1. Pain points of plane laser cutting machine 

1.1 on the market, most of them use single laser, and use manual feeding and unloading, resulting in low efficiency of actual cutting.

1.2 the actual effect of most brands on the market tends to be the same, with weak competitiveness and serious homogenization.

1.3 single function of machine tool, low bargaining power.

2. Introduction of cooperative manufacturers

A company in Dongguan, the current cooperation model is 3015 three head laser synchronous cutting equipment. The feature of the scheme is that the single bus controller controls three laser heads at the same time, supplemented by the online cutting function, with good synchronization.

At present, the price of medium and small power laser is dropping by half at the rate of 18 months. The efficiency of medium and small power single head cutting machine tool has basically reached the bottleneck. If the equipment manufacturers want to expand the sales volume of equipment, they must configure equipment with differential function. On the basis of a certain laser power, it is necessary to increase the laser head power.

There are two original schemes for customers: one is the plane cutting machine with simple single laser head, with positioning accuracy of ± 0.05mm and repeated positioning accuracy of ± 0.03mm; the second is to control the three laser heads with three sets of numerical control systems, with complex control and poor synchronization.

After using the scheme of Tsino Dynatron, the customer directly uses a set of controller to control the simultaneous operation of three laser heads. The operation is simple. The cost of the customer's machine tool is reduced by tens of thousands yuan, the positioning accuracy is ± 0.03mm, the repeated positioning accuracy is ± 0.015mm, the air moving speed is 50M / min, and the efficiency is at least 80% higher than the original scheme.

4. Characteristics of controller and driver in multi head cutting scheme

4.1 Controller——ROBOX Controller

1)   Online cutting function, through controlling the linear speed of rack, matching the online speed tracking of laser cutting head, online cutting is realized.

2)  Multi head cutting, controlling multiple laser heads to cut on line at the same time, the efficiency is doubled, the safety range is set, the cutting safety is guaranteed, the equipment downtime is reduced, and the cutting efficiency is increased.

        4.2 Servo Drive ——CoolDrive S7

      1) The response of current control is high, the current update time is only 2.5us, and the 16 bit current sampling accuracy.

      2) The speed loop has high frequency response, up to 3kHz, which can realize high dynamic response.

      3) Support on-line self-tuning, servo debugging process is simple, technical requirements for customers are reduced.

      4) Gantry synchronization, the driver has its own special gantry synchronization interface, through the bottom hardware real-time interactive information, the Real time of synchronization control is better than through the upper computer to control the gantry synchronization.

      5) Quadrant protrusion suppression and other vibration suppression functions can reduce the vibration at the end of the laser head, improve the cutting accuracy and efficiency. 
      6) The drive information is Easy to view and the device status information can be read directly from the OLED display screen of the device.

      7) Bluetooth debugging function, S7 can connect with intelligent terminal through Bluetooth, quickly check the status of the device, real-time debugging, fault analysis and processing, so that the operation becomes simpler and more intelligent.

5. Multi laser head servo electrical configuration

6. Concluding remarks

    For the multi head gantry laser cutting machine, there is no room for further improvement in the common pulse control mode, and the synchronization, accuracy and processing efficiency have gradually reached the bottleneck. And the high-performance servo system like CoolDrive S7, which supports EtherCAT bus communication, is very suitable for high demand application scenarios such as laser cutting machine tools.