remove the transfer roller and cleaning roller from the transfer belt.
This procedure only occurs when the ITB is lifted into position against
the drum.
The print process continues as described in the image formation
section. Once the full image is on the ITB, both CL4 and CL3 are
activated, and the transfer roller and cleaning roller are moved into
position against the ITB. This time the image is transferred from the
ITB to the media. Any residual toner left on the ITB is charged
positively for removal.
Once the print job is complete, CL4 and CL3 are deactivated and the
transfer and cleaning rollers are moved away from the belt. CL2 is
then deactivated and the ITB is lowered to move it away from the
drum.
Home position detection
The home position of the ITB is detected to precisely transfer the four
toners to the intermediate transfer belt and align the leading edge of
print paper with the leading edge of the image.
In the area outside of the toner transfer area of the ITB, there are
home position detection holes. With the ITB rotating, the home
position detection sensor (PS5) detects a hole and sends the
information to the DC controller.
When the ITB home position detection signal is detected by the DC
controller, it sends a top of page signal to the formatter. The formatter
sends the image data and the DC controller begins to create the
image. For full color printing, this process is repeated four times to
form the image.
Figure 5-16 Home position detection
108 Mechanical systemEN |