How to adjust the bending angle accuracy of cnc pipe bending machine

How to solve the deviation and angle inaccuracy of pipe bending machine bending process. With the long time of use of pipe bending machine and hydraulic drive type hydraulic pipe bending machine, some mechanical parts begin to age, so we must have certain equipment for our pipe bending machine. In order to understand the reasons for the disassembly analysis. Generally, there is a deviation in the angle of the elbow. First, we should check whether the elbow angle controller of our bender, the encoder is damaged, and whether it is loose. After eliminating the encoder problem, we are checking whether the elbow arm is rubbed. Deviation of the elbow, and whether the oil temperature is too high, the bending speed is not uniform and the solenoid valve cannot control the oil pressure well.