Watkiss Automation Plockmatic PowerSquare 224, Рабочая тетрадь

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Machine Areas
Plockmatic PowerSquare™ 224 - Service Training Workbook
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8.6 Stitcher
The shuttle collects the set between the pick-up fingers and moves to the first
stitch position. When the book is stitched and moved to the next stitch- position,
the previous stitch moves across a stitch sensor. The Stitch Detect Sensor
detects the steel of the stitch wire. If this sensor does not detect a stitch, a stitch
head fault is indicated and production is stopped.
When the book is stitched correctly, the book is moved by the shuttle to the fold
position. If a book remains over the optical Stitch Jam Sensor
next to the stitch
head, a jam is indicated and the PSQ is stopped. If the stitch head jams, a Stitch
Head Jam Sensor stops the machine. The Stitch Head Jam Sensor is fitted next
to the clincher cam and is connected to the Stitch Sensor PCB.
The size of stitch or 'wire draw' setting is calculated from the thickness of the
paper and the number of sheets in the set or from the set-thickness input by the
operator.
Adjustment is made to the 'wire draw' by the PSQ. This automatic adjustment
makes sure the correct size of stitch is formed for every thickness of book. The
single stitch head is a custom version of the Deluxe G8 stitch head. The stitch
head is installed vertically and upside down. The stitch head and clincher are
aligned to the centre reference line of the PSQ. The book is moved to each
stitch position by the shuttle.
The clincher is held in a frame above the stitch head. The PSQ uses a clincher
with moving points. The clincher forms a high quality stitch that lies flat against
the book.
Drive for the stitch head and clincher operation is transferred from the main
motor by a system of chains, shafts and clutches.
The stitch head vertical-axis adjustment is made by a stepper motor.