乐高机器人EV3搭建图Bonus - SUP3R CAR geared up.pdf

X4 SUP3R CAR geared up! In this bonus chapter, you will modify the SUP3R CAR to make it faster! Using gears, you can increase the speed of the driving wheels. The program needs to be modified as well. Actually, only the Drive My Block must be changed, to accommodate for the wheels change of position and direction of motion. Find out more on http:/EV3L.com. 2 Chapter X4 main assembly Remove the parts shown in the box from the main assembly. SUp3r Car geared Up! 3 Push the 8s axles in, until they almost touch each other in the middle. 4 Chapter X4 SUp3r Car geared Up! 5 6 Chapter X4 Add the subassemblies back to complete the SUP3R CAR. SUp3r Car geared Up! 7 editing the Drive My Block You should edit the Drive My Block, because adding the gears changed the position of the rear wheels. In particular, you must change the values of the two Constant blocks. Change the first block parameter to 77 (the half-distance between the rear wheels is larger than before). Change the parameter of the second Constant block to 145 (the distance between the front and the rear wheels axes is decreased). The gears changed the speed and also the direction of rotation of the rear wheels. So, change the formulas of the Math blocks by removing the minus sign in front of the a parame