Unitek UNIBOND 2, User Manual

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6.11.07. I f you e l e c t t o use t h e Vo l t a g e + Current Mode, make t h e weld r e s i s t a n c e
measurements o u t l i n e d i n 5 . 1 2 and 5 . 1 3 . S e t t h e Output Resistance Range S e l e c t o r and
Control and switch t o t h e Vo l t a g e + Current Mode.
6 . 11 . 0 8 . A s t h e Output Resistance i s increased, t h e Amplitude must b e increased t o
obtain a s a t i s f a c t o r y weld. T h i s w i l l
a l s o increase t h e compensation d u r i n g t h e b e -
ginning o f t h e c y c l e . C o n v e r s e l y, a lower Output Resistance w i l l make i t necessary t o
reduce t h e Amplitude.
TRACE TIN PLATE%
1 e x COPPER
GOLD PLATED
1 on COPPER
Unplated
1 o z COPPER
Unplated
1 o z Copper
TYPE BOARD Epoxy Glass Epoxy Glass Epoxy Glass
Epoxy Glass
TRACE WIDTH ( i n ) . 0 1 5 .015 .015
.015
MATL. USED
FOR REPAIR
.003 z . 0 1 5 inch
Gold Plated Kovar
.003 z . 0 1 5 inch
Gold Plated %over
.003 z . 0 1 5 inch
Copper Ribbon
32 gauge
Bar* Wire
FORCE (oz)
35
35 35
35
UNIBOND ELEC-
TRODE MATERIAL
RWMA 2
M I & 2 MOLY
IDLY
GAP ( i n c h ) .012
.010 - . 0 1 2 .012 .018
MODE
VOLTAGE VOLTAGE
V
♦
I V
♦
I
6 . 11 . 0 9 . I f you have established welding schedules using U n i t e k ' s o r i g i n a l Unibond i n
the Manual Mode. i t w i l l n o t b e necessary t o modify those schedules t o use t h e Unibond
I I i n t h e Vo l t a g e Mode.
Figure 2 3 a - Kovar Ribbon positioned
over a broken t r a c e and welded.
Figure 23b - R i b b o n c u t t o l e n g t h
and welded on t h e o t h e r e n d .
TABLE I I I - TYPICAL SETTINGS FOR WELDING WITH THE UNIBOND I I POWER SUPPLY
AMPLITUDE ( v o l t . ) . 6 0 . 7 0 . 9 0 1 . 1
DURATION (sus) 1 0 10
4
RESISTANCE 3 3
( e I l l i o b a s )
- 2 2 -