The way to make the roller go in a straight line

The road surface operation is slowly fine-tuned according to the angle between the wheel and the curb, and when walking back, look at the line just pressed as a reference. It is easier to operate on a large field, first press out a straight line, and then use the straight line as a reference. Note here, use chalk and pen to mark the fixed seats in the car, it will be very easy for you to know which ones need to be pressed and where there is no need to press them.
This simple method can also be used for the roller to walk in a straight line without reference.
Another method is to use the principle of three points and one line to walk in a straight line. One point for the eyes, generally look at the engine cover at the back, and some people look at the exhaust pipe, it doesn't matter which one you choose, this is also a point, and the ruts pressed when walking forward are counted as a point. When the roller is backing up, the point where the eye can see the cover of the machine should not be too far from the left and right sides of the rut, so that it will not bend too much when it is pressed out.
Of course, if you are familiar with it, you should look at the rear view mirror. When you stop moving forward, you can see the corner under the fuel tank or battery box at the rear by taking a look at the rear view mirror. In fact, it's okay to keep looking at the rearview mirror and stay away from the rut.