Medical inspection is an indispensable link in modern medical research, and biochemical analyzer is one of the necessary instruments in medical inspection. Since the price of large-scale fully automatic instruments can easily exceed hundreds of thousands, these instruments have only appeared in large medical institutions in the past. With the improvement of living standards, people pay more and more attention to their physical conditions, and small-scale biochemical analyzers are getting more and more attention.
Generally, a fully automatic analyzer can be divided into a software part and a step control part. The function of liquid taking and pipetting is realized by using the software developed by embedded to control the step control module. Among them, the stepping control module can be divided into three parts: the central controller, the stepping motor drive and the stepping motor. The specific requirements are as follows:
Central controller: the controller that sends pulses to the motor；
Stepper motor driver: three stepper motor drivers, which are required to meet the requirements of low and medium speed and low noise, encoder function and limit stop function, etc.;
Motor: 3 pieces two-phase stepper motors.
This traditional control mode is relatively composed of many modules. In addition to the need for drivers and PLCs, a controller that sends pulses to the motor must also be prepared. The overall cost will increase relatively, and the structure cannot be minimized.
In order to reduce costs and reduce space structure, we can use PMC005's new control mode. This mode subtracts redundant drivers and a separate pulse-sending controller. Only a PLC that sends instructions, a PMC005 and three motors can realize the function of the entire sampling system, saving customers the purchase and installation of controllers. (Pulse module) and the cost of the driver, so that the automatic sampling system of the small automatic biochemical analyzer can be miniaturized.