Gestetner A193 Service Manual page 802

2.5.2 Duplex Printing
If there is enough memory to store the data of six pages and the controller
can process the data faster than the printing speed (this depends on the
processed data), the printing sequence is the three-sheet batch mode. The
printing sequence in this mode is as follows:
2nd page/4th page/1st page/6th page/3rd page/8th page/5th page/10th page...
If the memory or the controller does not satisfy the above conditions, the
controller automatically shifts down the printing speed to the two-sheet batch
mode or the one-sheet batch mode. (For double letter and A3 size paper,
only one-sheet mode is available.) Each printing sequence is as follows.
Two-sheet batch mode:
2nd page/4th page/1st page/3rd page/6th page/8th page/5th page/
7th page/...
One-sheet batch mode:
2nd page/1st page/4th page/3rd page/6th page/5th page/...
NOTE: The printer controller goes through this determination sequence for
each page, not just the first few. Therefore, the duplex batch mode
may change several times during a single copy job, depending on
the specific qualities of each page's data.
The following flow chart demonstrates this process for the first few pages.
1 sheet mode.
SM
A3 or DTL
Y e s
size paper?
N o
Prints second
page.
4th page's data
N o
avaliable?
6th page's data
Y e s
3 sheet mode
1-13
Prints 4th and
Y e s
1st page.
N o
2 sheet mode.
available?
A643D500.wmf
(A643)