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Does the motherboard of Gong Zheng inkjet printer give an ink supply signal or a circulating signal?

The signal given by the main board of the inkjet printer is an ink supply signal. The ink supply signal controls the solenoid valve on the ink supply plate, and opens or closes the ink supply channel as needed to control the flow and speed of ink. The motherboard of the inkjet printer also has other control signals, such as motor driving signals and sensor control signals, to coordinate and control the operation of the entire inkjet printer.