Pipelayer Solution

- Nov 07, 2018-

Pipelayer solution

After freely changing the roll, the two sides are trimmed, and the feeding motor is stretched and fed into the flange forming mechanism. The forming mechanism is a process of rolling up the flat material on both sides to form a cylinder. The formed reel is welded by the high-frequency welding mechanism on both sides, and after cooling, it enters the main traction, and the speed of the whole equipment is controlled by traction to achieve the purpose of speed regulation. The pulling out is the molding cylinder material, and the cutting is required by servo chasing. Cutting is divided into two modes: 1. Fixed length cutting mode, chasing axis servo controls cutter movement according to encoder signal, servo built-in chasing process algorithm, automatically generates control curve according to encoder signal, and cooperates with cutter to realize fixed length cutting Purpose, when the fixed length color code does not work, the servo chasing mode runs at this time; 2, the labeling mode, firstly design the cam curve on the servo background (as shown in Figure 5 below), the spindle length is set according to the shortest material, 100mm The number of slave axis pulses is 1mm corresponding to 400, the spindle pulse is 27mm corresponding to 2000 pulses, and four points are set (divided into starting origin, entering sync area, exiting sync area, returning to origin), and the spindle encoder is within 100mm. After that, 0-10mm is the acceleration zone, 10mm-50mm is used as the synchronization zone for cutting, and 50-100mm is used as the returning origin and then enters the next cycle. Finally, the generated cam curve is as shown in the following figure (4). Each time the color code signal servo is sent for one cycle, the material of each cycle passes 100mm. When the material is larger than 100mm, the servo will wait for the origin again. The distance between the tangent point and the color mark can pass. The moving color mark position is realized, and the servo operates in the universal cam mode.

The two modes need to be switched by PLC communication to change the internal parameters of the servo. The customer can set the switch through the HMI to achieve the fixed length and the standard control accuracy within 1mm (as shown below), the maximum speed is 150PCS/min.

Customer original plan

The original system enters the encoder and the color code signal into the PLC. After the internal calculation of the PLC, the servo servo and the cutter are controlled, resulting in short response, large error, unstable system and poor usability.

Program advantage

1) The control accuracy is greatly improved, and the measured accuracy is within 1 mm;

2) The encoder and the color code signal directly enter the servo to make the system respond faster;

3) Servo built-in electronic cam algorithm makes the PLC program much simpler and easier to use;

4) System integration, the full range of Huichuan products have good compatibility and the failure rate is reduced;


IS500 series servo drive products are high performance medium and small power AC servo drives developed by Huichuan Technology. The power range of this series is 100W~7.5kW, it supports MODbus communication protocol, adopts RS-232\RS-485 communication interface, and can cooperate with the host computer to realize the networking operation of multiple servo drives. The rigid table setting, inertia identification and vibration suppression functions are provided to make the servo drive easy to use. Suitable for semiconductor manufacturing equipment, placement machines, printed circuit board drilling machines, handling machinery, food processing machinery, machine tools, conveyor machinery and other automation equipment, to achieve fast and accurate position control, speed control, torque control.

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