VI User Manual.pdf - 第43页
Maintenance mode Vision 2007 4.10 User Manua l Rev 01 2 - 7 1. Click on Auto check to bring up the data input window. 2. After the CONVEYOR IN ITIALIZATION message, you can ins tall the calibratio n tool in the ma- chine…
Maintenance mode
2 - 6 Vision 2007 4.10 User Manual Rev 01
2.1.3 Calibration
Once you have adjusted camera focus
and lens opening, you can calibrate the
machine using the glass calibration tool .
The Axes references (A) are the dis-
tances between the axis 0 (middle of the
axis) and the machine 0 (panel stop).
The Tool Angle (B) must be 0° to per-
form the calibration. Measure lets you
calculate the angle of the calibration tool
with respect to the axes.
The Camera calibration (C) measures the pixel size.
In Automatic measure of CCD angle (D) section, press Start to measure the angle of the CCD
with respect to the axes.
Perpendicularity (E) of axes and deviation.
Click OK to confirm the values entered by default or the changes made.
2.1.4 Auto check
The Auto check is a function used to verify proper operation of the optical and mechanical parts
of the machine by means of a glass plate calibration tool:
Pixel size,
Axes angle,
Axes pitch,
Machine accuracy,
Machine repeatability.
If you change the position of the
stop, these values must be
changed in the parameters
menu.
The tool angle must be zero to
perform the following measure-
ment.
The calibration tool must be
parallel to the axis (tool angle:
+/- 0.005°).
If the pixel size is too large, lower the camera.
If the pixel size is too small, raise the camera.
Any vertical movement of the camera will require adjustment of focus.
A
B
C
D
E
Test machine
Maintenance mode
Vision 2007 4.10 User Manual Rev 01 2 - 7
1.
Click on
Auto check
to bring up the
data input window.
2.
After the
CONVEYOR INITIALIZATION
message, you can install the calibration tool in the ma-
chine.
3.
Once the calibration tool has been installed in the ma-
chine, the opposite screen is brought up.
4. Press Start to measure the tool angle and run the auto
check.
Each test checks a specific part of the machine. During the auto check, a green tick appears if
the relevant test is correct. Otherwise, a red cross is displayed if the test results are incorrect.
The Report button open the report of the check that has just been carried out (see next page).
To validate OK, the text fields
must be filled in (at least 2
characters). All glass tools
have a specific serial num-
ber.
The Auto check can only be run when the an-
gle between the calibration tool and the axis
is zero (0 +/- 0.07 degrees).
Otherwise, the value of the auto specification
angle appears and the clamps release the
board. You must then adjust it manually and
restart measurement until the angle is OK
and the test can begin.
The tool must be adjusted manually. Turn the
calibration tool in a clockwise direction if the
tool angle is negative and vice versa.
Test machine
Maintenance mode
2 - 8 Vision 2007 4.10 User Manual Rev 01
Axis angle (A): check the angle and the linearity of the XY axes.
Axis step (B): check the pitch of the XY axes.
Balance of axis
(
C
): check that the camera movement direction does not affect the measurement.
Accuracy (D): check measurement accuracy: points on the calibration tool are measured and
are used to obtain the average and the standard deviation between the measured position and
the theoretical position.
Repeatability (E): check average, standard deviation and capability (0.2/6 standard deviation)
of the machine.
Calibration (F):
Pixel size.
Ratio between pixel size in X and Y.
Angle between the camera and its holder.
Skew: parallelism between the camera plane and the calibration tool.
Residual max.: maximum distortion on the calibration matrix.
Residual average: average distortion on the calibration matrix.
A
B
C
D
E
F
G
H
Test machine