"Perfect" Turns: Turning by the Gyro - FIRST LEGO League (FLL) SPIKE Prime + EV3 RePlay Programming

[@finimcglinchey5813]

Great video! I appreciate your adding a way to dial in a turn. For those whose counter rotate turn (the turn here) still does not work, try adding a "wait" quarter-second, after the "set yaw to 0" before the "start moving for" block. It seems to slow the program down and give the Gyro a chance to take a measurement. We are experimenting with how short a time the gyro needs, but .25 works.

[@singlegoaltv3720]

I have the same results, though I omitted the second block in your function. I simply used movements on both wheels with respective speeds. I didn’t use the math block you suggested but it works fine. Thanks you soo much😊

[@coachkc2565]

Sweet!!!! This is SO much easier than what I was doing using greater than or less than! Can’t wait to play with it and teach the kids! Thanks!!!!

[@ZacharyTrautwein]

No problem, KC!!!

[@priyanka2309]

This my first time FLL with spike prime, you are wealth of resource, do you take online classes?

[@rays_robotics374]

Interesting. I believe you need to add that this will not work for turns greater than 180 as the gyro normalizes the yaw angle (angle is between -179 and 180).

[@willisbeaumont6149]

For turns greater then 180 degrees you can use the negative turn to go in the other direction still giving you a full 360 degree area like you stated the gyro knows 180 to -179

[@HexhamFoodCo]

Nice introduction, we do not have prime sets yet. The sensors on prime seem far better. My teams had to develop elaborate software to accelerate and decelerate to a turn then have an extra feedback loop to add a correction in reverse in case it accidentally overshot. It all worked well but when compiling the software in a program scheduler often scrambled the ev3 brain

[@ZacharyTrautwein]

Ah, yeah the gyro improved quite a bit in the SPIKE. Clever solution, though, with the EV3’s!

[@davidpaulsen1510]

Paul we had the same problem 1 make sure you are running educational software or "public software" on the brick and program ,the two are not compatible. 2)check to see if your block programs are on your program,we had this problem pop up when exporting programs between computers.3) don't mess with an EV3 while it's still in boot mode( red light)wait for chime we've locked bricks doing this .

[@steelyray]

So I've discovered that the yaw sensors for these hubs are just not that great sometimes. If you rotate the hub 360 degrees and align it back to where you start, the yaw can be off by as much as 10 degrees for some units.

[@robertcameronjones]

This was a huge problem on EV3. I have seen Spike primes performing quite well, without much drift.

[@gilkalbfeld1384]

Can you please make a build video of the bench attachments

[@ciaranmcdonagh1630]

In the case of the mindstorms ev3, is there an equivalent command in scratch to set the yaw angle of the gyroscope to zero degrees. In the case of the mindstorms ev3, how do you get the scratch commands in green that you used to set the robot to turn by 90 degrees or whatever angle that you set.

[@davidjambrina9757]

Thanks a million for al your videos and advices. All of them have been really useful for me and my team. We have learnt a lot from you. Thanks again for sharing your knowledge.

[@ZacharyTrautwein]

You’re so welcome!

[@markhartman3786]

Saw an interesting change in performance of the turn by gyro code based on running code in streaming mode Vs download mode. We are using advanced base and saw the offset needed to be 13 degrees when streaming and 4 degrees when downloaded. Speculating the rate at which yaw is sampled or the rate of executing the stop movement is the source of difference. Have you seen this change in behavior?

[@theonidimopoulou7514]

Hello from Greece. I copied your program and actually did everything you did but the robot ignored it and didn't make a turn at all! Any ideas what the problem could be?

[@pequodexpress]

Has a third party made an improved gyro sensor for the EV3?

[@dskddmdlim1316]

Thanks for the code, it has been very helpful! I have 2 questions though; don't we have to do a set movement motors to port x+y in the beginning so that we can identify which motors will be used to execute the code? Also, will the equation be more accurate if we use "wait until abs of yaw angle = abs of degrees", so that we can achieve the exact degreed of rotation?

[@steelyray]

With as slow as the processor is sampling, it may miss the exact equal number and then never stop. Using > is better.

[@gilkalbfeld1384]

this is a great video

[@ZacharyTrautwein]

Thanks!

[@pcshopny]

Tried this but did not work for me. Turn 45 goes to 90. Any reason why??

[@danc1512]

Thank you, thank you from this coach. My son enjoys your teaching style. Our Spike needed a set movement motors due to multiple motors. Could you suggest a means to tighten the myblock? Looking forward to tackling acceleration next. Thanks Zachary.

[@ZacharyTrautwein]

Sorry, not sure if I understand....Do you mean tighten the turn?

[@danc1512]

@@ZacharyTrautwein We used TurnByDegress of 90%. Out bot seems to be constantly off by 12% requiring an input of 78% to complete a 90 degree turn. Is there a means to reduce or fine tune % difference? We confirmed the yaw was 0% at the start. Our code is identical to your example with the exception of adding a set motor movement block. Thanks you for the great lessons.

[@ZacharyTrautwein]

Dan C interesting! My first question would be is the hub firmware updated. If so, maybe a factory reset of the hub would fix it?

[@pequodexpress]

Is this software Scratch, or is it another language made to look like Scratch? I've seen others refer to this platform as MicroPython, which I thought was more conventional line coding.

[@nicecool123]

no is it spike lego education

[@markbowen4728]

Awesome Gyro turn code - - Thanks!! I've got a continuing problem with my Spike Prime App. It is refusing to open most of my projects now.. When I click on one of my prewritten projects I get the following popup: "Heads Up - Could not open project" At this point it appears that project can never be opened again. All my existing Projects are involved. The projects are written in Spike Prime Word Blocks code. My OS is Windows 10. My version of the Spike App was downloaded only about a month ago. Any idea what is causing this and how to avoid this problem?

[@TeamPhoenix-v4t]

Amazing video! I appreciate you spending time on this video, but I find something unclear. What is in that box at the very end in the "wait until"? We are trying gyro now and it's kind of unclear.

[@TeamPhoenix-v4t]

like what symbol is that and how do you get it?

[@TeamPhoenix-v4t]

everything is just very blurry.

[@robinlthornton2077]

Hi what video editing software do you use for managing the camera angles and overlaying for the video?

[@ZacharyTrautwein]

Hi! I use Final Cut Pro, and QuickTime to record me computer screen.

[@BehindtheCache]

How did you make the block that has the oval degrees ? Example (start movement at 10* degrees/abs of degrees) how did you get the degrees. I made the rest of the code but that part isn’t working. Please help

[@ZacharyTrautwein]

Hi! When you make the “my block” you need to add an input to it 👍🏻

[@BehindtheCache]

@@ZacharyTrautwein thank you I did do it correctly. I was not doing this on the FLL mat and I had to increase the move from 10 and -10 to 20 or higher to get it to turn. I noticed it was trying to turn but wasn’t. I heard a high pitched noice. Thanks for the videos it is helping us get up to speed for this years FLL that my kids are in This is our first year.

[@ZacharyTrautwein]

@@BehindtheCache my pleasure!!

[@ZacharyTrautwein]

I think I may have miss understood your question... when you create the function with the input “degrees” you can drag that degrees down out of the large level red function block.

[@BehindtheCache]

@@ZacharyTrautwein thanks yeah I figured that out by accident. It was more of not giving the motors the power to get them to move. Can’t wait to see more of your videos. Wish my kids had a STEM teacher like you.

[@8520amos]

the line that states at start moving at...

[@КатеринаГунчак-с1р]

thank you very much

[@NikkiandAndyBell]

This is so helpful!

[@ZacharyTrautwein]

Great to hear!!

[@rammaddirala6857]

Hello Mr.Zach We were able get to the state level tournament because of the tips you gave us. Where do you get that adapter to put the wait until

[@rammaddirala6857]

Or what I actually meant was how do you put the circular block that says abs of yaw * abs of degrees in the wait until block

[@rammaddirala6857]

No need sir I found out how I need to do it

[@ZacharyTrautwein]

Hey! That’s AWESOME!!! Good luck at the state championship!! What state?

[@rammaddirala6857]

@@ZacharyTrautwein Minnesota : )

[@ZacharyTrautwein]

Fantastic!!

[@8520amos]

Hi can you explain more about the cod

[@ginarauscher7874]

Great video, it was very helpful. We are trying to build the code but we don't seem to have the same starting movement code as you have on your screen. My daughter and I were able to build the operating code but we can't find movement code to drop in to operating codes. Our closest movement block reads" Set Movement Speed (Blank) %. Where as the one you show is Start Moving at (blank) % of Speed. Any suggestions where to find the same code as you have or create it? Thank you!

[@willisbeaumont6149]

When in the spike prime coding interface, in the bottom left there should be a icon with two blocks and a plus sign. If you click that it will show some extension blocks and in that screen there should be one called more movement. Then just click the little white circle in the top right of that icon to add it and it should then be added to your block list. I'm not sure how helpful this will be as it is 8 months later but hope it helps (:

[@steelyray]

Is there a way to do this without resetting the yaw to 0 for every turn and keep the code fairly clean?

[@ZacharyTrautwein]

Hi! So, using the “My Block” function allows you to only reset the Yaw on time the entire code. Each time you turn you just drag out the red block you created and then insert the degrees you want to turn and you’re good! No need for the code to be messy!

[@steelyray]

@@ZacharyTrautwein No, I get that. I just don't want to keep accumulating small errors by having it reset each turn and instead would want it to reset only once at the beginning. I hope that makes sense?

[@satyamappadwedula5007]

Thanks for your videos. Really cool. It seems like my kids are having issues with missing turns. First TurnByGyro works. Then if we have a drive straight or something and another TurnByGyro, then straight again, it seems like its doing a turn, straight and straight again instead of turning between straight moves. Any idea why this might be happening? Hope we get a response asap. Also how do we turn at faster speed?

[@willisbeaumont6149]

Hey I am very unqualified to try to help with this as I am a competitor who has never attempted this code before but maybe adding a pause between set yaw to 0 and start moving at could give the gyro time to calibrate and make the second turn and as for speed I honestly have no clue since i've never tried it before but maybe trial and error with the start move percentage with 10 and -10 you could try different ratios like 15 and -15 P.S. I hope this helps but again I am unsure and just trying my best while not having access to my spike prime

[@Fungames91Official]

anyone find this a reference to scratch?

[@meestermichiel4614]

Thanks for this very informative video! I made the code like you showed in this video. Also made the block turnbygyro en added an input called Degrees. But nothing really happens? Do i have to specify somewhere what degrees means in relation to the gyro/yawn? I feel like I'm missing something... Hoping for an anwer :-) Greeting!

[@meestermichiel4614]

Ow it worked, no need for an anwser! hehe

[@ZacharyTrautwein]

Good!!! Glad to hear it!

[@usamealtntas7983]

How did you solve the problem?

[@razerclaww7210]

Hey I have a question. Will the Yaw be different from time to time, if you choose to have your robot start different places each time you do a mission. Lets say one time I do the bench mission, and then the next step counter, will they yaw be different, because of the start placement? Hope it makes sense.

[@razerclaww7210]

What I am meaning, do I need to have two different myblocks for the start placement.

[@ZacharyTrautwein]

Great question. Nope you don’t. In the actual “my block” code the yaw resets before the robot ever starts to turn.

[@razerclaww7210]

@@ZacharyTrautwein ohh okay i didn't notice that, thanks.

[@homer5570]

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[@IvanRamirez-fx5zi]

New to FLL. How do you add the red degrees inside green operator?Thanks.

[@ZacharyTrautwein]

Hi! You just drag it from where it says “degrees” in the large red block at the top. Just click and drag it down!

[@carrinebuitrago7037]

Did you ever figure this out, I read his response and still don't see it.

[@georgekatsanis1042]

My hub gyro has inconsistent transitions from positive to negative yaw angle output. It sometimes flips yaw polarity at 180, as it should. But sometimes it switches at random angles, for example 0 to 220 then -140 to 0. Next it might be 0 to 30 then -330 to 0. The erratic gyro yaw output makes yaw turn control unreliable. Any tips for correcting this?

[@ZacharyTrautwein]

My first question would be is your hub up to date?

[@timdunnink9089]

What program did you use for this?

[@ZacharyTrautwein]

Hi! I used LEGO EDUCATION’s SPIKE Prime programming environment.

[@raghadal_khateeb4732]

Why can't I work on the old software? !! I do not like this software, just as the previous software is more practical for the EV3 .. Please answer me because I am in trouble!!

[@ZacharyTrautwein]

Unfortunately, the old EV3 software is no longer supported.

[@raghadal_khateeb4732]

@@ZacharyTrautwein What bad luck !! I got ready during the summer vacation and managed it a lot ... I did not like the new program and it is not practical like the old .. I do not know what to do, but it remains for you to provide us with information about it !! ..

[@razerclaww7210]

Again quick question, where do I find the red "Degrees" that is the in green area, I can't seem to find it.

[@ZacharyTrautwein]

You have to click and drag the "degrees" from the large My Block at the top of that specific script.

[@carrinebuitrago7037]

Did you ever figure this out? I can't find it either.

[@carrinebuitrago7037]

I finally figured it out. You have to create the degrees button when you click on make a block, then you click on add an input and type in degrees. This allows you to drag it down into your code.

[@angiemelville2823]

How do you make the my block appear in every project? Do you have to copy the program for every project?

[@ZacharyTrautwein]

Ah, great question!!! So I should make a video about this! However, what I’ve been doing is I made one project with the MyBlock and line following code in it and saved it as “Skeleton Code”. Every time I or my students start a new project, Instead of clicking the plus sign we: -go to file > open - find the skeleton code in the document folder (or wherever it is saved) - right click and duplicated - then open the copy, - rename it and code on it! Does that make sense?

[@angiemelville2823]

Thank you! - from FLL Team Apollo, NSW Australia

[@kenolsson4273]

Hi can you explain how it moves without a set movement? speed

[@ZacharyTrautwein]

Not sure what you mean...?

[@kwilesvolleyball2028]

i think the set movement is one rotation at the beginning

[@vesrola]

mivi pat your head

[@sondrejakobsen7640]

Can u make it downloadable

[@ZacharyTrautwein]

I do not think that I will....BUT.... watch out for a FLL Hacks video on Friday. In that video I'll show you how you only have to make in once!!! (along with some other cool stuff)

[@Kevin-vk4fz]

hi

[@ruanroy5586]

FIRST!!!

[@mail2jaincharu]

you are scamming