Hello,

Me and my team are trying to figure out a way to calculate how much power or I guess torque will be needed for the lifting of our robot. We’re using linear slides. Is there an equation that we can use or something like that?

Got a situation. We are currently using an Andymark mecanum chassis with the tip part of the Robits kit for grabbing. We have the chassis connected to the Control Hub and the arm motor is connected to the Expansion Hub. We are experiencing the arm getting hot and not moving as the way it should. Also, the servos, which are connected to the Control Hub act wonky when the arm acts up. Would it be helpful to connect the arm to the Control Hub and move a chassis motor to the Expansion Hub? The current chassis code only has the Right front and back motors in use. Thanks

Before I drop some cash on some things I found on Amazon I wanted to ask here to see if I can get some better insight on what I need to get exactly.

I am running two servos at the same time and wanted both to run at different speeds. It is not for an rc car/plane but for a Xmas window display.

Thanks for your time!

FTC Rookie Rescue is a weekly 45-minute youtube live held every Sunday at 6 PM EST by Don't Blink. Here, rookie teams and individuals can learn all there is to know about FTC and robotics.

Youtube Live Link: https://youtube.com/live/SZIv1k-k1qU?feature=share
Discord Link: https://discord.gg/Jex4kpV8Vq

• Each session is led by members of Don't Blink (FTC #14481) and begins with a 10 minute presentation by team members on different mechanical, programming, or outreach concepts and is followed by an in-depth Q&A period.
• Today's session on 11/3 will focus on Into the Deep Game Strategy

We are currently using a 2 stage, converted into a 3 stage viper slide. We are going to use encoders to put the slide in 3 positions, fully extended, middle, and down. We don’t know where to start to code the encoder. we already have encoder wires btw.

My team's purchasing the parts they need for this season and they decided on Misumi Slides for the bot. We're buying around $270 USD worth of product but Misumi is charging around $280 USD just for shipping. Any teams from Canada have any experience with them? Is there any way to get the shipping costs down?

Hey, a rookie team here We wanna buy a ftc gobilda kit and we wanna know how much it weighs because it’s going to be shipped internationally so we need to know the weight to know how much the shipping cost will be If anyone knows please comment on this post

Can anyone help me figure out where this extrusion lift kit came from? It's off an old Rover ruckus bot, circa 2016. A scrappy rookie team I'm helping is using it, but needs some more hardware.

the federal trade commission that is.

(webhook test post for ftc discord)

I was converting a teleop code into a class w/ method for the first time and I ran into dome errors. the error says that I'm trying to "invoke virtual method" on a "null object reference".

the code that the error is reffering to is: (3rd line here)

public String configureOtos(SparkFunOTOS myOtos) {

    myOtos.setLinearUnit(DistanceUnit.
INCH
);

    myOtos.setAngularUnit(AngleUnit.
DEGREES
);

    SparkFunOTOS.Pose2D offset = new SparkFunOTOS.Pose2D(0, 0, 0);
    myOtos.setOffset(offset);

    myOtos.setLinearScalar(1.0);
    myOtos.setAngularScalar(1.0);

    myOtos.calibrateImu();

    myOtos.resetTracking();

    SparkFunOTOS.Pose2D currentPosition = new SparkFunOTOS.Pose2D(0, 0, 0);
    myOtos.setPosition(currentPosition);

        // Get the hardware and firmware version
    SparkFunOTOS.Version hwVersion = new SparkFunOTOS.Version();
    SparkFunOTOS.Version fwVersion = new SparkFunOTOS.Version();
    myOtos.getVersionInfo(hwVersion, fwVersion);

    return("OTOS configured! \n Hardware version: " + hwVersion.major + hwVersion.minor + "\n" +
            "Firmware Version: " + fwVersion.major + fwVersion.minor);
    }

We had a battery die in the middle of a meet today. The battery was fresh off the charger and registered 13.4v when I measured it with a multi-meter. The WiFi on our control hub dropped and when it reconnected the battery was showing 10.5v.

What is the best way to test the capacity of our batteries?

Hello, I'm the captain of Tesla 15912, this season we want to use a claw, but I can't find any design that I like for this one, does anyone have a stl design that works for into the deep, that works with 1 or 2 servos?

While we did well at our first competition today, the best thing that happened may be learning about the SparkFun OTOS system. I’m about to place an order, but I’m getting thrown by which cable we need. The one recommended on SparkFun’s site is on back order. I can find possible cables at Adafruit, but I can’t make out which type STEMMA connector will work.

Can anyone with an OTOS or with insight share their knowledge?

Our auto currently takes the whole 30 seconds to cycle 3 samples into the high bar and a big part of that is roadrunner trajectory stuff so we are trying to move to pure pursuit based on this article in the docs https://rr.brott.dev/docs/v1-0/guides/path-following/

but we dont fully understand were or how to implement it even after reading the article

I am new to GitHub and Android Studio, I am needing to replace my master branch with another branch (in this case 'Test'. If there are changes in Master ahead of Test I am okay with discarding them. Do I use 'Pull Into Master using Rebase?'

https://preview.redd.it/jxvu4kjvfhyd1.png?width=757&format=png&auto=webp&s=72f625b14491f8c3c5f26157a7b0999bd062763e

We have a problem with retracting the last stage of the viper slides. The spacing between stages is not good, and the belt mashes with itself between stages and causes a lot of friction.

We have built another set. The spacing is just a little bit better but still tight.

We tried tightening the belt, and loosening the screws but it only helped sometimes. The screws are just hand tight now to remove wobbling.

Before we dessaemble the viper slides again and add washers between stages, anyone had this problem and successfully solved it?

Thank you.

Where the belt mashes

Spacing is tight

So our team has been saving every failed print for the last 12 years and subsequently now has a TON of pla. We want to shred this and make things we can use for our team or hand out at events to other teams.

So far our ideas consist of •FTC coins / key chains •Team coins / key chains •Magnetic nut and bolt dishes

We want to know what other teams would think is fun / useful to be given out. Don’t worry about the practicality of manufacturing as long as its primarily plastic

I am new to Android Studio. I created a project and uploaded it to GitHub but it contains a lot of the files that are user/machine specific. Does anyone have an example of the files/paths that should be included in git.ignore? My repo is such a mess LOL

This is my team’s first time using encoders to move our linear slides into preset positions. Does my methodology look okay?

HARDWARE:

1. Attach encoders onto motor & control hub

SOFTWARE:

1. Assign preset encoder position values
2. Stop and Reset encoders
3. Set motors to use encoders
4. Make the motor go to the position based on the encoder position values

Any experienced programmers, advice would be fantastic! Thanks!

Not necessarily the whole field, but at least certain parts.

As it can be seen in the picture, the odometry data does not match up with the trend line, we have checked for slippage and encoder problems.

what is the best app/program to code in FTC roadrunner or basics of java?

I’m new to the blocks programming so I need to know how to duplicate a set of blocks (multiple block lines) versus just a single block line. I haven’t found anything like the standard select top element and shift select bottom element to highlight the entire code block to copy it down. Does this type of super block copy exist?

This is my first year with the FTC competition, and I'm the lead developer for it.

I have gotten roadrunner and everything all setup and working, but the graph on the website dashboard still shows last year's game. How do I update it to match the current game?

Hi! Our team is using the new GoBilda odo computer with the 2 dead wheels and we are wondering how we can use this computer and read data from it. We are trying to go thru the instructions via the page, however, we are using android studio and we are not sure how to integrate the driver into the robot. Anyone have tips on this?

I really wanted to know how I could prepare myself to be a good pilot without having a robot at my disposal does anyone have any tips

can i use rr with a differential swerve? if yes, where can i got any example

Does anyone have experience using servo gearboxes like this? We are using one to control our intake rotation (left, right, center). I have it setup as a Servo on the controller and regardless of the value I use, setPosition behaves the same way and completes a full rotation.

https://preview.redd.it/g8uvvyqto3yd1.jpg?width=800&format=pjpg&auto=webp&s=1c432af0af9c261482bed7ec04a6e5d214572b1e

My team wants to limit the movement of a slide using software limitations(using position will not allow the side to move far enough), we are using an Axon mini+ servo. Is there a way to count encoder clicks for the servo, like motors, and how would you go about programming that? The only thing I've found is plugging in the second wire from the Axon servo into an analog port, but I can't find any documentation on how to do/program that.