Envelope Feeder The operation sequences of the Envelope Feeder are controlled by the Envelope Feeder Driver. A 4-bit microprocessor is used in the Envelope Feeder Driver, which controls the sequences of the Envelope Feeder and the serial communication with the Engine Controller Board of the printer. The Engine Controller Board outputs the pickup command to the Paper Feeder Driver with the necessary timing. The Envelope Feeder Driver drives the solenoid in response to the command. The Envelope Feeder Driver also returns the Envelope Feeder status to the Engine Controller Board.
+24VDC is supplied to the Envelope Feeder from the printer, and +3.3V for the ICs is generated from the +24VDC inside the Paper Feeder Driver. Pickup and Feeding The Envelope Feeder picks up the envelope from the Envelope Feeder and feeds it to the printer. The envelope path is shown below. Figure 5-29 Envelope Feed The Envelope Feeder is driven by the Main Motor (M101) of the printer. When the /PRNT signal is sent to the printer from the Formatter, the printer starts the initial rotation phase. (This phase consists of Main Motor start-up, Scanner Motor start-up, High-voltage Control Sequence, and Fusing unit start-up.) When the initial rotation phase 5-44 Functional Information