Ricoh Pro C7200x Operating Instructions Manual page 15

Leading/Trailing edge correction
To prevent image quality problems caused by the unstable condition of the paper when it enters the nip
of the PTR, the belt-to-paper transfer bias is adjusted for the leading/trailing edges.
The following are the three bias correction settings that adjust the bias level and duration.
• Belt-to-paper transfer: Constant voltage
• Belt-to-paper transfer: Leading edge correction
• Belt-to-paper transfer: Trailing edge correction
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• Current vs. Voltage
• Bias is applied using 'constant current' for drum-to-belt and belt-to-paper transfer, as this
method is resilient to changes in operational environment and thickness of the media.
• On the other hand, 'constant voltage' is used for AC bias and as this method does not require
adjustments according to paper width.
Related Advanced Settings
page 30 "Paper transfer current: TE"
Shock-jitter canceller
The shock generated and the change in speed when the leading edge enters and the trailing edge exits
the nip between the PTR [9] and ITB bias roller [7] may cause image quality problems where unwanted
lines appear perpendicular to the paper feed direction (shock-jitter).
To ease the shock, the PTR unit is equipped with the "shock-jitter canceller" function, in which the PTR [9]
moves up when the paper enters the nip and moves down when the paper exits the nip.
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DZH034
Xerographic Process – Belt-to-Paper Transfer
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