeled?

[@akaOddity]

Freesh Avaacadooo I would guess the front to be Omni while the back two are just normal. Which wouldn't be holonomic. But that's just guessing..

[@carterstegg]

We just got ours moving last Friday and our competition is this Saturday ;-;

[@DrPhil-sm6ls]

@@@@@@@HOW DO YOU MAKE YOUR ROBOT MOVE?????!!!!@@@@@@@@@@@

[@isabelzhang6950]

bet ur robot can’t open a bottle of beer tho chumps

[@isabelzhang6950]

rt

[@isabelzhang6950]

jk guys nice job hope we don’t ever meet ;_;

[@-bluesharpie-5212]

Oh, it can.

[@elishathomas0244]

Looks like a rip off of team 5044's robot