Specification-Related Issues; Description On Fixing Roller Refresh Operation And Its Execution Timing - Canon imagePRESS C7000VP Series Trouble Shooting Information

5 Specification-related issues

5.1 Description on fixing roller refresh operation and its execution
timing
 Description
There is a case where the lead edge (cut edge) of paper hit the fixing roller and, thus, causes
shiny lines (1mm to 1.5mm wide) in the main scanning direction at the fixing roller intervals. To
prevent this, this machine has a control sequence for automatically refreshing the fixing roller
surface.
a. Execution timing
a-1. At time of cleaning the corona wire
a-2. At time of changing the paper size (from small to large)
a-3. At time of post rotation
b. Execution condition
The refreshing operation is executed when the media size counter this machine computes
reaches the threshold value.
c. Change of time spent for the refreshing operation
Changing the setting in user mode > System Settings > Device Management Settings >
Fixing Roller Auto Refresh Level will change the length of time spent for refreshing
operation. Changing the setting of this mode will also ease the execution condition of the
refreshing operation.
c-1. Default value '0': perform the refreshing operation for about 30 sec to 60 sec. (The
time spent for the operation changes depending on the media size counter.)
c-2. Adjustment range: between '-5' (30 sec) to '+5' (330 sec). Changing the value by '1' will
increase/decrease the length of time spent for the operation by 30 sec. Selecting a positive
value will increase the length of time spent for one operation while a negative value will
decrease it. If the value '-5' is selected, the operation is not executed.
d. Conditions other than the above
d-1. Interruption refreshing based on the video counter reading (1 sec)
d-2. Refreshing at startup. (3 sec)
For these conditions, changing the fixing roller auto refresh level setting will change a
parameter (the threshold value of video count), consequently changing the timing at which
this machine starts the refreshing operation. However, if the setting value is between '-5'
and '-1', the operation is not executed.
Note: No matter how many sheets of SRA3 or 13x19 size paper are fed, as papers larger than
these sizes are not used, shiny lines due to paper lint do not occur. Therefore, the media size
counter, the parameter for roller refreshing, does not increase.
Trouble Shooting Information for C7000VP series
Page 104
Rev. 2.0
2010/09/17