Description of Operation
Plockmatic PowerSquare™ 160 - Service Training Workbook
15
• When a set is delivered to the staple position, the clinchers are driven down by a
stepper motor until they contact the set. The steps needed to bring the clinchers
to the paper are counted and used to calculate the thickness of the book. This
data is used by the folder and former to give the correct depth of fold and spine
form.
• When the clinchers touch the set, the staple heads fire. The clinchers then rise to
release the set, which is transported to the folder area.
• An optical sensor in the staple area sees when paper is present. If the sensor
stays covered, then a jam is indicated.
3.6
Fold and Form
• When the set stops in the folder area, the folder blade is operated.
• The folder blade pushes against the centre line of the book - located by the
staples - and folds the book in half. The folder blade pushes the book to a
calculated depth between a pair of fold-rollers and into the form clamp.
• Each face of the form clamp has a horizontal, polyurethane strip that gives a
cushioned grip. The polyurethane strip is important for thin books because the
soft surface prevents the staple cutting through the front and back covers of the
book.
• The folder blade is held in the park position and released when the folder blade
needs to travel downward.
• Drive for the fold blade is by a stepper motor. Drive for the spine form clamp is
provided by the main motor and transferred to a drive shaft by a chain and
clutch.
Figure 12. Exploded diagram of the spine form clamp
• The fold blade retracts and the clamp closes on the book. The form roller rolls
along the spine of the book to create the SquareBack book. The pressure
applied is calculated by the PSQ160 or can be overridden on the touch screen
by the operator.
A
Clamp assembly
B
Form roller
C
Form roller end B sensor
A
B
C
Summary of Contents for Morgana PowerSquare 160
Page 72: ...Glossary of booklet making terms 68 Plockmatic PowerSquare 160 Service Training Workbook...
Page 73: ......
Page 74: ......
Page 75: ......