TR7500_Series_Software_v29_En.pdf - 第252页

Test Research Inc. 230 TR7500 Series User Guid e –Softwa re v.2.9.0 Figure 384 : Pin Pass Level Settings  [B/ W Threshold] – T he threshold to judge the black and w hite.  [Hi g h Ratio] – Set the tolerance ratio tha t…

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TR7500 Series User Guide –Software v.2.9.0 229

9.2.4 Lead Void

Checks for no solder or open for IC leads. The algorithm is the same as for Void window.

The difference is not calculating the bright area as denominator when training the lead void.

The [Pass Level Settings] are shown in the following figure.

Figure 382: Lead Void Pass Level Settings

 [B/W Threshold] – Set the threshold to judge the black and white.

 [Bright Ratio] – Set the tolerance of white ratio.

9.2.5 Pin

Checks the shift, over/ low solder, or open of components. Set [Threshold} and {High/Low

Ratio] to check NG or not. When user trains a pin window, the software will memorize the

bright zone as 100.

Figure 383: 100% & Low Solder, Over Solder Settings

The [Pass Level Settings] are shown in the following figure.

Test Research Inc.

230 TR7500 Series User Guide –Software v.2.9.0

Figure 384: Pin Pass Level Settings

 [B/W Threshold] – The threshold to judge the black and white.

 [High Ratio] – Set the tolerance ratio that the box cannot exceed.

 [Low Ratio] – Set the tolerance ratio that the box cannot be lower than.

9.2.6 Solder

Checks for bridging of IC leads. The [Solder] window is set with angle camera as default.

When the user trains the [Solder] window, the threshold will be automatically set according to

the surrounding area. Solder will be checked outward from the window. If the threshold is

exceeded by 7/10 pixels, it will show failure in standard/high resolution.The [Pass Level

Settings] are shown in the following figure.

Figure 385: Solder Pass Level Settings

 [Bridge Threshold] – The threshold to judge the black and white.

 [Bridge Range Ratio] – Set the percentage of pixels to inspect

 [Bridge Type] – Set the direction to inspect.

9.2.7 Polarity Pair

Move a pair of windows to different positions with a wide variation of gray level. System will

show polarity fail if the gray level of two windows is reversed.

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TR7500 Series User Guide –Software v.2.9.0 231

Figure 386: Set Two Polarity Pair Windows

9.2.8 Align

The [Align] window uses the projection in X-Y direction (Method3) to relocate an IC or Rnet

(Cnet) when the PCB is warped. Align only relocates one component.

Figure 387: Align Window

The [Pass Level Settings] are shown in the following figure.