Originally Posted by
waynedazey
Alright I just changed the qc chuck and took every piece of advise that has been given to date! NOW the machine keeps saying clear board sensor. I have cleaned the edge sensor with air, vaccuum, and alcohol, yet still clear board sensor edge sensor error??????????????
What next????
Please Clear Board Sensor Message
Description of Issue
This error appears when the sensor used to find the edges of the workpiece is not seeing reading
within its operational limits. 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 off the edge of 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 YTruck.
Possible Causes
There are several reasons why the machine will prompt the user to “Clear Board Sensor”
including:
1. There is dust obscuring the sensor lens.
2. There is dust piled in the machine to the right of the board that looks like a continuation of
the board to the sensor.
3. There are existing features on the workpiece, like holes or other carved features, which
prevent the sensor from tracking the top surface.
4. The material is too transparent or reflective.
5. The board is positioned incorrectly in the machine; usually the board is installed on top of
the squaring plate instead of up against it. It will also give this error if the board is placed
in the middle of the machine and not slid up against the strongback.
6. The environmental temperature is below 40 degrees Fahrenheit.
Troubleshooting Steps
The following steps only touch on the most likely causes of this issue. For an in-depth
troubleshooting procedure please consult the detailed trouble shooting document titled “Please
Clear Board Sensor”
1. Clean the Board Sensor. The most common reason for this issue to occur is that the sensor
is obscured by dust. To clean, simply blow low-pressure compressed air (<80 psi) onto the
sensor window or wipe with a clean cloth. It is recommended that this sensor be cleaned
after every project. If using pressurized canned air make sure to keep the can vertical. If
the can is tipped upside down it will eject a stream of freezing liquid instead of air. This
will usually damage the sensor.
2. Verify that the temperature is above 40
oF.
3. Verify that the board is pushed up against the squaring plate and not riding on top of it.
4. Check to see that there is no dust piled on the squaring plate that may trick the sensor.
5. Verify that there are no existing features on the workpiece, like holes or other carved
features, which trick the sensor into thinking that it has found the edge and preventing it
from seeing the entire top surface of the board. Use masking tape to hide these features
from the sensor.
6. Verify that the material is not too transparent or reflective. Since the sensor works by
using reflected light to determine the board edge, any material that is very light in color or
LHR Technologies, Inc. CarveWright™ Troubleshooting Guide (Rev 1.07) 05/10/11 13
very dark in color cause it to get a reading that is out of its normal limits. 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.
7. If the board sensor error cannot be resolved by doing the above checks you will need to
check the sensor readings directly to see if it is working properly. To check the status of
the board edge sensor, go to the CarveWright Main Menu->Configuration->Sensor Check
menu. Use the arrow keys to find the item titled “Board Sensor” on the bottom line of the
display. Do the following checks:
a. Load a pine or similar colored board, lower the head, and check the reading
displayed on the LCD when the sensor is over the board. Anything reading over 90
is acceptable. Anything under 90 requires a new sensor.
b. Check the reading displayed on the LCD when the sensor is not over a board by
moving the cutting head all the way to the left. The correct reading should be less
than 10 and ideally 0.
c. Raise the head, so that a small board can be easily place underneath the Board
Sensor. Move it up and down so as to cause the Board Sensor reading to go greater
than 50. Quickly remove it from under the sensor. The reading should drop
immediately to less than 10 and ideally 0. If it does not drop immediately the
sensor is faulty and needs to be replaced.
8. If none of the above steps solves the issue consult CarveWright and the detailed trouble
shooting document titled “Please Clear Board Sensor”.
The above is from this PDF:
http://www.carvewright.com/2010CWweb...ting_Guide.pdf
AskBud