Monsterborg motor coasting

Unfortunately the ThunderBorg does not have the capability to allow the motors to coast.

What you can do instead is create a function which will gradually reduce the motor power to nothing. This is gentler on the motors than a hard stop and should cause your MonsterBorg to slow down in a much more controlled fashion.

Here is an example of how this can be done:

# Needed imports
import ThunderBorg
import time

# Function to perform a gentle stopping of the motors
def GentleStopMotors(TB):
    # Settings for the slow down
    stepSize = 0.02     # Power reduction per step 
    delay = 0.01        # Delay in seconds between each reduction
    # Start by getting the current motor power
    speedMotor1 = TB.GetMotor1()
    speedMotor2 = TB.GetMotor2()
    # Determine the direction to change motor power
    if speedMotor1 < 0:
        stepMotor1 = -stepSize
    else:
        stepMotor1 = stepSize
    if speedMotor2 < 0:
        stepMotor2 = -stepSize
    else:
        stepMotor2 = stepSize
    # Step the motors down until they both reach zero
    while (speedMotor1 != 0) and (speedMotor2 != 0):
        # Reduce the values towards zero
        if abs(speedMotor1) > stepSize:
            speedMotor1 -= stepMotor1
        else:
            speedMotor1 = 0
        if abs(speedMotor2) > stepSize:
            speedMotor2 -= stepMotor2
        else:
            speedMotor2 = 0
        # Set the new power levels and wait
        TB.SetMotor1(speedMotor1)
        TB.SetMotor2(speedMotor2)
        time.sleep(delay)

# Example usage
TB = ThunderBorg.ThunderBorg()
TB.Init()

TB.SetMotor1(0.7)
TB.SetMotor2(0.5)
time.sleep(1.0)

GentleStopMotors(TB)

The function takes the current motor powers and reduces them at a fixed rate until both motors are off. You can change the rate of the slowdown by adjusting the stepSize and delay values.