FCM_User Reference Manual.pdf.pdf - 第245页

4022 591 960 82 Us er Reference Man ual 02.02 FC M Multif lex 6-53 Pr oduc t Ch ang e Ov er Component Leng th and Width Once y ou hav e dete rmined th e compone nt ’ s si de s defini tion (see secti on bef ore ), you hav…

100%1 / 306
Product Change Over
User Reference Manual 4022 591 96082
6-52 FCM Multiflex 02.02
FIGURE 6-19 Component side determination flow diagram
component has 1 lead on
only two opposite sides ?
component has
orientation marker
on corner ?
component has
(electrical) reference
lead 1 on corner ?
component has
polarity marker ?
Yes
Yes
Yes
Yes
Leads EAST-WEST
polarity marker is
WEST
No
No
No
marker is
SOUTH-WEST
lead 1 is
SOUTH-WEST
longest side EAST-WEST,
NORTH-SOUTH
unim
p
ortant
leads are SOUTH
only leads
at one side ?
Yes
component has
orientation marker
on side ?
component has
(electrical) reference lead
1 on side ?
Yes
Yes
No
No
marker is
SOUTH
lead 1 is
SOUTH
distinction EAST/WEST
not important
No
No
4022 591 96082 User Reference Manual
02.02 FCM Multiflex 6-53
Product Change Over
Component Length and Width
Once you have determined the component’s sides definition (see section before),
you have to know what component sides are defined as length respectively width.
See following table for determination.
TABLE 6-22
REMARK: Please note that according to this definition NOT the longest component
side automatically is defined as “ length” !
Component Body and Outline
Depending on the component type, measurements are done component package
body-based or component package outline-based. See FIGURE 6-20.
FIGURE 6-20 Component package’s body versus outline
&RPSRQHQWVLGH &RPSRQHQWRULHQWDWLRQ 0DFKLQHRULHQWDWLRQ
LENGTH WEST-EAST X-axis
WIDTH SOUTH-NORTH Y-axis
packag
e
outlin
e
package
bod
y
Product Change Over
User Reference Manual 4022 591 96082
6-54 FCM Multiflex 02.02
Lead Group
A lead group is defined as a number of in-line arranged leads with identical
dimensions and identical pitch; see FIGURE 6-21.
FIGURE 6-21 Lead group definition
Leading Lead (first lead)
To determine what lead from a lead group is defined as the first one, the leading
lead, following approach is valid:
■ First find out what is the component’s Nort side, East side etc. (see before);
■ Looking from West to East, the first lead you “meet” in the lead group(s) is the
leading lead. This goes for the North and the South side;
= leadgroup