WARNING: Always unplug machine before attempting any
troubleshooting or maintenance on the machine.
Checking the Board Sensor: There are several reasons why the
machine will prompt the user to "Check the Board Sensor".
o There is dust obscuring the sensor. Please see the next section
titled "Cleaning of the Board Sensor" for details on how to address
this situation.
o There are existing features on the workpiece, like holes or other
carved features, which prevent the sensor from tracking the top
surface. This can be fixed by placing a piece of masking tape over
the feature.
o The material is too transparent or reflective. This can be fixed by
placing a piece of masking tape on the surface of the workpiece
along the line that the sensor traces while measuring. This
generally requires placing tape across the width and length of the
workpiece.
Cleaning of the Board Sensor: From time to time the sensor that
locates and measures the workpiece can become obscured by dust.
The sensor system consists of an infrared LED and an infrared
detector. The board sensor works by reflecting infrared light off of the
board, and reading the intensity of the reflection. When the board is
underneath the sensor, the reflected intensity is high and when the
sensor is the board, the intensity is low. The LED and detector are
mounted behind a clear window in a plastic case at the bottom of the
Horizontal Moving Truck (Y-Truck). If cleaning is required, the
machine LCD will display Please Clear Board Sensor. To clean,
simply blow onto the sensor window with compressed air or wipe with
a clean cloth. It is recommended that this sensor and mirror be
cleaned after every project.
Board Edge Top Compression
Sensor
I
FIGURE 28: BOARD SENSOR CLEANING
Sears, Roebuck and Co. CompuCarve TM System (Rev 1.13) 01/06/07 36
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