Machine Areas
22
Plockmatic PowerSquare™ 224 - Service Training Workbook
8.5
Shuttle - Book Transport
The set is collected by the shuttle and moved to the 1st stitch position. A cam
mechanism tightens the shuttle pick-up fingers on the set when the shuttle
moves towards the 1st stitch position. The increased hold makes sure the
pages remain in alignment when the set is stitched. The rear or large shuttle
pick-up fingers incorporate rollers to prevent toner deposition that could mark
the covers of the books.
The set is stitched, then moved by the shuttle to the next stitch position. This
process is repeated as necessary to a maximum of 6 stitches. When set to
AUTO, the PSQ automatically calculates the stitch positions. The user can
change the stitch pitch within certain limits. This function can be used to give a
clearance between the stitches and the print on the spine of the book.
The set is moved to the folding area when the set is stitched. When the shuttle
moves to the folding area, the pick-up fingers loosen on the book.
The shuttle is driven by a 230V AC electric motor, Shuttle Servo Motor, through
a linear transmission.
Locate the following in the Shuttle Chassis - Bottom :
Shuttle Axis Motor Control PCB (900-212)
Shuttle Interface PCB (900-216)
Shuttle Axis Motor
Shuttle Servo Motor
Shuttle proximity sensor
Locate the following in the Shuttle Chassis - Top
Shuttle Axis Home Switch
Paper Position Optical Sensor
Shuttle Jog Clutch
Manual Operation Switches
Perform the following:
ADJ 4.5.13 (Check the Shuttle Pick-up Fingers for Square)
ADJ 4.5.14 (Check and Calibrate the Shuttle Pick-up Fingers)
ADJ 4.5.16 (Check and Adjust the Shuttle Pick-up Position Calibration)
Use the RAPs to diagnose and repair the problem created by the trainer.
Machine Areas
Plockmatic PowerSquare™ 224 - Service Training Workbook
27
8.8
Trim
The book passes between two facing sets of conveyors in the trimmer infeed.
These conveyors move the book to the trim stop.
The distance of the trim stop from the trimmer blade is calculated by the PSQ
according to the size of the job. The PSQ applies an amount of trim according to
the size of the paper. The operator can change the amount of trim from the
touch screen if necessary.
The trim clamp and trimmer blade
move forwards in one action to hold and trim
the book. The trim clamp and trimmer blade then return to their start position.
Offcuts are pushed into the trim bin by flexible fingers on one of the trimmer
infeed conveyor shafts.
The trimmer uses a chevron blade to apply balanced cutting pressure across
the width of the book. The chevron blade decreases to a minimum the shear
forces.
The drive for the trimmer blade and the trim clamp is transferred from the main
electric motor by a chain and clutch system. Rotary movement is changed to
linear movement with a crank mechanism.
Locate the following in the Trim Stop:
Trim Stop Axis Home Switch
Book at Trim Stop Optical Sensor
Trim Stop Guard Switch
Trim Stop Axis Motor Control PCB (900-212)
Trim Stop Axis Motor
Trim Stop Solenoids
Locate the following in the Trimmer:
Tacho - Magnet Ring Encoder
Hall Effect Switch
Trim Bin Full Optical Sensor
Trim Blade Proximity Switch
Bin Guard Switch - 1
Bin Guard Switch - 2
Trimmer Interface PCB (900-214)
Stacker Interface PCB (900-227)
Trimmer Clutch
Eject Roller Clutch
