2. Plates are stepped across the cylinder, referenced
from the web (cylinder) centerline in X direction
-X +X
3. Plate X locations across cylinder
Cylinder X
reference =0
Plate 2
X= +635mm
Plate 1
X= -635mm
NOTE THAT PLATE X MOUNTING
LOCATION IS CENTER OF PLATE
4. Likewise, the Y location around the cylinder is
referenced from the cylinder zero (scribe/keyway).
Plate Y zero is the center of the plate and is the
mounting point of the plate (X0,Y0).
0 º
90 º
180 º
270 º
Plate Y Zero is
center of the plate
Cylinder Zero
reference.
Locations for plate mounting on
the cylinder are by
circumferential distance.
5. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
6. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
7. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
8. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
9. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
10. The Leader Mounter looks at the cylinder
mounting locations in the Y as if the cylinder
circumference were opened and laid out flat
11. The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
X0,Y0
12. X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
13. Plate mounting location
on cylinder = X0,Y0
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
14. Plate mounting location
on cylinder = X0,Y-254
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
15. Plate mounting location
on cylinder = X0,Y+455
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
16. Plate mounting location
on cylinder = X0,Y0
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
17. Plate mounting location
on cylinder = X-250,Y0
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
18. Plate mounting location
on cylinder = X+250,Y0
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
19. Plate mounting location on
cylinder = X+250,Y-300
Plate X0,Y0
X
Y
The Leader Mounter looks at the cylinder mounting
locations as if the cylinder circumference were
opened and laid out flat with center as X0,Y0.
20. Plate mounting location on
cylinder = X-250,Y+300
X
Y
Two plates across and two plates around.
Plate mounting location on
cylinder = X+250,Y+300
Plate mounting location on
cylinder = X-250,Y-300
Plate mounting location on
cylinder = X+250,Y-300
21. We now know how the plate location on the
cylinder is determined, but how is the plate
center determined by the mounter?
The center is known because the registers are referenced
from the center of the plate. Thus the register X,Y location
tell us the center of the plate.
X+280, Y0X-280, Y0
Plate center X0, Y0
22. The Leader mounter adds a new feature to
mounting by permitting registers to be located
anywhere on the printing plate. Also the register
do not have to overlap between colors.
X+320, Y-300X-280, Y280
Plate center X0, Y0
23. This saves the customer consider plate material cost
by making plates only large enough to contain the
graphics. That is, all plates do not have to be the same
size for the sake of overlaying registers.
Parrot food
Conventional method Leader method
Parrot food
24. We have seen how the Leader mounter uses
two register locations and the cylinder
location for mounting.
The plate length is also required for mounting
to estimate Y0 of the plate. X0 is known
since the plate center is placed at the
approximate table center in the X direction.
The following Leader mounting process
explains this in more detail.
25. The unique design and operation of the LeaderThe unique design and operation of the Leader
Vision System Mounter making it all possible.Vision System Mounter making it all possible.
26. A Snapshot of the Mounting ProcessA Snapshot of the Mounting Process
Putting details aside for now, let us look at thePutting details aside for now, let us look at the
basic concept ofbasic concept of no hands alignment andno hands alignment and
mountingmounting with the Leader Vision Systemwith the Leader Vision System
27. The operator places the printing plate reasonably
straight at the approximate center of the table.
28. When ready, a wide angle camera
moves to the first register
29. When ready, a wide angle camera
moves to the first register
30. When ready, a wide angle camera
moves to the first register
31. When ready, a wide angle camera
moves to the first register
32. The operator verifies the approximate register
location with a point and click of the mouse.
33. When ready, the telephoto camera
moves to the first register
34. When ready, the telephoto camera
moves to the first register
35. When ready, the telephoto camera
moves to the first register
36. When ready, the telephoto camera
moves to the first register
37. When ready, the telephoto camera
moves to the first register
55. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
56. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
57. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
58. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
59. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
60. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
61. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
62. The pressure roll automatically lowers to firmly
apply the printing plate to the cylinder.
63. Mounter shown with the pressure roll in the downMounter shown with the pressure roll in the down
position. The weight is distributed across the plateposition. The weight is distributed across the plate
The mechanism above the pressure roll moves the pressure
roller laterally to keep it supported on the cylinder when the
table is positioned to mount plates toward the cylinder edges.
64. The front section of the plate table and
roller automatically pivot to apply the
front of the plate to cylinder
65. The front section of the plate table and
roller automatically pivot to apply the
front of the plate to cylinder
66. The front section of the plate table and
roller automatically pivot to apply the
front of the plate to cylinder
67. The mounter shown with the pressure roll pivotedThe mounter shown with the pressure roll pivoted
forward to mount the front edge of the plateforward to mount the front edge of the plate
The front portion of the plate is transferred
from the plate table to the cylinder.
68. The front section for the plate table
and roller automatically pivot back
with roller slightly raised
69. The front section for the plate table
and roller automatically pivot back
with roller slightly raised
70. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
71. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
72. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
73. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
74. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
75. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
76. Pressure roller again automatically lowers to the
printing plate and the cylinder turns to firmly
mount the printing plate without air bubbles.
83. You are now ready to set and mount the next plate.
84. The Leader Vision System Mounter reads theThe Leader Vision System Mounter reads the
job database tojob database to recall and mount platesrecall and mount plates..
Mounting JobsMounting Jobs
Database StorageDatabase Storage
Mounting jobs viewer and selectorMounting jobs viewer and selector
Mounting jobsMounting jobs
data sourcedata source
• Plate sizesPlate sizes
• Register locationsRegister locations
on plateon plate
• Plate locationsPlate locations
on the cylinderon the cylinder
• Job number andJob number and
descriptiondescription
85. How the Leader Vision System MounterHow the Leader Vision System Mounter
calculates the plate location on the tablecalculates the plate location on the table
1. Approximate Y1. Approximate Y
location of plate islocation of plate is
known from leadknown from lead
edge located at aedge located at a
fixed mounterfixed mounter
scribe line.scribe line.
2. Approximate X location2. Approximate X location
(center) of plate known by(center) of plate known by
approximate center placement.approximate center placement.
3. Register positions3. Register positions
from center of platefrom center of plate
are known from theare known from the
job database.job database.
4. The computer can now4. The computer can now
calculate register locationscalculate register locations
on table and move the wideon table and move the wide
angle camera to them.angle camera to them.
86. The wide angle camera moves to theThe wide angle camera moves to the
approximate location of the register and theapproximate location of the register and the
operator verifies the register proximity.operator verifies the register proximity.
87. Knowing the first register location, the 70xKnowing the first register location, the 70x
magnification camera automatically moves to thatmagnification camera automatically moves to that
register for determining the precise register center.register for determining the precise register center.
88. The camera steps are repeated for the secondThe camera steps are repeated for the second
register and the mounter now knows the real worldregister and the mounter now knows the real world
X and Y location of both registersX and Y location of both registers
89. The computer compares the angle of the art workThe computer compares the angle of the art work
registers (in job database) to the actual cameraregisters (in job database) to the actual camera
measured angle and rotates the plate accordinglymeasured angle and rotates the plate accordingly
Rotating table
90. The computer calculates the rotated registerThe computer calculates the rotated register
positions, and the 70x camera moves to each,positions, and the 70x camera moves to each,
visually verifying the rotation to the operator.visually verifying the rotation to the operator.
91.
92. The computer calculates position of the registerThe computer calculates position of the register
locations after rotation, and the 70x cameralocations after rotation, and the 70x camera
moves to them, visually verifying the rotationmoves to them, visually verifying the rotation
93.
94. The computer knows the location of plate center becauseThe computer knows the location of plate center because
register X,Y locations are referenced from the center.register X,Y locations are referenced from the center.
The computer knows the plate mountingThe computer knows the plate mounting
location on the cylinder from cylinder X,Ylocation on the cylinder from cylinder X,Y
location in the job database.location in the job database.
From these twoFrom these two
locations thelocations the
computer cancomputer can
position the plate toposition the plate to
the proper locationthe proper location
across the cylinderacross the cylinder
How the mounter knows where to place the plateHow the mounter knows where to place the plate
on the cylinderon the cylinder
95. The table moves to the X mounting location basedThe table moves to the X mounting location based
upon the actual plate location and the cylinder Xupon the actual plate location and the cylinder X
mounting location given in the job database.mounting location given in the job database.
96. Based upon the job cylinder Y (around) mountingBased upon the job cylinder Y (around) mounting
location, the computer calculates and rotates thelocation, the computer calculates and rotates the
cylinder to the position where the plate center will meetcylinder to the position where the plate center will meet
that location (270 º in this case), as shown in next slide.that location (270 º in this case), as shown in next slide.
0 °
90 º
180 º
270 º
Plate Y zero
Length of plate
in Y direction
97. Here you can see that when the cylinder is brought up toHere you can see that when the cylinder is brought up to
“kiss” the plate and then rotated to pull off the plate, the“kiss” the plate and then rotated to pull off the plate, the
center of the plate will meet the required mountingcenter of the plate will meet the required mounting
location oflocation of 270 º270 º..
270 º
0 º
90 º
180 º
Plate Y Zero Distance = circumferencial
cylinder (at sticky back)
distance (distorted)
98. Here you can see that when the cylinder is brought up toHere you can see that when the cylinder is brought up to
“kiss” the plate and then rotated to pull off the plate, the“kiss” the plate and then rotated to pull off the plate, the
center of the plate will meet the required mountingcenter of the plate will meet the required mounting
location oflocation of 270 º270 º..
270 º
0 º
90 º
180 º
Plate Y Zero Distance = circumferencial
cylinder (at sticky back)
distance (distorted)
99. Here you can see that when the cylinder is brought up toHere you can see that when the cylinder is brought up to
“kiss” the plate and then rotated to pull off the plate, the“kiss” the plate and then rotated to pull off the plate, the
center of the plate will meet the required mountingcenter of the plate will meet the required mounting
location oflocation of 270 º270 º..
270 º
0 º
90 º
180 º
Plate Y Zero Distance = circumferencial
cylinder (at sticky back)
distance (distorted)
100. Here you can see that when the cylinder is brought up toHere you can see that when the cylinder is brought up to
“kiss” the plate and then rotated to pull off the plate, the“kiss” the plate and then rotated to pull off the plate, the
center of the plate will meet the required mountingcenter of the plate will meet the required mounting
location oflocation of 270 º270 º..
270 º
0 º
90 º
180 º
Plate Y Zero Distance = circumferencial
cylinder (at sticky back)
distance (distorted)
101. Here you can see that when the cylinder is brought up toHere you can see that when the cylinder is brought up to
“kiss” the plate and then rotated to pull off the plate, the“kiss” the plate and then rotated to pull off the plate, the
center of the plate will meet the required mountingcenter of the plate will meet the required mounting
location oflocation of 270 º270 º..
270 º
0 º
90 º
180 º
Plate Y Zero Distance = circumferencial
cylinder (at sticky back)
distance (distorted)
102. Summary of Leader Vision SystemSummary of Leader Vision System
Mounter coordinate systemMounter coordinate system
Cylinder Y axis (zero point in
position for plate pick-up)
Plate X axis
Y axis zero for cylinder
and plate in this instance
Right Register X = 10, Y = 0
from center of plateLeft Register X =
-10, Y = 0 from
center of plate
X +X -
Y -
Y +
Cylinder mounting X zero
Registers at Y zero
(center of plate)
Direction of Motion
103. Proofing with the Leader Vision System MounterProofing with the Leader Vision System Mounter
104. After each plate is mounted, the vision system cameraAfter each plate is mounted, the vision system camera
automatically moves to the expected register locations,automatically moves to the expected register locations,
calculated from the job register and plate locations.calculated from the job register and plate locations.
105. Once in position, the camera automatically snaps andOnce in position, the camera automatically snaps and
displays a picture of the register. The center is confirmeddisplays a picture of the register. The center is confirmed
with a mouse point and click and the error is displayed.with a mouse point and click and the error is displayed.
In this instance, the X distance
error is shown as .0004 and the
Y distance error is 0.
Each small tick mark
is .001” or .0254 mm
or 25.4 microns
The error is
automatically
recorded for
this plate in
the proofing
history
database
Distance
measuring
tool
106. Job proofing history (deviations) is saved in the proofJob proofing history (deviations) is saved in the proof
database for immediate or future viewing.database for immediate or future viewing.
Job selection
showing mounting
start date and time
Mounted plate register
deviations from desired location
Rotated plate register deviations prior
mounting; to diagnose art or plate error
The proof data can be
visually analyzed
107. The visual proof analysis constructed from actual registerThe visual proof analysis constructed from actual register
deviation data in the proof history database, showingdeviation data in the proof history database, showing
overlaying register pairs for all decks (plate by plate).overlaying register pairs for all decks (plate by plate).
.005” ticks
.001” ticks
Visual analysis of
overlaying register
deviations from the
desired mounting location.
Registers are shown in
actual deck colors.
Actual measured
register deviation in
X and Y direction.
Total deviation of
both registers = plate
deviation. This error
is not important if the
error is nearly the
same for all.
First
Register Second
Register
Sequence through plates
108. Another example of the visual proof analysis tool.Another example of the visual proof analysis tool.
Registers
clustered within
+/- .0025”or less
Registers clustered on
the opposite side of
center tells you that
actual distance is
shorter than entered in
Job Manager.
109. More on the job proof analysis tool.More on the job proof analysis tool.
This demonstrates
deviation in
artwork, plate
making and/or
plate shrinkage,
since these
registers are not
clustered like those
at the left.
Note that actual registers would be at least ten tick
marks wide (.01”), thus this tool provides much
greater clarity and resolution than conventional ink
proofing.
110. The Leader Vision System MounterThe Leader Vision System Mounter
Clearly, the next generation of mounters to meet theClearly, the next generation of mounters to meet the
tolerances of today’s presses.tolerances of today’s presses.
