Calibration - Canon PD-704 User Manual

2-3. Calibration

An absolute length measurement value error may occur depending on the installation state of the main unit or the
characteristics of the target measurement object.
Calibration allows you to obtain a length measurement value close to your estimate.
What are required for calibration
- A sample equivalent to the actual length measurement object
- A measure to move by already known length
Calibration method
- Move the above sample by already known length, and measure the length using the Non-Contact Displacement
Sensor.
It is recommended that you measure the length several times in the same conditions.
Correct the difference between the already known value and the average of several length measurement values.
(See 2-2-3. Setting the user correction coefficient)
Calibration example:
Punch a mark on the target measurement object to perform calibration.
1) Punch a guide mark on the target measurement object using the length measuring instrument.
2) Start measurement using the Non-Contact Displacement Sensor, and displace the target measurement object.
3) End measurement using the Non-Contact Displacement Sensor, and punch a mark on the target measurement
object again.
Calibrate the length measurement value obtained using the Non-Contact Displacement Sensor based on the gap
of marks.
Use a length measurement microscope, etc. to measure the gap of marks accurately.
Set the main unit to a value calculated in the following equation:
(Gap of marks) / (Length measurement value obtained using the Non-Contact Displacement Sensor) = User
correction coefficient
For how to set the user correction coefficient, see section "2-2-3. Setting the user correction coefficient."
Main unit
Step 1
Step 2
Step 3
Non-Contact Displacement Sensor User's Manual Rev 1.00
Marking punch
Mark
Target measurement object
Move the target measurement object
Gap of marks =
Displacement
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