Learn Python for Mindstorms (LEGO 51515) Part 6: Accurate Turns with Functions

[@keanorobotics9219]

Hi Garry, i've been a long time Mindstorms enthusiast and i'm just starting to learn to code the Robot Inventor in Python and I find your tutorial videos super easy to follow and understand. Your teaching is clear and concise. Thanks for the amazing videos

[@CreatorAcademyAustralia]

Thank you so much for your feedback. Glad you enjoyed the videos! Garry.

[@almahanadalmahdhour551]

This channel is so underrated. Thanks for the amazing video!

[@CreatorAcademyAustralia]

Thanks so much for your support! Garry

[@svizztech]

Thanks again for this video. Keep it up. Great series.

[@CreatorAcademyAustralia]

Glad you enjoy it! Garry

[@aurel7817]

Hi! thank you for your video. My robot turn but doesnt stop..and I use the same code as you. What can be the problem? Thank you for you work! Aurelien

[@CreatorAcademyAustralia]

Hi! check the directions of your’greater than’ symbol, and ensure you are resetting the gyro to zero. Also try moving your robot around to make sure the yaw angles are changing. Garry

[@lisashvids]

Hi Garry a genric question. we dont get the smart prompt when we start to type as you got. it was coming earlier but all of a sudden we dont see the prompt so now I have to type the whole words while coding which takes more time :)

[@CreatorAcademyAustralia]

Hi! I hear a lot of people having this problem but I don’t know what it could be and I’ve asked LEGO for support. I suggest trying to reach out to LEGO as well so that they know more people have this problem. Garry

[@lisashvids]

@@CreatorAcademyAustralia will do thank you. your videos are good and we start to follow on Python coding

[@bernardpage4639]

How do I get Tricky to turn left instead of right

[@CreatorAcademyAustralia]

Hi Bernard, to turn left, we set the 'steering' parameter on the start() method to a negative number. So it is start(-100) to make a sharp left turn. You'll also need to adjust the while loop so that it is checking if the angle is larger than a negative number, or it won't work. Let me know if you managed to solve it! Garry

[@iwishicouldcode]

You can use the following function (pass a negative value for a left turn or a positive value for a right turn): def custom_turn(angle): hub.motion_sensor.reset_yaw_angle() if angle>=0: while hub.motion_sensor.get_yaw_angle()angle: wheels.start(-100) wheels.stop()

[@lisashvids]

def left_turn(): hub.motion_sensor.reset_yaw_angle() while hub.motion_sensor.get_yaw_angle()>-89: wheels.start(-100) wheels.stop()

[@legohouse3422]

❤😊❤

[@einniemand8007]

Thanks for this interesting lesson. When I use yaw angle I get an offset of the angle after the turn using robot inventor. Do you realise the same effect? So if I turn back to yaw = 0 the robots direction is totaly different from it’s original one. Do you have any idea what I am doing wrong? Thank you a lot for any advice. Best regards Chris

[@CreatorAcademyAustralia]

Hi! Is the offset really big? It could be that motor speed is too high and the robot isn’t stopping in time. Garry

[@almahanadalmahdhour551]

@@CreatorAcademyAustralia I have the same issue

[@almahanadalmahdhour551]

Have you solved it ?

[@CreatorAcademyAustralia]

Hi! be sure to use the gyro reset command before running the turn, and keep thw move speed slow. Hope that helps! Garry

[@almahanadalmahdhour551]

So I have found the solution to this you could make while hub.motion_sensor.get_yaw_angle()< 88: since there is a glitch in the software that is not letting gyro to work accurately. LEGO is aware of the problem and they are working on fixing it.