Feed Pressure Adjustment; Effect Of The Amount Of Remaining Paper - Ricoh R-C4 Service Manual

21 July 2006

Feed Pressure Adjustment

The pressure can be adjusted to solve a paper feed problem. This adjusts the
amount of lift motor reverse just after the lift sensor is activated when lifting the
stack to the paper feed position. To apply less pressure to the top of the stack, the
amount of reverse should be increased.

Effect of the Amount of Remaining Paper

Feed Pressure
2
0
50 sheets
(Near-end)
From tray full to paper near-end
The pressure between the top of the stack and the fed roller also depends on the
amount of remaining paper, especially for small paper sizes, as shown in the above
graph. The pressure for A5 changes significantly between stack heights of 500
sheets and 50 sheets, but not much for A4 or A3 paper.
For 500 sheets of A5, the pressure is too high. To counter this, the lift motor
reverses 600 ms (
modes in the following table are for solving feed problems that occur when the tray
is between full and near-end.
Paper Size
1st paper tray
2nd paper tray
3rd paper tray
4th paper tray
Default (all trays)
25 %
3
in the graph), as explained in the previous section. The SP
Normal
Greater than HLT/A5
(default setting)
SP1908-1
SP1909-1
SP1910-1
SP1911-1
200 ms
A5 size
A4 size
A3 size
75 % 500 sheets
Small Size
HLT/A5 or smaller
(default setting)
SP1908-2
SP1909-2
SP1910-2
SP1911-2
600 ms
6-67
PAPER FEED
1
Paper
Amount
B205D943.WMF
Middle Size
None
(default setting)
SP1908-3
SP1909-3
SP1910-3
SP1911-3
200 ms
(default: not used)