10 May 1996TRANSFER BELT UNIT
?Between colors, the revolver must rotate. When one of the development
rollers is near the drum, especially while the revolver is locking into place,
there is a chance of toner crossing over to the drum [A] (see
"Development"). Therefore, revolver rotation must be timed so that areas
of the drum facing the revolver when a development roller is near the drum
always arrive at a non-image area on the belt [B].
Detailed
[B]Descriptions
[A]
A166D659.wmf
1. After the start key has been pressed, the drum motor starts, and the drum
and transfer belt turn continuously.
2. The revolver motor then moves the first color development section into
position. For Red, the first color is Magenta, so the revolver has to turn
180 degrees. For Blue, the first color is Cyan, so the revolver has to turn
90 degrees. (See the "Development Unit" section for the positions of the
color development sections in the revolver.)
3. The next time the transfer belt reaches home position, the laser starts to
write the image data for the first color to the drum.
4. When the toner on the drum rotates past the transfer belt, the transfer
bias pulls the toner image off the drum and onto the belt.
5. Then, the revolver must move the next color development section into
position. For Red, the next color is Yellow, and for Blue, the next color is
Magenta. For either of these, the revolver has to turn 90 degrees.
When copying on A4/Letter size sideways paper or shorter, there is
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ACEC
