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III- 14 Programming Manual Part III Inspection Algorithm 1.6 Length 1.6.1 Inspection Ov er view Length is the algorithm to inspect component’s length. Surround the component and around it by a window . Component’ s lengt…

III-13

Programming Manual

Part III Inspection Algorithm

1.5.3 Setting Procedure

Step1: Select SideLignt from the Lighting drop-down list.

Step2: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step3: Check if the sample value is in OK range. If it is out of OK range, change values in SideLight

Upper Level or TopLight Upper Level.

NOTE

If the inspection area is too small, change values in PAD Length to larger.

Step4: Press Inspect. Make sure that the inspection is completed properly.

(a) Normal (b) Missing (c) No Solder

Low Brightness High Brightness High Brightness

Figure 1-13 Missing / Solder inspection by ChipMissing3

1.5.4 Calculation of Sample Value

Set the OK brightness range of SideLight and TopLight by adjusting SideLight Upper Level /

TopLight Upper Level values. The percentages of the area that the result is OK in solder inspection

window at either end of the chip component with TopLight and SideLight are calculated.

The lower value is shown as the sample value.

㪇㪏㪇㪉㪌㪌㪈㪌㪇㪇㪉㪌㪌

㪧㪘㪛㩷㪪㫀㪻㪼㩷㪤㪸㫏㪧㪘㪛㩷㪫㫆㫇㩷㪤㪸㫏

㪐㪇㩼㪏㪇㩼

Calculate the Rate of the Overlapping Parts

TopLightSideLight

TopLight

0䌾80

SideLight

0䌾150

Sample Value

OK Range

Range

Figure 1-14 Calculation of Sample Value

III-14

Programming Manual

Part III Inspection Algorithm

1.6 Length

1.6.1 Inspection Overview

Length is the algorithm to inspect component’s length.

Surround the component and around it by a window. Component’s length is calculated based on the

changes of brightness level in the window.

If the inspected component’s length is in OK range, the result will be OK.

Length is suitable for missing inspection of chip components.

1.6.2 Parameter Setting

Figure 1-15 Length

Parameter Description

Lighting Select a lighting that the component is visually clear.

Algorithm Select Length.

Upper Level[0-255],

Lower Level[0-255]

Enter 0 in Upper Level and Lower Level if the component brightness level is

lower than the brightness level of a PCB.

Enter 255 in Upper Level and Lower Level if the component brightness level is

higher than the brightness level of a PCB.

Option Enter 0.

Shift[V1-V8]

Enter the appropriate vector. Any value from V1 to V8 is available.

Select the vector according to the Memorize to ﬁ eld of the Adjust window.

Memorize to -

Memorize to Set the upper and lower limit of the OK range.

Sample

Shows the length of the component by 10 μm.

Table 1-6 Parameter of Length

III-15

Programming Manual

Part III Inspection Algorithm

1.6.3 Setting Procedure

Step1: Select a lighting that the target component is visually clear from the Lighting drop-down list.

Step2: Adjust the inspection window to be longer than the length of the component in the longitudinal

direction. In lateral direction, adjust the inspection window to be shorter than the component.

Length

Figure 1-16 Inspection Window of Length

Step3: Verify the value of Upper Level and Lower Level. Enter 0 in Upper Level and Lower Level

ﬁ eld if the component brightness level is lower than the PCB. Enter 255 in Upper Level and

Lower Level ﬁ eld if the component brightness level is higher than the PCB.

Step4: Set the OK range by setting Upper and Lower. Sample shows the component length by

10 μm.

Step5: Enter the appropriate vector into the Shift ﬁ eld by selecting from V1 to V8 according to the

vector used in the Memorize to ﬁ eld in the Adjust window.

Step6: Press Inspect. Make sure that the inspection is completed properly.