Fusing Speed Control; Fusing Unit New Article Detection - Konica Minolta bizhub C35 Service Manual

DRAFT
21. Fusing section
21.3.4

Fusing speed control

A. PPM control
• The PPM control is performed to inhibit the temperature of the fusing roller from decreas-
ing during a multi-print cycle and the temperatures of the edges of the roller from
increasing.
• Running a multi-print cycle causes the temperature of the fusing roller to decrease, thus
degrading fusing performance of the printed image.
• To prevent this, fusing performance is estimated from the surface temperature of the fus-
ing roller; the distance between sheets of media is then widened according to the length
of the media and the fusing speed, thereby allowing the fusing roller and pressure belt to
recover their temperatures to thereby achieve satisfactory fusing performance of the
printed toner image.
• If a multi-print cycle is run using plain paper of a small size (B5, A5) or thick paper of a
small size (B5, A5, postcards), a difference is produced in temperature between the cen-
ter portion of the roller/belt (the surface over which the media moves past) and the edges
of the roller/belt (where no part of the media moves past). To inhibit this situation, the dis-
tance between sheets of media is widened and the temperature of the fusing roller is
thereby made uniform.
• The PPM control is also performed during a two-sided print cycle to produce a predeter-
mined number of printed pages or more continuously.
Only the plain paper (A4, Letter, B5) is subject to this control.
21.3.5 Fuser unit new article detection
• The fuser unit is not provided with any new article detection mechanism.
• If the fuser unit is replaced with a new one, therefore, the counter needs to be reset by
using the [Consumables Replace] function of the user mode or service mode.
• Reference (user mode): [Admin Settings] / [Maintenance Menu] / [Supplies] / [Consum-
ables Replace] / [Fusing Unit] menu
• Reference (service mode): [SERVICE MODE] / [Supplies] / [Consumables Replace] /
[Fusing Unit] menu
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Theory of operation Ver. 1.0 Feb. 2010