Operation; Fusing Roller Drive Control - Konica Minolta bizhub C35 Service Manual

DRAFT
21. Fusing section

21.3 Operation

21.3.1

Fusing roller drive control

A. Fusing speed switching control
• The main motor provides drive for the fusing section.
• To prevent poor fusing performance, the fusing speed is changed in two steps according
to the media type.
Fusing speed
B. Fusing speed control (control of loop before fusing)
• To prevent double transferred images and brush effects from occurring, the difference
between the fusing speed and the media conveyance speed during image transfer is cor-
rected.
• The media loop sensor detects the length of the loop formed in the media between the
2nd transfer roller and the fusing pressure roller. The fusing speed is then varied accord-
ing to the media size. By varying the fusing speed, media is prevented from being misfed
or contacting the charge neutralizing cloth.
• No loop control is provided to perform the fusing process when envelopes are used (to
prevent wrinkles).
Fusing roller
C. Fusing roller deformation prevention control
• To prevent the fusing roller from being deformed, the fusing roller is forcibly turned if it is
left idle for a predetermined period of time.
• Operation timing
1. If the main body remains in the standby state for more than a predetermined period
of time, the fusing motor is energized for a predetermined period of time.
2. If the main body remains in the power save mode for more than a predetermined
number of days, the temperature adjustment is started. After the temperature rises
to a predetermined value or more, the main motor is energized for a predetermined
period of time.
74
Plain paper (mm/s)
185
Theory of operation Ver. 1.0 Feb. 2010
Thick paper, envelops, gloss paper (mm/s)
92.5
Pressure belt
Media loop sensor (PS6)
Actuator
A0VDT2C559AA