Servo motor is one of the core devices in the laser cutting system, equivalent to the "limbs" of the machine, and the control system is the "brain" of the machine, the "brain" and "limbs" cooperation is crucial, with good cooperation, the performance of the machine can be fully released to achieve the desired purpose; On the other hand, the performance debugging of the servo motor is also very important, a simple and practical servo debugging software, not only can simplify the servo debugging work, but also can quickly form a closed loop with the control system, to achieve twice the effect.

In the previous laser cutting machine debugging process, servo debugging is also a relatively long and difficult work for the whole equipment debugging. We often face the following problems:

How to connect each servo motor and servo driver? Is the servo driver communication mode pulse or bus? Is the parameter modified by the servo debugging software or by the display panel button? Servo motor rigidity and interpolation accuracy? How to optimize the cutting effect? Faced with a wide variety of servo drives and motors in the current laser cutting market, our DENso personnel always do not know whether to drive medium-voltage power supply or high-voltage power supply, and do not understand why some servo drivers need to connect to the controller with a push cable, and some only need a network cable?

In order to ensure the accuracy of the machine tool operation to meet customer requirements, many times, our debugging personnel debugging servo is connected to the laptop computer through the data line, squatting next to the servo electric cabinet for many times debugging parameters. The following error of the motion, the accuracy of the arc, the overshoot of the corner and other phenomena are closely related to the servo parameters, and all need to be optimized by adjusting the gain of the servo. However, at present, there are many servo motor brands in the laser cutting market, and the corresponding servo drivers and drive debugging software are different, which requires debugging personnel to understand the debugging software and debugging parameters of various brands, greatly improving the difficulty of debugging personnel. And many debugging personnel adjust the servo parameters are by experience or try the way, the understanding of various servo parameters on the cutting effect is vague, it is also difficult to find the system professional tutorial, so it is difficult to debug.

To solve the above problems, Germany BECKHOFF provides a PC-based EtherCAT bus numerical control system, which controls the servo motor by means of network cable data transmission, simplifying the servo connection. The servo driver with EtherCAT bus interface can transmit PID parameters through EtherCAT bus, which provides a good theoretical basis and technical support for debugging each servo parameter. Then, each EtherCAT bus driver related parameters corresponding to EtherCAT address is not the same, if through the underlying software of Beckford TwinCAT to debug and configure servo parameters, it puts forward a certain technical threshold for debugging personnel. Based on the pain points of industry development and the needs of market development, the core technical team of Westen company has more than 15 years of technical experience in in-depth research and secondary development of German BECKHOFF bus CNC system, combined with more than 20 years of laser cutting technology and process experience accumulated by the core technical team, with the understanding of each bus servo and long-term cooperation. On this basis, the WDSD-E series of fully digital intelligent laser cutting control software (hereinafter referred to as WisCut software) is developed and launched. The built-in servo debugging module of the software integrates the servo parameter adjustment of the common servo brand in the laser cutting market into the software, and adjusts the servo PID to the software interface. It can read and write PID in real time in the upper software and integrate oscilloscope function at the same time, simplify the servo debugging process, optimize the servo debugging parameters, and greatly reduce the difficulty of servo debugging.

Users only need to open the WisCut software Settings page, select the current machine supporting servo motor (menu drop-down select the corresponding servo brand), the current WisCut software supports the mainstream brand of laser cutting market servo, including European Beifu, Moli, Japanese Yaskawa, Panasonic, domestic Taiwan's Taida, Huichuan and so on. You can select the servo brand used by the machine through the following interface. Click OK to display the interface of servo debugging parameters of the corresponding brand.

Click "Machine tool debugging" and "servo debugging" on WisCut software to enter the servo debugging interface, and the software will pop up to switch to MDI mode, select "Yes" to confirm, select the corresponding axis on the right side of the interface, click "Read" to read the corresponding drive data, modify it, and click "Write" to brush the modified data into the drive in real time and save it.

After modifying the servo parameters, if we want to optimize and debug the servo performance, we can select the corresponding movement mode, set the appropriate movement distance and speed, and the code corresponding to the axis positioning movement will appear. Click the Start button to do some positioning operations on the axis. At the same time, the left side of the software provides oscilloscope function, oscilloscope can monitor the waveform diagram of various parameters of the servo motion, the actual position, the command position, the following error, the actual speed, the command speed and other parameters, and the main observation of several parameters when debugging the gain. Four axes can be observed at the same time, or a single axis can be observed, and PID parameters can be adjusted according to the waveform changes, and whether the gain parameters are appropriate can be found by observing and comparing the waveform. In the debugging, you can also simply use the steel grade to debug the motor performance, the software has done a good 1 ~ 31 steel grade parameters, in the actual debugging will be filled in the steel grade parameter, such as 18, then the corresponding position ring gain, speed ring gain, speed ring integral, will be changed to this steel grade parameters, and then click Write, You can write the parameter.

You can also modify the corresponding parameters by referring to the following PID parameter descriptions.

The servo debugging function module of WisCut software, in addition to being compatible with mainstream servo brands, can also be easily and quickly linked to other brands of servo, the actual application has verified many different brands of servo, such as Reisai servo, Gaochuang servo, Fuji servo, Luoyuan servo and other servo motors, the configuration steps are relatively simple.

WisCut cutting system provides a convenient and fast way to debug the servo, but also provides a variety of servo configuration of the open function, for us to debug laser cutting equipment to provide convenient and diverse solutions.