1. The whole process of CNC lathe cutting machine with error control is actually carried out by pulse signal, and the whole process of replacing the slash with a straight line in the middle of two points. The bending of the pipe bending machine is about 900 points a week. The total number of dot management decides the proximity level of the straight line and the slash. The bending of the automatic pipe bending machine has a large length of 100mm, which is sufficient for the accuracy of construction projects at present. On a basic level, the dot count is getting closer to the slash. However, there is no doubt that the increase of the total number of points has a higher requirement for the storage professional ability of the system configuration, but also increases the amount of computation. The total number of outlets is too large is of no practical significance. But the total number of outlets is too small, and can not take into account the accuracy required by the construction project. The effective way to solve this contradiction is to establish the initial dot interval according to the total number of ordering dot, and to control the proximity level of line and slash for each dot, that is, error control. For example, the spacing of the straight line segment after the center of the adjacent two-point slash is the error control specification, such as control within 0.005 mm. If it does not conform to the error specification, the dot interval is adjusted appropriately in a part until the error control specification is taken into account. Then the initial dot interval is repaired and the error control is carried out again.

3. The degradability of exercise and fitness during the whole process of pipe bending by the cutting torch is: the change of arc coordinate S of the intersecting line and the rotation along the Z axis of the pipe axis to be cut are studied qualitatively; The Z coordinates of the intersecting line and the motion of the pipe cutting axis are studied qualitatively. ; The change of the bend Angle of the pipe bender is qualitarily studied. The method of bending the pipe of the pipe bender is carried out several times around the laser pipe cutting machine of the vertical numerical control machine. In the upgraded Japanese CNC machine laser pipe cutting machine, the three sub-exercises are carried out by the AC motor electromagnetic speed motor control.