DriverBase detecting motors in a twisted way (SPIKE PRIME, ADB)

[afarago]

Hi,
Sorry for the dummy question - I managed to install pybricks on SPIKE PRIME via https://beta.pybricks.com/.
Adding code via https://code.pybricks.com/ works fine, connection via BT is perfect.

When I instantiate a DriveBase for Advanced Driving Base core model straight startes to turn, while turn goes straight - as if either A or E motor would be in opposite direction.

left_motor = Motor(Port.A) 
right_motor = Motor(Port.E) 
robot = DriveBase(left_motor, right_motor, wheel_diameter=88, axle_track=145)
robot.straight(100)
#robot.turn(90)

Any hints for me?

[dlech]

Hi Attila! You will need to change the direction of one of the motors so that the positive direction of each motor matches how the motors are mounted on your drive base.

# for example
left_motor = Motor(Port.A, positive_direction=Direction.COUNTERCLOCKWISE) 

See docs for the default positive motor rotations.

[afarago]

Hi David!
Perfect - for some reason I was looking in the DriveBase docu for some control parameter, but have not assumed the solution to be found around the individual motor initialization. Many thanks for your valuable help.

For the record - this is the setting for the advanced driving base that worked for me

hub = PrimeHub()
left_motor = Motor(Port.A, positive_direction=Direction.COUNTERCLOCKWISE) 
right_motor = Motor(Port.E) 
robot = DriveBase(left_motor, right_motor, wheel_diameter=88, axle_track=144)

ADB model: https://education.lego.com/en-us/lessons/prime-competition-ready/assembling-an-advanced-driving-base

[laurensvalk]

Glad to hear it worked out @afarago!

How do you like Pybricks so far?

[afarago]

Love it and will coach three girls for WRO open to dive into their project with pybricks in the upcoming 2 months.

Started downloading to build locally - bit struggling, will retry on the weekend as I see big potential in this awesome project.

[laurensvalk]

That's awesome - looking forward to hear about your experience using it.