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TECHNICAL SPECIFICATIONS |
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Registration Accuracy: |
1/16"
(1.5 mm) or Less
From Registration Mark |
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Marks
Detected: |
Non-Keyed Watermarks
Keyed Watermarks
Printed Watermarks
Other Marks Subject to Tests |
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Maximum
Web Speed: |
Depending on Application |
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Dimensions: |
Rack
Mounted |
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Material Color Range: |
Subject
to Tests |
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Material Color Range: |
Subject
to Tests |
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Illumination: |
Proprietary |
|
Ambient
Temperature: |
40 to
160° F (4 to 70° C) |
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Power:
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110/220/240 VAC
50/60 Hz
Single Phase |
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Specifications are subject to change without notice.
Note:
The Register Control System supplies all necessary
electronics and controls with the exception of the
double differential in the drive of the rotary
knife. The double differential is supplied by the
cutter manufacturer. |
 Insure Material
Registration:
The Dandy Roll Control™
Technology
automatically controls the application of all types of
watermark, bug mark and security marks to ensure consistent
application of such marks prior to further processing.
Through system integration with production equipment, THE Dandy Roll Control™ Technology is adapted to specialized applications to ensure in-register processing of web materials. It is
suitable for many types of watermark processing in writing, text, cover,
security and private authorization registration or similar process controls.
 Detect Any Mark:
Since register mark
variations are inevitable due to temperature, humidity, web expansion
and contraction, it is very
important to implement a proportional
closed loop methodology as constant dandy roll speed cannot compensate
for mark spacing. Our proprietary drive control circuitry enables
us to control the rotational speed of the dandy roll. This
determines the linear spacing of the watermark and/or bug marks along
the web at the wet end of the machine in comparison to the measured mark
spacing at the take up end. Upon detection of the in-register
marks, their spacing is measured, displayed and compared to an operator
adjustable set point. If there is any variations an error signal
is generated and inputted into the closed loop methodology for feedback
signal response to close the control loop upon application.
 The SLC module
(sheet length control) must function with a large transport
delay due to the time required for the web material to travel
the length of the machine. This could be 30 seconds at a
machine speed of 900 fpm (xxx m/min). This delay is the
time differential when the feedback signal response is applied
to the dandy roll drive controls and its affect is monitored by
the take up sensor.
For example, a machine
operating at 900 fpm (xxx m/min) travels 180 inches per second
(00cm/second) and has a mark placement every 72 inches (00cm)
thus generating a 400 millisecond mark spacing.
Theoretically, a new measurement, reading and correction can be
provided every 400 milliseconds. However, this is not
necessary nor desirable since the transport delay is 30 seconds.
Temperature, humidity or other environmental conditions causing
the in-register mark error at the take up sensor station occur
very gradually over a relatively long period of time, 30 minutes
or so. Therefore by slowing the process error anomalies
down to several transport delays, the drive controls will have
sufficient time with minimal stress to catch up and reduce the
error to zero (measurement equaling the set point). By
implementing this type of methodology, our register control technology is compatible with a wide
range of illumination, sensing, and signal processing technologies for detection of any
type of mark including keyed and none-keyed marks.
 Improve Delivered Quality:
The
Dandy Roll Control™ Technology can help your company improve product quality
by automatically controlling material registration within customer specifications. Choose
our Dandy Roll Control™ Technology for faster, more reliable, control of the
delivered quality of your products.
Reduce Costs:
Our
Dandy Roll Control™ Technology will help you
to significantly reduce your company's
costs for producing, sorting, and disposing of mis-registered products. They can also help
to reduce costs for machine downtime and customer returns.
Achieve High Speed Operation:
A pulse generator, combined with our illumination, sensing, and signal processing
technologies, ensures that registration accuracy is maintained throughout the process at
any process speed. Since the pulse generator is integrated with a
machine driven shaft,
registration accuracy is not speed dependent.
Call SDS:
Call us
today
to discuss your
register control application and to learn more about the
industry's most complete line of web inspection related products.
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