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6 Product / Package Form User Manu al Line Computer UNIX 6.1 Package Form Editor Software Version 501.xx 01/99 Issue 6 - 34 Fig. 6.1. 13 X- axis of the component is al igned with the long edge of the nozzle If the aforem…

User Manual Line Computer UNIX 6 Product / Package Form

Software Version 501.xx 01/99 Issue 6.1 Package Form Editor

6 - 33

6.1.3 Package Form Definition

6.1.3.1 Definition of the Component’s Coordinate System

NOTE

For the description of a component’s package form, the dimensions should, as a rule, be taken from the corre-

sponding data sheet. Please note, that the description always refers to a component as seen from above.

The component is displayed in its 0°-description in the view area of the Package Form Editor. Here, the origin

of the coordinate system is always located in the center of the view area. From there, the X-axis points to the

right, the Y-axis points upward. It is also possible to describe a component both in horizontal and in upright

position (see Fig. 6.1.12). As a rule, the center of the component coincides with the zero point of the coordinate

system.

Fig. 6.1.12 0°-Description in the Package Form Editor

Legend pertaining to Fig. 6.1.12:

➀

Correct (display in the view area)

➁

Incorrect (display in the view area)

The 0°-description of the standard package form contained in the package form library (GF-Bibliothek) is sub-

ject to certain rules which should also be observed for the creation of customer-specific package forms. It can

thus be ensured that different programmers can work with uniformly defined package forms. In this way it is

possible to determine, for example, the pick-up angle at the station without having to check the 0°-description

in the Package Form Editor.

An incorrect 0°-description may result in pick-up or vision errors at the station.

To avoid such errors, the following rule should be observed:

Rule: The long side of nozzles featuring rectangular suction areas is to be positioned along the

X-axis.

This means that die X-axis of the component points in the direction where the nozzle will make contact with the

long side of its suction area (see Fig. 6.1.13).

Exception: special nozzles with 90°-displacement

1 2

6 Product / Package Form User Manual Line Computer UNIX

6.1 Package Form Editor Software Version 501.xx 01/99 Issue

6 - 34

Fig. 6.1.13 X-axis of the component is aligned with the long edge of the nozzle

If the aforementioned rule is not observed, it may happen that the incorrect 0°-description will result in the errors

depicted below (see Fig. 6.1.14).

Fig. 6.1.14 0°-Description Errors

0° 90° 0°

1 2 3

Correct

position of nozzle for picking up the component

transport

direction

transport

direction

transport

direction

Vacuum error

Vision system erro

Pick-up angle in the feeder (set-up)

0°-Description wrong0°-Description correct

User Manual Line Computer UNIX 6 Product / Package Form

Software Version 501.xx 01/99 Issue 6.1 Package Form Editor

6 - 35

Legend pertaining to

Fig. 6.1.14

➀

The description is correct - no vision system errors.

➁

Vacuum problems occur - no vision system errors.

Although the nozzle’s pick-up angle is correct, its contact position on the component is incorrect.

➂

Vision system error - no vacuum problems.

Although the nozzle makes correct contact with the component - due to the incorrect pick-up angle of 0° -

the vision system, however, expects the component in its 0°-position (which, in accordance with the 0°-

description - is vertical).

This results in the measuring windows being rotated by 90° - no evaluation is thus possible.

Rule: Pin 1 is to be located in the lower left corner or in the center of the component’s left side.

In the case of diodes, the anode (+) must point in positive X-direction.

Fig. 6.1.15 Position of Pin 1 and Orientation of Diodes (Examples)

Rule: The side with the higher number of pins is to be located at the bottom (negative

Y-direction).

Fig. 6.1.16 Orientation of the Side Featuring a Higher Pin Count in Negative Y-Direction (Examples)

Rule: If the component has a special feature, e.g. a wider pin, such special

feature is to be located at the bottom (negative Y-direction).

Fig. 6.1.17 Orientation of the Side Featuring Wider Pins in Negative Y-Direction (Examples)