I. Overview

Today, with the implementation of the new "GMP" certification system for pharmaceutical companies, higher goals and requirements for pharmaceutical equipment have been put forward for pharmaceutical companies. It also provides unprecedented development opportunities and market space for pharmaceutical equipment manufacturers. However, traditional pharmaceutical machinery and control solutions can no longer meet the development needs of the existing pharmaceutical industry. The new generation of pharmaceutical machinery will be able to provide higher precision , A higher degree of automation control technology, to continue to meet the challenges of the market!

The drug filling machine is mainly used for the filling of liquid reagents such as vials and oral liquid bottles. During filling, the servo motor rotates to drive the screw rod to move up and down, indirectly drive the slider, and drive the plunger pump to move up and down. The principle is the same as that of a syringe.

This article introduces the application of Kinco servo on high-precision filling machines, which fully embodies the functions of Kinco servo programmable, intelligent origin, master-slave follow, etc.

2. Process requirements

Servo filling must be synchronized with the speed of the active axis. The speed of the spindle feeding bottle is fast and the filling servo speed must be fast. The servo must have a judgment function. When no medicine bottle is detected, the corresponding filling servo will not act.

The above process involves two simultaneous processes:

1. The nozzle servo follows the synchronization of the feed motor encoder, and the function is to open the nozzle, and the spindle command is the encoder signal pulse.

2. The filling servo is also synchronized with the feed motor encoder. The spindle command is the feed motor encoder signal output by the ENCODER OUT interface of the nozzle servo driver. Cong Zhou is the filling volume control of the filling servo. When the nozzle is inserted into the medicine bottle and the nozzle is opened, the filling servo starts, and the filling speed is related to the nozzle movement speed.

The realization of nozzle servo and filling servo synchronization process:

The encoder out interface of the nozzle servo driver outputs the feed motor motor encoder signal, which is fed back to the filling servo driver master encoder (main encoder input), and so on to connect to the rest of the servo. The system structure diagram is as follows

The nozzle servo moves synchronously from point A to point B in absolute positioning mode 1. The speed setting is the main encoder signal, and the position setting is the number of pulses corresponding to the two points A-B.

The filling servo also uses No. 1 absolute position mode, the speed setting is also the main encoder signal, and the corresponding maximum position is the maximum filling dose. The filling dose can be adjusted by adjusting the maximum position.

By adjusting the electronic gear ratio, the following speed of the nozzle servo and filling servo can be changed, and the appropriate electronic gear ratio can be adjusted according to the actual use.

Three, control plan

■Using the ED series servo master-slave follow function, the spindle encoder signal is input to the master encoder (master encoder input), and then output to the master encoder of the next servo through encoder out, and then connect to the remaining servos in turn.

■Using the servo's own origin function, the plunger pump returns to the same height every time through switch detection.

■Use the switch to detect whether there is a bottle during filling. This signal can be directly connected to the servo drive I/O or it can be fed to the servo through the PLC. If there is a bottle, the servo will start filling, and the speed is consistent with the spindle speed.

■After filling, immediately jump to the zero return mode control flow chart as shown below

■Using Eview touch screen to communicate with servo and PLC, you can set servo parameters on the touch screen, start the servo, reset faults, etc. Servo failure can be displayed on the touch screen.

四、System Configuration

Five, summary

This system gives full play to the characteristics of KINCO servo programmable, master-slave following, etc. The motion control curve is directly programmed in the servo drive, and the PLC only needs to complete the logic control function of the switch. The Eview touch screen is used to communicate with the servo drive, which can easily modify the servo parameters and monitor the servo status. I believe that with the deepening of the market, we can achieve more stable and cost-effective servo motion control solutions for customers.