How do excavators distinguish between positive and negative?
The left joystick, if it is front and rear control rotation, that is backhand, if it is left and right spin control, turn is forehand
Positive shovel: the form of shovel action of excavator. It is characterized by "forward, upward and forced cutting."". The positive shovel has great excavation force and can dig the soil above the stopping surface. It should be used for the dry foundation pit with excavation height greater than 2m, but the upper and lower ramps should be set up. Shovel bucket excavator with the same equivalent ratio of the bucket to be big, but not more than one to three excavation of soil water content of 27%, and with the completion of the whole mining dump truck transport operations, you can also tap the large drying pit and mound etc.. According to the difference between the excavation route and the transportation vehicle, there are two ways to dig and unload the soil: forward excavation, lateral unloading, forward excavation and reverse dumping.Face shovelBackhoe digging is: "back down, forced the soil cutting, the mining power shovel can stop a small, excavation to three below the soil surface, suitable for the foundation pit, foundation ditch, trench excavation depth is less than 4m, but also for soil excavation, wet soil with higher water content and groundwater level following the underground water level is high and the earth. There are two ways to operate the backhoe, namely, ditch end excavation and side ditch excavation.
Two modes of operationThe first kind is the Japanese second-hand import machine and senior veteran driver as the representative, the left hand handle of the front, back, left and right corresponding control is the excavator's right rotation, left rotation, bucket extension and bucket recovery. We used to be referred to as "front and back spin"".The second type is the domestic new machine and the new generation of young drivers as representatives, left hand handle of the front, back, left, right, respectively, corresponding to the control of the excavator's bucket stick, bucket recovery, left rotation and right rotation. We used to be referred to as "left and right spin"".There are people who have called these two modes, "mobile phone" and "mobile phone", but due to the lack of a unified nomenclature, caused the differences on the way, before and after rotation is called mobile phone, the mobile phone is called reverse rotation, but also to rotate around the mobile phone is called, before and after the rotation is called reverse mobile phone. So to avoid confusion, said only this, before and after the rotation and rotation, to note here is "mobile phone" is refers to the rotation, and rotation or rotation before and after the "anti mobile phone", two kinds of the different mode of operation is only the left hand excavator operating handle, right invariant handle mode.Two ways of shoveling soil
