Detailed Section Descriptions; Pick-Up And Separation; Clutch Operation; Transport And Exit - Gestetner B130 Service Manual

PICK-UP AND SEPARATION

2. DETAILED SECTION DESCRIPTIONS

2.1 PICK-UP AND SEPARATION
[C]
The ADF uses an FRR (Feed & Reverse Roller) system.
Setting paper lowers the feeler [A], causing the original set sensor [B] to inform the
CPU that the ADF is ready to feed.
Press ! → short time lag → DF feed clutch engages → DF motor starts.
The motor drives the DF pickup roller, DF feed roller, DF separation roller, and
transport rollers. The pickup roller drives the top sheet(s) between the feed and
separation roller, where the top sheet is separated and fed to the transport rollers.

2.2 CLUTCH OPERATION

The DF feed clutch is provided to stop feeding in the event of a jam. During jam-
free operation the clutch remains activated for the entire feed cycle. In the event of
a jam the clutch disengages (by torque limiter).

2.3 TRANSPORT AND EXIT

During pickup and feeding of the first sheet, the scanner moves to carry out white
adjustment and then scanning correction.
A short time after the sheet reaches the original registration sensor [C], the DF
motor stops briefly, the scanner moves to DF scan position, and the white peak is
read. The DF motor then restarts and the sheet is scanned. The exit roller ejects
the sheet.
Features of the transport mechanism:
• White peak is read for each sheet. If timing allows, the DF motor continues
running while the peak is read between consecutive trailing and leading edges.
If timing does not allow, the DF motor stops and then restarts.
• Shading correction is repeated every 10 sheets. The DF motor must stop and
restart to carry out this correction.
• Following feeding of the last sheet, the DF motor reverses briefly, raising the
pickup roller.
B444
CÓPIA NÃO CONTROLADA
[A]
[B]
4
CÓPIA NÃO CONTROLADA
B444V102.WMF
SM