Curl Correction Mechanism; Cpm Down Determination Using A Temperature Sensor; Cpm Down Determination Using Paper Passage Time - Ricoh MP C3004 Field Service Manual

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• The down level % is a value for the case where a typical paper (Normal paper: A3/A4)

passes through the SEF. There may be some differences depending on paper size/paper

The temperature sensor is checked at given intervals, and if the detection temperature is above a

threshold value, the CPM is decreased by 1 level.

Since the points at which temperature tends to increase depend on the paper size, the sensor used

is changed depending on the paper size.

Paper width (length)

Depending on the paper size, it may not be possible to determine the points on the fusing belt

which tend to rise in temperature by a sensor.

Therefore, time conditions are also used to determine CPM down, and if continuous paper passage

time is above a threshold value, CPM is decreased by 1 level.

(When CPM down is performed by time conditions, CPM does not increase thereafter.)

Curl Correction Mechanism

This machine provides a curl reduction mechanism on the fusing exit.

Pressure roller thermistor (edge)

Thermopile (edge)

Pressure roller thermistor (center)

Check sensor

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