Registration Operation; Paper Leading Edge Timing Correction Control; Registration Speed Correction Control - Develop ineo+ 6500 Service Manual

Theory of Operation Ver1.0 Sep.2006
18.3.2

Registration operation

• After the specified time passed from when the print start signal is received [1], the loop motor (M31) starts
to turn to rotate the loop roller.
• The paper conveyed from the intermediate conveyance section or the ADU is conveyed to the registration
roller by the loop roller.
• When the registration sensor (PS22) detects the paper front-end, M31 turns OFF after the specified time
passed.
• At this point, because the registration motor (M30) is stopping, the paper is pressed against the registration
roller and forms a small loop [2] before the M31 stops.
• Making paper from a small loop enables to correct skew of the paper.
• The V_TOP signal is generated when the transfer belt becomes ready for the first transfer.
• After the specified time passed from when the V_TOP signal is received, the M30 and M31 stop and carry
out registration.
Paper feed motor (M41)
Registration motor (M30)
Loop motor (M31)
Intermediate conveyance sensor /2 (PS28)
Registration sensor (PS22)
V TOP
[1] Print start signal is received
[2] First sheet registration loop
18.3.3

Paper leading edge timing correction control

• The time period from when the registration motor (M30) starts to rotate until the leading edge sensor (PS63)
detects the leading edge of paper is counted.
• Based on the counted time, the time when the paper gets to the second transfer section is estimated.
• If the estimated arrival time is earlier/later than the proper arrival time, the deceleration timing of the registra-
tion roller and the loop roller line speed is adjusted to meet the arrival timing.
• The timing correction control is carried out for every sheet of paper.
18.3.4

Registration speed correction control

• When restarting registration, the registration roller and loop roller conveyance speed are adjusted according
to the ambient temperature detected by the registration temperature sensor (TEMS1).
• The TEMS1 measures the temperature at regular intervals.
• The speed of the registration speed correction control is the same as normal line speed when TEMS1
detection temperature is 25 °C.
[1]
[2]
[3]
18. REGISTRATION SECTION
[3]
Second sheet registration loop
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