Paper Empty Control - Konica Minolta bizhub 500 Service Manual

Theory of Operation Ver1.0 Feb.2006
B. Separation mechanism
The separation roller [7] is pressed against the feed roller [1] by the operating pressure generated by the pres-
sure [4] of the spring [5] and the torque of the torque limiter [6]. This operating pressure of the feed roller, sepa-
ration roller and torque limiter becomes a limit torque to prevent the double feed of paper.
When there is no paper between the separation roller and the feed roller, or when only one sheet of paper is con-
veyed, the operating pressure of the feed roller, the paper and the spring is in excess of the limit torque, and
therefore, the separation roller rotates [3] following the rotation of the feed roller.
When two or more sheets of paper are conveyed between the separation roller and the feed roller, the limit
torque is greater than the frictional force between 2 sheets of paper, and accordingly, the separation roller stops
and the lower side paper [2] in contact with the separation roller is not conveyed.
[7]
[6]
[5]
[1] Feed roller
[2] 2nd sheet of paper
[3] Driven rotation
[4] Pressing
15.3.4

Paper empty control

The paper empty of the tray is detected by the paper empty sensor /BP (PS18).
[8]
[4]
[1]
[3]
[5] Spring
[6] Torque limiter
[7] Separation roller
[8] Paper conveyance direction
15. BYPASS SECTION
[2]
50gat2c106na
55