tailieunhanh - LEGO MINDSTORMS - Robotics Invention System-2 Projects part 13

Tham khảo tài liệu 'lego mindstorms - robotics invention system-2 projects part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Robot 9 The SpinnerBot Spinner Flag Step 1 The rubber tire adds a lot of weight to the flag and makes the bottom stickier. Both of these properties make the flag easier to detect with the touch sensors. Remember you can build two of these 286 Robot 9 The SpinnerBot Troubleshooting Upon running the Capture-the-Flag program the SpinnerBot should try to lower its lifting arm and open the grippers. If the arm goes up instead of down try reversing the orientation of the electrical connector on the arm motor. If the robot begins moving without trying to reset the arm you need to check that the arm motor is connected to RCX Output Port A and that the main drive motor is connected to Output Port C. Once the arm has been reset SpinnerBot will begin trying to move forward. If it moves forward but turns while doing so one of the wheels is having a hard time turning. Make sure no loose wires or pieces are touching the wheel and try turning the wheel by hand to ensure it spins freely. You may need to reach into the underside of the robot and wiggle the gears of the drive shaft to make sure they are loose enough to not bind on a beam. If SpinnerBot moves backward and turns instead of moving forward check to see that the light sensor is in place and is looking at a white part of the Test Pad. If so you will need to reverse the electrical connector on the main drive motor. The SpinnerBot should reverse and turn when it reaches the black oval. If it fails to change direction at all check that the light sensor is in place and connected to the RCX. By pressing the View button on the RCX you can see what light level the light sensor is reporting. Under very bright conditions such as direct sunlight you may need to lower the WHITE threshold in the program to a lower value. If the light sensor is working properly but the SpinnerBot reverses without turning the ratchet on the right wheel is not engaging. This ratchet was added in Lower Arm Drive Step 5 and should have been set on top of