Two Sheet Feeders Plus An Insert Mode - Pitney Bowes DI380 Series Service Manual

3 • Theory of Operation
3.6

TWO sHeeT FeeDeRs PLUs AN INseRT MODe

When the start button is pressed. The insert pre-feeder motor (M3) is energized and feeds a single
insert past the Double Document Detection (DDD3) sensor. If a double is detected, the machine will
stop and the double insert symbol will be indicated on the control panel. If no double is detected, motor
(M4) will energies and will feed the insert into to the insert collation area and stop.
The sheet feeder motor (M1) is triggered by the insert passing through the Double Document Detection
(DDD3), feeds the sheet over the Double Document Detector (DDD1). The Double Document Detector
(DDD1) triggers sheet feeder motor (M2) to feed the sheet through the Double Document Detector
(DDD2), both sheets stop, after a counted delay, in the collation nip. This will result in the sheets being
slightly over driven.
At the same time, the envelope motor (M9) is energized. An envelope is fed through the separator pad
and roller.
When the lead edge of the envelope moves forward to the envelope sensor (S1), the software sends
the signal to energize the collation motor (M5).
The transported envelope will stop in the insertion area at a predetermined time according to the size
of envelope programmed within the job setup.
The insertion solenoid (L1) energizes, followed by the hold down solenoid (L2), and finally, by the shoe
horn solenoid (L3).
When the sheet enters fold plate 2, covering sensor OP14, the software switches on the insert motor
(M4) after a timed delay. This delay is the "nesting constant" set in the parameter screen.
The next insert is fed after the first insert is nested into the folded sheets.
When the folded sheets and insert enter onto the pivot plate, this moves the flag out of sensor (OP5).
When the insert is fully inserted, the pivot plate moves backwards returning the flag to its home
position.
This operation triggers the software to energize the finger solenoid (L4), lifting the fingers and lifting the
brush of the sealer by energizing solenoid (L5). It will then de-energize the hold down solenoid (L2),
insertion solenoid (L1), and the shoe horn solenoid (L3).
The envelope is then driven from the insertion area into the sealer area. The next envelope is fed when
the lead edge of the envelope pushes the moistener sensor (S3) forward (the software will increment by
a count of 1 for the EIU). The envelope then enters the inverter area and finally exits into the stacker.
The exit sensor (S4) will increment the mechanical counter (located behind the manual advance knob
door) by 1.
This sequence is shown in flow chart form on the following page.
3-10 SDT333A DI380/DI425/SI3300/SI3500 Service Manual