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4022 591 960 82 Us er Reference Man ual 02.02 FC M Multif lex 6-49 Pr oduc t Ch ang e Ov er 6.6.4 Component Size Specification The laser al ign sy stem uses the comp onen t ’ s size 1 f or componen t d etection purposes …

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We define four leaded component types:

• LEADED 1 = polarized, with leads on one or opposite body sides

• LEADED 2 = non-polarized, with leads on one or opposite body sides

• LEADED 3 = polarized, with leads on adjoining body side(s)

• LEADED 4 = non-polarized, with leads on adjoining body side(s)

■ ROUND

A component type is defined as “ROUND” if the component is round in the

radial direction.

NOTE: Round axial components, like MELFs, are defined as “ LEADLESS” components.

Only X and Y offsets are measured for round components.

We define two round component types:

• ROUND 1 = polarized

• ROUND 2 = non-polarized

6.6.2 Polarity Sensitivity

Polarized components will always be placed under the angles as specified in the

action spec (item mnt_phi in the MOUNT records).

Non-polarized components might be placed with 180 degrees offset to reduce the

alignment time.

6.6.3 Algorithms’ Overview

Following table shows the relation between the various component types and the

algorithm to be used.

TABLE 6-20

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LEADLESS 1 0

LEADLESS 2 128

LEADED 1 / RNET 1

a. Depending on the presence or non

presence of the RNET donglle.

LEADED 2 129

LEADED 3 2

LEADED 4 130

ROUND 1 3

ROUND 2 131

4022 591 96082 User Reference Manual

02.02 FCM Multiflex 6-49

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6.6.4 Component Size Specification

The laser align system uses the component’s size

for component detection

purposes (e.g. detection result “on edge”, or “wrong component type”).

If the measured component sizes are not within the specified tolerances, the

component will be rejected, and the system tries to pick a new component.

The size should be specified in such a way that the length is larger than, or equal to

the width (sizes in mm).

NOTE: If the specified maximum length or width exceeds 6.5 mm, a different - less

accurate - measurement sequence will be executed, because in this case the

component’s side does not completely fit within the laser beam’s scanning area.

6.6.5 Reject Levels

The SMD info file also contains the maximum allowed measurement offset in X, Y,

and Phi direction. These so-called “reject levels” are also used by the laser align

system. If the system measures a larger offset, the component will be rejected, and

a new component will be picked.

This is necessary since the retaining force of the nozzle vacuum might be too low

when components are picked up with too much offset (nozzle partially open!).

NOTE: Reject levels that are defined too high will lead to very inaccurate placements!

6.6.6 Component Offsets

When using assymmetrical components, component offsets in X, Y, and Phi

direction can be specified.

If the component’s body centre does not match its overall centre (body including

leads), it is possible to specify the offset between both centres (see FIGURE 6-17).

FIGURE 6-17 Assymmetrical component

1. Length and width, including tolerances.

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6.7 WVM

6.7.1 Introduction

In order to be able to align a component by vision alignment, i.e. alignment by

using the camera unit, it is necessary to have all relevant information concerning

this component available.

For each package type, this information is available in an SMD information file, the

so-called “SMD info file”. This file consists of a number of ASCII lines that define

the various parameters.

The FCM Multiflex package type database you received with your FCM Multiflex

software package contains SMD info files for the most commonly used component

package types, ranging from type 0402 up to SO16. For more information on this

SMD info file type, see the chapter SMD Info Files in the Service Manual FCM

Multiflex.

6.7.2 General Information on Component Package Parameters

6.7.2.1 Introduction

In this section, all relevant aspects that play a role within the SMD info file

parameters description are explained. Exact definitions are given here to avoid

confusion while manipulating components and interpreting results.

6.7.2.2 Package Orientation Aspects Definitions

Component Coordinate System

The relationship between the component coordinate system (wind directions) and

the machine coordinate system (X,Y coordinates) is shown in the figure below

(FIGURE 6-18)

FIGURE 6-18 Component orientation (wind directions) related to machine orientation (X,Y coordi-

nates)

North

EastWest

South

X-dimension

Y-dimension

view from

above