AccuWeb MICRO 4000 NET, Instruction Manual

Page: 61 / 155

Calibration
The compensated ultrasonic, infrared (IR), and Hi-Temp edge detectors may be calibrated to
guide materials that are between 15% and 100% opaque to the detectors’ sensing beam. During
the calibration procedure the microprocessor records the signal level twice: once with the sensing
beam unblocked, and then a second time with the sensing beam blocked by the material. After
recording the signal levels the microprocessor calculates the opacity of the material and then
displays it on the data display. When guiding a variety of materials with different opacities, best
results are usually achieved when the system is calibrated for the material with the lowest
opacity. Unless otherwise specified, the system is calibrated at the factory for materials with
100% opacity, and this setting is correct for most materials. The following procedure should be
performed when unacceptable guiding occurs. Materials with an opacity reading lower than 15%
may be guided with acceptable results but sensor resolution will decrease.
Ultrasonic, Infrared, and Hi-Temp Edge Detector Calibration Procedure:
Note: Refer to page 17 for more information about setting controller parameters.
1) Put the system in either Manual or Servo-Center mode.
2) Make sure that the detector is enabled by setting parameter 12, 13, or 49 to 1. The default
settings are: detector A enabled, detector B disabled.
3) Clear any obstruction or web material from the detector gap.
4) Set the number on the CODE display to 20 (for detector A), or 21 (for detector B).
5) Set the number on the DATA display to 1 and press the ENTER button. While calibration is in
progress the display will count down several times (calibration may take up to a minute with
larger WideArray detectors). When done the display will show a number between 100 and
204 for several seconds, followed by a 0 to prompt the next step.
6) Place the web material that is being calibrated in the detector gap and completely cover the
transducer area. If calibrating a Hi-Temp detector, cover the open ends of the waveguide
tubes with the web material.
Important: Keep the web material at least 0.25 inch [6 mm] from either transducer during
calibration.
7) Set the number on the DATA display to 2 and press the ENTER button. The display will show
a number between 0 and 100 for several seconds. This number represents the opacity of the
web material.
8) Remove the web material from the detector and wait for 15 seconds before guiding.
The edge detector is now calibrated.
PointSource™, WideArray™, and Hi-Temp Edge Detectors 58
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