Real Time Process Control; Timing Of Judgment - Ricoh MP C3004 Field Service Manual

Timing of Judgment

The patterns on the transfer belt are read and the amount of the amplitude of the speed change (by the
MUSIC sensor).
The drum phase sensor correlates the amplitude with the positional information of the drum rotation.
The operation result is saved into SP1-903-003(B) and SP1-903-004(FC).
If the result is lower than 5 micrometers, the amplitude correction is not done.

Real Time Process Control

During printing, 5 mm patterns are created outside the normal imaging area on the transfer belt, and the
image density is corrected in the real time, to improve printing of solid areas. However, note that if the
optional Imageable Area Extension Unit is installed, this process is disabled.
Normally, the real time control is done once every 10 sheets, but it could be done once every 5 sheets
depending on the density detection level.
The frequency depends on the following SPs.
• SP3-301-001: RTP Pattern:Set:Create Intrvl:BW
• SP3-301-002: RTP Pattern:Set:Create Intrvl:FC
To see the latest result, check the following SPs. If there is an error, the result will not be updated.
• SP3-300-001 to 004 RTP Pattern:Disp:M/A(Latest):Each Color
• SP3-300-001 to 004 RTP Pattern:Disp:M/A(Target):Each Color
Process Control
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