OM-1650-001_w - 第24页

OM-1650 21 9. Bad Mark Camera T est Bad Mark Not Exist F16 As a result of the camera test and measurement for bad mark detection, the gray value of the bad mark is indicated in the "Grad. V al." cells and &quot…

OM-1650

9. Bad Mark Camera Test

PEC Recog

[Continuation] Button

: When selected, the recognition test is

performed continuously.

[Step] Button

: When selected, the recognition test is

performed step by step.

[Set to Cmt PP Dt] Button

: When selected, the test data after data editing

is registered as the pattern program data.

Judgement Threshold Calculation Procedure

Procedure

(1) Put a bad mark on the PCB to be produced.

Note

(a) Use a black mark as a bad mark for a comparatively bright PCB detection

area (PCB with a lot of light reﬂex).

Use a white mark as a bad mark for a comparatively dark PCB detection

area (PCB with a little light reﬂex).

(b) When the selection is changed (from "Black Mark" to "White Mark" or

vice versa), be sure to change the mark image ("Black (E/NR)" or "White

(E/R)" in the related "Mark Image" text box of the pattern program data.

(2) Move the PCB to be produced to the PCB positioning section.

(Transfer the PCB to the block where the bad mark is detected using the PEC

recognition camera, using the [PCB XFER] button or [MNL XFER] button).

(3) At ﬁrst, select the unit PCB with a bad mark and perform the "Step Move".

Then, select the unit PCB without a bad mark and perform the "Step Move".

Bad Mark Exist F15

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OM-1650

9. Bad Mark Camera Test

Bad Mark Not Exist F16

As a result of the camera test and measurement for bad mark detection, the

gray value of the bad mark is indicated in the "Grad.

Val." cells and "Exist" or "Not Exist" in the "Judge" cells.

The mean value of the gray values for "Exist" and "Not Exist" (Bad Mark

Detection) is regarded as a threshold value for the bad mark detection.

Example :

Result of Measurement

85 in "Grad. Val." Cell for "Exist" in "Judge" Cell

199 in "Grad. Val." Cell for "Not Exist" in "Judge" Cell

85 + 199 = 284 ÷ 2 = 142 = Threshold Value

(4) When the data is to be taught, press the [Data Teach] button and when the

data is to be edited, press the [Data Edit] button.

Reference

When the data teaching is to be performed, refer to "10. Camera Bad Mark

Teaching".

Specify Bad Mark : Master F17

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9. Bad Mark Camera Test

Specify Bad Mark : Normal F18

Note

The setting of "Boundary Val." (Boundary Value Warning), is performed in

the "Normal Mark Data Edit" window.

(5) When the data has been edited, press the [Yes] button.

(The edited data will be registered as the test data).

(6) Press the [Set to Cmt PP Dt] button.

(The "Conﬁrmation" window will appear).

(7) Press the [Yes] button in the "Conﬁrmation" window.

(The test data will be registered as the current pattern program).

Note

When the [RECOG] button on the main menu bar is pressed, the image

of the bad mark and the boundaries (camera test and measurement of bad

mark) are displayed graphically.

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