Drive rollers for future use.
26
Exit photocell.
PH10
Document feeding
The system has feeders with automatic separation.
For the documents to be fed the following rules apply:
• Documents with the fold types single fold, letter fold, and double parallel fold must be fed with the orientation
face up and leading. The address carrying document is to be fed by the highest active feeder.
• Documents with the fold type zigzag fold must be fed with the orientation face down and trailing. The
address-carrying document is to be fed by the lowest active feeder.
The feeding process
• A document is separated by 79 - 81 (feeder 3), 72 - 74 (feeder 2) or 65 - 67 (feeder 1).
• The document is exited to the vertical track by 77 and 78 (feeder 3), 70 and 71 (feeder 2) or 63 and 64 (feeder
1).
• The paper transport is monitored by the feeder photocell PH3 (feeder 3), PH2 (feeder 2) or PH1 (feeder 1).
• The thickness is measured by the thickness measuring unit (DFC unit) DFC3 (feeder 3), DFC2 (feeder 2) or
DFC1 (feeder 1).
• The feeders are mechanically driven from the main motor M2 by a clutch (feeder clutches CL1 - CL3).
Document transport
Depending on the number of documents to be delivered by each feeder there are two ways in which documents
can be transported along the vertical track: pane cycle and sequential cycle.
• Pane Cycle: The various documents of a set are fed from the feeders in such a way that these documents
are partly overlapping each other. This pane-like overlapping ensures a higher throughput.
• Sequential Cycle: Documents are transported along the vertical track without touching each other. Only after
joining the set in the making they do touch each other.
The transporting area
• The vertical track consists of one driven axle per feeder (75, 68, 61), plus one driven axle in the lower vertical
track (45).
• All these axles carry two rollers, except for 75 (at the top feeder), which carries four rollers. This is necessary
for straightening the paper prior to passing the optional reading head.
• The driven rollers have their counterparts in rollers 76, 69, 62 and 44.
• If the OMR option is installed, the paper transport prior to entering the reading head located directly below
PH4) is monitored by the reading head photocell (PH4). This monitoring is necessary for establishing the
reading window.
Collating the document set
The following rules apply to the way in which a set is collated (i.e. composed):
• The highest active feeder is processed first, the lowest active feeder last. This is independent of the fold type.
• If a feeder adds two or more documents to a set (multi-feeding), these documents are first of all processed
in the order in which they are separated from the feeder hopper.
Based on the actual number of documents from each cycle, the system composes a set based on the minimum
amount of cycles and, if possible, a pane cycle in stead of a sequential cycle (see Section 3.4.2 “Document transport”).
In the case of multi-feeding of ’n’ documents from the same feeder there are always at least ’n-1’ sequential cycles
involved. In the case of OMR processing the document(s) from feeder 3 is/are always processed via sequential
cycles.
Shunting
Shunting is necessary between two successive cycles of the collating process, before a new document joins a
partially completed set. During shunting, the partially completed set in the collator is moved from the collator area
in the direction of the fold unit (short shunt). This is necessary to prevent the paper entering from the vertical track
from interfering with the partially completed set.
3
063.1
Service
Guide
17
Summary of Contents for 6204 Series
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