Pitney Bowes DM300c Service Manual page 42

3 • Theory Of Operation
3.4 Envelope/
Tape Transport
#10 Envelope
#10 (241.3[mm]=9.5[inch])
500[mm/sec]
FS1
Separate Roller
Figure 3-10 DM300c/DM400c Transport Layout
3-12
Sequence of Operation (cont'd)
Sensor Inputs. The transport is equipped with five sensors in the case of
the DM400c, and three in the case of the mailing machine. See Figure 3-10
below for a diagram of the transport layout.
Autofeeder. FS1 (Feeder Sensor 1) is the stack present sensor. FS2
is a lead edge/trail edge sensor, the input of which helps the system de-
termine envelope length. It also serves as a fail-to-feed detector in the
event that a mailpiece fails to reach FS2 within a predetermined time.
See Figure 3-11 for the location of the autofeeder sensors.
Feeder
500[mm/sec]
FS2
Mailing Machine. Sensor PS1 (Printer Sensor 1) is the lead edge sen-
sor (see Figure 3-12). It detects the lead edge of the mailpiece and
initiates movement of the print carriage assembly from the home to the
print position. (The carriage is home when the carriage home sensor is
blocked).
Printer
Tape
300[mm/sec]
609.6[mm/sec]
PS2
PS1
Input Roller
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
PS3
Output Roller