tailieunhanh - LEGO MINDSTORMS - Robotics Invention System-2 Projects part 9

Tham khảo tài liệu 'lego mindstorms - robotics invention system-2 projects part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Robot 6 The Aerial Tram The Motor The tram uses only one motor. Plug the electrical wire into RCX Output Port B. Motor Step 0 from the motor to the wheel. Bricks Chips. Using Gears Gearing up driving a smaller gear with a larger gear provides speed. Gearing down driving a larger gear with a smaller gear provides more power or torque. 186 Robot 6 The Aerial Tram Motor Step 1 Make sure that the motor is attached to RCX Output Port B and that the program is written to power Port B. Inventin Grabber Arm Use the second motor to power a grabbing arm. Attach the arm to the base of the tram. The arm can carry things across the canyon pick things up or drop items where needed. Program the light sensor to open and close the grabber arm in response to a flashlight signal. The Touch Bumper The bumpers on each end of the tram allow the tram to sense when it is at the end of the cable line so it can stop or pause and reverse directions. You will need to build one bumper for the front of the tram and another one for the back. 187 Robot 6 The Aerial Tram Bumper Step 0 Each bumper will hold a touch sensor. Attach the electrical wires to RCX Input Ports 1 and 3. Make sure that the program is written for the touch sensors connecting to these ports. Remember to build two bumpers Bricks Chips. Touch Bumpers It is important to create a bumper in front of the touch sensor instead of using the touch sensor by itself. The bumper increases the surface area of the touch sensor and allows for a better response. It is also good to create the bumper so that different amounts of pressure will allow contact to the touch sensors. Rubber bands or flexible tubing pieces are also good choices when building bumpers. The Constructopedia has several different bumper ideas that could be substituted here. .