Independently remodeling the solution machine solution sharing

Reason for transformation

In 2011, our company introduced the AGFA Advantage N-DLS type violet laser newspaper CTP , and has been supporting the use of Gu Longyan plate-making machine. The equipment is in good condition.

According to the working principle of the violet laser newspaper CTP, after the printing plate enters the plate printing machine from the CTP, it needs to be preheated and solidified first, then enters the developing solution tank through the brush, and then the printing plate is washed out after the developing solution tank. , gluing, drying these processes, and finally produce the finished product. It can be seen that under normal conditions, the brush roller should be rotated in time to ensure that the film on the printing plate can be cleaned; the developer replenishing pump should be added in time when the developer is insufficient, and it is not necessary to add when the developer is sufficient.

However, in the past two months, Gu Longyan Rising Machine will have irregular failures such as brush roller rotation and developer replenishment pump uninterrupted work in this process, resulting in plate failure, resulting in plate waste and impact. The normal operation of production.

After troubleshooting the equipment, it was found that the reason for the failure of the Gulongyan plate-making machine was that the control circuit board was abnormal. The specific performance was that the output voltage of the control board was sometimes absent, which caused the function of the plate-making machine to be abnormal. In this regard, the usual solution is to replace the control board, but if you order the control board directly from the supplier, you need to ship from Europe, which requires a long period of time and high cost. To this end, we decided to design and install a control circuit to control the functions of the processor and restore it to normal.

Transformation process

The part of Gu Longyan's normal working state is temporarily not modified and continues to be used; an auxiliary circuit system is installed outside the circuit part where the fault occurs, that is, an electro-optical probe is installed at the entrance of the printing plate into the printing machine. The auxiliary circuit system is shown in Figure 1. 1(a) is a simplified circuit diagram of the auxiliary circuit system. The relays KA2 and KA3 are controlled by a pair of control contacts (normally open contacts: electrically closed, de-energized and disconnected), and delay relays JS1 and JS2. The control circuit is shown in Figure 1(b).