SIPLACE Vision Customer_en.pdf - 第71页

Component Shapes Leaded Component Shapes Specific Component Shapes S tudent Guide SIPLACE Vision (Customer) Edition 12/2008 EN Component Shapes 71 Several description options have been selected for ICOS: LCU/LRL/ SIPLACE…

Component Shapes

Specific Component Shapes Leaded Component Shapes

Student Guide SIPLACE Vision (Customer)

Component Shapes Edition 12/2008 EN

Lead description

Special features

 Inspection of the lead number, position and pitch is set as a default for these leads and can not be

disabled.

 If the CO body does not reach up to the beginning of the leads (due to ICOS), this is only a superficial

programming error, which makes assessment of the DPACK COs slightly more difficult.

There need not always be a centering offset as a result of this.

 COPLANARITY measurement is possible provided the option is installed and there are at least three

leads (not in a row) on the body.

 Both groups for this component shape must have so-called

Gullwing leads i.e. (normally) leads which are narrower

than the body and have level contact surfaces.

 These leads are as wide as the solder resist contact

surface, on the board connection surface. The lead length

is significantly longer than the contact length.

 In the single lead group, the lead width must have at least

double the width of the second widest lead.

 The leads are outside the body surface. Notches may not

be programmed.

DPACK component shapes have a center lead with no board

contact.

These hanging leads are not important for the placement of

components on the electrical connection surfaces and should

therefore be omitted from the description.

The gullwing leads then need to be divided into two groups

(except for the two contact leads).

If the heat sink (tab) gullwing lead has a slanted edge along its entire length, you will need to extend

the lead length until a vertical lead edge allows you to perform optical recognition.

Gullwing Wraparound

Component Shapes

Leaded Component Shapes Specific Component Shapes

Student Guide SIPLACE Vision (Customer)

Edition 12/2008 EN Component Shapes

Several description options have been selected for ICOS:

LCU/LRL/ SIPLACE Pro 1.4: the CO center for placement forms the CO center for the overall

dimensions.

SIPLACE Pro 2.0: the CO center for placement forms the body center!

Explanations about Component Center and Body Center

The placement positions for DPACKs, as created by the CAD data, often refer to the center of the CO,

including leads.

Using the body center set in SIPLACE Pro (and the previous programming systems) as the reference

point has the advantage that you are not dependent on differing lead lengths and can always place the

nozzle on the level body center.

This necessitates adjustment of the placement position as follows:

Center displacement = lead length long – lead length short : 2

(If you should make the setting as follows

Lead length short = 1 mm / lead length long = 2 mm and body width = 6 mm

, you will recognize the CO center up to 4.5 mm from above / the body center will be at 4 mm from above.)

The CO center or body center, as determined during centering, needs to be matched with the board X/

Y placement position by the placement machine.

Component Shapes

Specific Component Shapes Leaded Component Shapes

Student Guide SIPLACE Vision (Customer)

Component Shapes Edition 12/2008 EN

As you can see on the white dotted line, the body center is higher.

Fig. Component center including leads

5-1: Body center without leads