Description of Operation
Plockmatic PowerSquare™ 224 - Service Training Workbook
7
3.
Description of Operation
After the PSQ is turned on, the operator configures the paper size and direction,
the set-thickness and the number of stitches. The PSQ is controlled by the
printer and by a system of internal sensors.
The PSQ includes these modules
• PSQK - Complete M/C
• PBCK - Bridge Covers
• PRTP - Base Machine
• PBR5 - Rotator
• PBRG - Gathering Area
• PRSH - Shuttle
• PSTI - Stitcher
• PRFD - Folder
• PFRM - Spine Former
• PSTP - Trim Stop
• PTRM - Trimmer
• POFD - Outfeed
• PSTK - Stacker
• PBS - PowerSquare Book Stacker (optional)
• P2T - PowerSquare 2-Knife Trimmer (optional)
Part-number information for these modules is found in the related Illustrated
Parts Catalogues
3.1
Paper Enters the System via the Connecting Bridge
For additional information, see Section 1.7 in the PSQ Service Manual.
When the print job starts, the printer sends a start signal to the PSQ. Paper
leaves the printer and enters the connecting bridge infeed. The paper is moved
through the connecting bridge by belts into the gathering area. When the page
is in portrait format, the paper can be rotated through 90° by the rotator in the
connecting bridge if necessary.
A3 (17 x 11") and A4 (11 x 8½") Landscape jobs move straight through the
bridge without rotation. The turning ball and sidelay are not in the paper path.
The bridge drive belt is parallel to the sidelay.
A4 (8½ x 11") Portrait jobs are rotated around the turning ball. The paper is
driven against the sidelay by the angled, bridge drive-belt. The sidelay makes
sure the paper aligns to the centre reference line of the bridge.
The bridge drive belts are driven by a brushless 3-phase electric motor via a
dedicated controller box in the connecting bridge.
The rotate axis in the connecting bridge is adjusted by a 24V DC electric motor.
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