YSD_Users_E.pdf - 第248页
5-59 5 Creating the board data 5 Adjust the light le vels for the mark. Press the [Mark Light] button to open the light level adjustment scree n. Adjust the light level in each lighting zone so that the entire mark is cl…
5-58
5
Creating the board data
6.5 Mark Adjust mode
This operation checks whether the parameter settings are correct. For parameters which are unspecified, the
optimal values can be obtained by performing “VISION TEST” here. The following adjustment procedure is
explained for cases where “Mark Type” of the Basic parameters is set to “Fiducial”.
1
Select the mark data.
Open the mark information screen and line up the cursor with the mark data you want to check.
2
Press the [Mark Adj] button to enter the Mark Adjust mode.
The Mark Adjust window appears as shown below.
Mark Adjust window
Step 4 Step 5
64535-N7-00
3
Set the board on the conveyor and clamp it.
n
NOTE
Before clamping the board on the conveyor, you must adjust each conveyor unit. For the conveyor unit adjustment,
see "3.3 Changing the conveyor unit setup" in Chapter 2.
4
Perform teaching for the mark.
1. Press the [Move Head] button to open the Move Head window.
2. Use the arrow buttons to position the moving camera above the mark so the mark is aligned with the
cross cursor on the vision monitor as shown in the table below.
3. Press the [Close] button to return to the Mark Adjust window.
Shape Type Teaching point Example
Circle, Square
Triangle, Sp. Shape
Corner
Center of mark
Corner of mark
Mark teaching positions
63543-N7-00
5-59
5
Creating the board data
5
Adjust the light levels for the mark.
Press the [Mark Light] button to open the light level adjustment screen. Adjust the light level in each
lighting zone so that the entire mark is clearly and uniformly seen with a high contrast to the
background.
Mark lighting adjustment
64586-N7-00
As a general guide for adjusting mark lighting, try these suggestions.
• Copper foil, gold plating
Light up the "Outer Level", "Inner Level" and "Coaxial Level" (at "+1" light level).
If the mark is dark, then try increasing the "Inner Level".
• Solder leveler
Light up the "Outer Level", "Inner Level" and "Coaxial Level" (at "+1" light level).
If the mark surface is uneven and the mark contours appear faint and hard to see on the screen,
then try increasing the Outer Level.
• Metal mark on ceramic board
Light up the "Inner Level" and "Coaxial Level" (at "+1" light level).
If the ceramic portion is too bright, try lighting up the "IR Outer Level" and/or IR Inner Level" only.
5-60
5
Creating the board data
6
Press the [Test] button to perform the vision test.
Repeat this test several times. If no error is detected, each parameter is appropriate so advance to the
next step. If an error occurs, make adjustments with the procedure below.
1. Press the [Cancel] button to exit the Mark Adjust mode and check whether the parameter settings
(Mark Type, Shape Type, Algorithm Type, etc.) are correct.
2. After checking the parameters, enter the Mark Adjust mode and press the [Test] button again to run
the same test. When no errors occur, move to the next step.
3. If an error still occurs, press the [Find Best] button to find an optimum threshold level.
4. After the optimum threshold level has been found, run the vision test again. If no errors occur, go to
the next step.
5. If the optimum threshold level could not be obtained, press the [Check] button. A binary image
appears on the vision monitor according to the current parameter settings as shown below.
Mark binary image
64536-N7-00
6. Adjust the threshold level as suggested below, so that the mark image is clearly displayed.
Binary image check
State Image Countermeasure Remarks
All white
All black
Noise within mark
Noise outside of mark
Other than mark in
search area
Increase the threshold level with
the arrow buttons.
Decrease the threshold with the
arrow buttons.
Increase the Cut Inner Noise level.
Increase the Cut Outer Noise level.
Reduce the Search Area size.
Adjust it till the mark is displayed.
Adjust it till the mark is displayed.
Recognition time becomes longer
as the Cut Inner Noise level is increased.
Recognition time becomes longer
as the Cut Outer Noise level is increased.
Refer to "Search Area"
explained previously.
63544-N7-00
7. Press the [Find Best] button again to find an optimum threshold level.
If the result is successful, next run the vision test. When no error occurs, advance to the next step.
8. If the vision test result is a fail, enter a larger value for the Tolerance parameter on the Mark Adjust
windows, then press the [Find Best] button again.