00191297-02 - 第284页

6 Vision functions User Manual S-23 HM 6.6 Test Component Software Version SR.405.xx 05/ 99 Issue 282 6.6.4.19 ‘ Lead’ m easuring mode Click on the ‘Setti ng’ fiel d in the ‘ Lead’ m easuring m ode to c all up th e Lea d…

User Manual S-23 HM 6 Vision functions

Software Version SR.405.xx 05/99 Issue 6.6 Test Component

281

Measurement 6

If the inner lead tips are mapped better than the outer tips, for example, if a shiny lead is bent up-

wards slightly, you can select one of the following options: 6

– measuring the tips via the inner tips of the leads, for bases, for example

– center of the lead, center measurement, for PLCC, SOI, for example

– measuring the tips via the outer tips of the leads, for QFP, SOT, SO, for example

Number of leads to be measured at each corner 6

If the lead does no longer stand out well from the background, in the case of white plugs, for ex-

ample, use this option to specify the number of leads to be measured. However, to do this, the

component must be fully described in the line computer (FDC). 6

NOTE 6

This value should only be modified for special components and plugs. Deactivate lead measure-

ment for white plugs. 6

Angle measurement 6

For single-row components, the angle of rotation is not calculated correctly. Consequently it is bet-

ter to access calculation of the angle of rotation in Row measuring mode. Switch off the angle

measurement in this option. 6

6 Vision functions User Manual S-23 HM

6.6 Test Component Software Version SR.405.xx 05/99 Issue

282

6.6.4.19 ‘Lead’ measuring mode

Click on the ‘Setting’ field in the ‘Lead’ measuring mode to call up the Lead measuring mode

menu. 6

Fig. 6.6 - 40 Measuring mode option, Lead measuring mode menu

This menu is used to 6

– specify the lead measuring method.

– to select the windows separately for each lead or a combined window for every lead to be mea-

sured.

Measurement 6

If the inner lead tips are mapped better than the outer tips, for example if a shiny lead is bent up-

wards slightly, you can select one of the following options: 6

– measuring the tips via the inner tips of the leads, for bases, for example

– center of the lead, center measurement, for PLCC, SOJ, for example

– measuring the tips via the outer tips of the leads, for QFP, SOT, SO, for example

User Manual S-23 HM 6 Vision functions

Software Version SR.405.xx 05/99 Issue 6.6 Test Component

283

Windows 6

–

Separately for each lead

Here you define the window in the primary direction (dark blue) and secondary direction (light

blue) for measuring each standard lead for irregular components and special components.

–

Combined window

Used to define a common window for all the leads. This applies to four-sided, symmetrical

components only.

6.6.4.20 ‘Grid’ measuring mode

Click on the ‘Setting’ field in the ‘Grid’ measuring mode to call up the Grid measuring mode

menu. 6

Fig. 6.6 - 41 Measuring mode option, Grid measuring mode menu

In this menu, enter the number of balls to be measured at each corner: 6

– ’3’ for single measurement

– 5 for multiple measurement