3.4 Envelope/
Tape Transport
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
Sequence of Operation
The mailing machine is equipped with a sophisticated motion control system
that continuously monitors envelope or tape strip position along the trans-
port and triggers all key operations at the appropriate time in the machine
cycle.
The motion control system is designed to:
•
Detect the presence of a stack (DM400c) or an envelope or tape strip;
•
Move the print carriage assembly from the home to the print position
and initiate a purge (type E—see Table 3-2), if necessary;
•
Start the transport;
•
Measure envelope length;
•
Maintain a consistent gap between pieces;
•
Detect feed failures, jams and skew conditions and set the appropriate
error flag;
•
Trigger the meter debit process;
•
Initiate printing;
•
Repeat the process or return the print carriage to the home position.
3 • Theory Of Operation
3-11