My motors / wheels fall off when I drive my car.
Cause: The car in the picture below has only the motors attached to the bottom of the RCX. It is possible that the car will be able to remain at rest on its own, but as soon as it starts moving the motors will probably break off from the rest of the vehicle. This happens because when the wheels ...
My wheels spin, but the car does not move.
If the wheels are not touching the ground, use bigger wheels or move the motors and axles down. The wheels could be going too fast for their own good. They spin too fast to be able to catch the surface. One way to fix this is to use larger wheels or to gear down the wheels (i.e. use gears so t ...
I used the gears with spikes (crown gears), and everything shakes.
Problem: Crown gear does not run smoothly. Cause: This may be because the horizontal crown gear is resting directly on top of the vertical gear. In other words, the weight of the horizontal crown gear and anything on top of it are being held up by the vertical gear. This is a bad design and it ...
My car is driving backwards.
If the car is driving in the wrong direction, you know that the wheels are turning in the direction that the program tells them to. Change the direction of both motor inputs or the direction of the motors in the program. ses
My car falls or tips backwards when I drive.
If the car tips forward or backwards when driven, the car might not be not balanced well. If the front of the car pops up when it is driven forward it is too heavy in the back or too light in the front. This is shown in the pictures below. Bad: Stationary ...
My car drives, but not straight.
Potential causes: The motors are on different power levels. The wheels are not lined up properly (height). The wheels may be bent. Each pair of wheels has the same two wheels. The gears are not lined up properly. Mismatched motors, all Lego motors do not have exactly the same power level. Bad: T ...
