Application of Full Digital DC Servo Driver on Large Format Printer Abstract: This article mainly introduces the application of digital DC servo driver in inkjet printer. Keywords: servo driver inkjet printer 1 Introduction With the vigorous development of the domestic economy, the advertising industry has also developed rapidly. This tempting market makes advertisers competing to invest in outdoor inkjet equipment. From imported inkjet printers to domestic inkjet printers, it is all over the place! Therefore, the requirements for the performance of large format inkjet printers are also increasing. 2 large-format inkjet printer motor description (Figure 1) Ink pump motor, control nozzle spray 3 inkjet printer system design Figure 2 inkjet printer system architecture (1) Motion Control System: KONICA256 control system, including servo control card, nozzle control board, ink supply system board (2) Spindle system: Full digital DC servo driver (PH100DC) (Fig. 3) (3) Feeding system: Full digital DC servo drive (PH100DC), (4) Sprinkler: KONICA256 3.2 Motion Control Boards and Printing Software 3.2.1, motion control board KONICA256 control system, including servo control card, nozzle control board, ink supply system board, the main control board for the USB interface. 3.2.2, inkjet software - Mengtai inkjet software Accepts PostScript files, TIFF, JPG, EPS graphics files; direct print output, fast speed, automatic block output. 3.3 Feeding motor and trolley motor The motor in inkjet printer is divided into three categories from function: ink pump motor, feed motor and trolley motor, and the ink pump motor power is small. This article does not focus on the introduction, only the selection of feed motor and small car motor Type application to explain in detail. The stepper motor has large torque at low speed, but the stepper motor mechanism determines that the stepper motor cannot support speeds of more than 600 RPM. In addition, due to a defect in the positioning of the stepping motor when it is stopped, it will cause a positioning error, and it cannot satisfy the current High-speed and high-efficiency requirements for inkjet printers. Feeding system requirements: It is required to be able to rotate forward and backward, and the feeding and releasing speeds should be kept stable. When it stops, it will automatically lock and prevent the cloth from falling off. Test result: It is better to maintain the synchronization performance with the control card of the upper computer, and the error of cloth movement is within 2 pulses. Below is an example of how to select motors and actuators via nozzles Design 2: nozzle motor gear diameter R = 0.0075m, the outer ring of the reduction wheel R1 = 0.034m, the inner ring of the reduction wheel R2 = 0.021m, the nozzle acceleration time t = 0.3s, the nozzle mass M = 5kg, the rail friction force f = 20N The print speed of the nozzle is V=1.2m/s, the reduction ratio of motor and guide rail is j=6, and the transmission efficiency is η=0.85. When the printing speed is 1.2m/s, the maximum torque required by the motor is 0.16Nm, the required rotation speed is 2471RPM, and the PH100DC motor output torque is 0.21Nm at a constant rated voltage, and the rotation speed is 2500RPM, which can meet the high-speed requirements. The acceleration time of the motor from 0 to 2475 RPM is 0.3 s. The platelet plate is stable and vibration-free during the movement, and the holding plate is kept sufficiently strong when it is stationary. System test conclusions: The servo performance of the nozzle axis and the feed axis is mainly due to the high dynamic response and high positioning accuracy of the servo system. All-digital DC servo driver is based on hardware platform of advanced technology such as special motion controller DSP and high-efficiency MOSFET. It has high-speed frequency response, resonance suppression function, can be accurately tuned and eliminates vibration; the control accuracy can reach 1 pulse, the largest input The frequency can reach 250Kpps, which is a good guarantee for the required drive into the cloth axis. For spindle servos that require fast start-stop characteristics and stable speed control, all-digital DC servo drives are DSP-based hardware controls with open-style parameter adjustment interfaces that can be used to set parameters based on user usage. These features are unmatched by stepper motor systems and analog servo systems. 4 Concluding remarks With the constant pursuit of inkjet printing market for inkjet printing and printing speed, UV flatbed inkjet printers will be gradually introduced to the market. With the development of UV flatbed printers, supporting servo motors will also be upgraded. In the high-end inkjet printer market will be based on AC servo motor system, but in a long period of time the low-end market will still be dominated by DC servo motor system, after all, the price advantage of DC servo unmatched. High Voltage Lan Transformer,High Voltage Pwoer Pulse Transformer,Cmc Coilfor Automotive Product,High Voltage Pulse Transformer IHUA INDUSTRIES CO.,LTD. , https://www.ihua-transformer.com
The current problems faced by large-scale inkjet equipment include: How to significantly reduce the cost of the machine, so that customers in small and medium-sized cities can also afford it; How to make large-scale printing equipment to improve the print quality, expand the scope of application; How to make the servo motor and servo drive speed up with the nozzle Ignition frequency. At present, domestic and foreign inkjet printer parts suppliers are solving these problems.
For inkjet printers, this paper will focus on the selection and application design of the feed and trolley panels in inkjet printers.

Figure 1 inkjet printer
Feeding motor to form an automatic feeding system;

Spindle motor controls the travel and position of the car plate;
3.1 System Architecture (Figure 2)
Spindle motor (PM100DC-100W);
Feed shaft motor (PM100DC-100W)
At present, the feeding motor and the car plate motor of the inkjet printer are divided into a stepping motor and a servo motor from the motor type, and the servo motor is further divided into a DC brushed motor and an AC brushless motor.
Due to the fast response, high speed, and high positioning accuracy of the servo motor, inkjet printers now generally use this type of motor as the feed motor and the car control motor. In terms of cost pressures, the mainstream motors in low- and medium-speed inkjet printers are low-voltage DC servomotors. The supporting controllers are analog servo drives and all-digital servo drives, respectively. The analog servo driver is represented by DB810A of Shenzhen Raytheon Technology. All digital servo driver manufacturers are mainly represented by Shanghai Zheyou P system and Shenzhen Raytheon's DCS810 series. Due to the drift of the analog circuit in use, the analog servo driver is not suitable for high speed positioning applications. This article focuses on the application of P series digital servo controllers on inkjet printers.
Design: Adopting PH100DC servo driver + PM100DC servo motor, the maximum output power is 100W, the number of encoder lines is 1000PPR, the positioning accuracy is plus or minus 1 pulse, the lock-in current is 6A, the response frequency is 20KHZ, and the maximum speed is 24V rated voltage 2500RPM, rated torque 0.29Nm.
Car plate control system requirements: high-speed response, the highest speed up to 1.2 meters / second, mechanical reduction ratio of 1:6, the use of PH100DC servo drive + PM100DC servo motor, positioning accuracy of positive and negative 1 pulse, the maximum speed at 24V rated voltage is 2500RPM , Rated torque 0.29Nm, shaft diameter 8mm.