Unitek UNIBOND 2, Руководство пользователя

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In a Constant Power System, F i g u r e 7 . t h e power w i l l remain constant r e g a r d -
less o f what changes occur i n t h e welding r e s i s t a n c e . T h i s makes t h e process e a s i e r
to c o n t r o l whenever:
1. T h e c o n t a c t r e s i s t a n c e i s l a r g e w i t h r e s p e c t t o t h e r e s i s t a n c e
of t h e workpieces.
2. T h e workpieces h a v e v e r y narrow " p l a s t i c zones" such a s copper.
The Unibond I I maintains Constant Power a s i l l u s t r a t e d i n Figure 7 . T h e
c i r c u i t r y o f t h e Unibond I I i s so unique t h a t U n i t e k has a p p l i e d f o r a p a t e n t . I n
the VOLTAGE + CURRENT Mode. t h e Unibond I I w i l l dynamically increase o r reduce t h e
amplitude o f t h e welding pulse i n an e f f o r t t o m a i n t a i n a constant v o l t a g e - c u r r e n t
product, c o n s t a n t power. a t t h e e l e c t r o d e s .
2.12. W E L D RESISTANCE COMPENSATION - Continuously a d j u s t a b l e from 1 t o 1 5
milliohms.
2.13. W E L D FIRE LOCKOUT FEATURE - Prevents t h e Unibond from f i r i n g i f : ( 1 ) t h e
magnetic c i r c u i t o f t h e Output Transformer Core has n o t been f u l l y r e s e t b y t h e U n i -
bond's i n t e r n a l c i r c u i t r y ; o r ( 2 ) t h e PULSE AMPLITUDE and PULSE DURATION Thumbwheels
are improperly s e t .
2.14. O V E R L O A D PROTECTION FEATURE - I f t h e welding load draws more t h a n 1000 amps
or i f t h e output t r a n s i s t o r s a r e caused t o operate i n an unsafe r e g i o n a s a r e s u l t o f
a r a d i c a l change i n l o a d r e s i s t a n c e . t h e Unibond w i l l a u t o m a t i c a l l y t e r m i n a t e t h e o u t -
put pulse p r i o r t o t h e t i m e p r e s e t on t h e PULSE DURATION Thumbwheels and i l l u m i n a t e
the OVERLOAD INDICATOR. A n y attempt t o f i r e t h e Unibond b e f o r e t h e Output Transformer
has been r e s e t by t h e Unibond, w i l l a l s o i l l u m i n a t e t h e OVERLOAD INDICATOR.
2 . 1 5 . P O W E R REQUIREMENTS - 1 0 0 . 11 5 , 2 0 8 o r 2 3 0 Vo l t s ±13%. 50-60Hz
Uses 2 amp C i r c u i t Breaker a t 100 o r 11 5 v o l t s
or 1 amp C i r c u i t Breaker a t 2 0 8 o r 2 3 0 v o l t s .
2.16. P H Y S I C A L DATA -
HEIGHT W I D T H D E P T H W E I G H T
UNIBOND ( i n c h ) 7 . 4 1 1 . 7 9 . 2 2 0 l b s
(cm) 1 8 . 8 2 9 . 7 2 3 . 4 9 Kg
OUTPUT ( i n c h ) 7 . 5 6 . 6 8 . 8 3 6 l b s
TRANSFORMER ( c m ) 1 9 . 1 1 6 . 8 2 2 . 4 1 6 Kg
2.17. C O N T R O L S
2 . 1 7 . 1 . FEEDBACK SELECTOR - S e l e c t s e i t h e r t h e VOLTAGE FEEDBACK MODE o r VOLTAGE +
CURRENT FEEDBACK MODE.
2 . 1 7 . 2 . P U L S E AMPLITUDE - Can be p r e s e t i n 0 . 0 1 v o l t increments between 0 . 0 1 and
3.99 v o l t s . A l l o w a b l e s e t t i n g s a r e shown i n 2 . 0 2 . and o n t h e Unibond's f r o n t p a n e l .
2 . 1 7 . 3 . P U L S E WIDTH - Can be p r e s e t i n 1 m i l l i s e c o n d increments t o any v a l u e between
1 a n d 7 9 milliseconds. A l l o w a b l e s e t t i n g s a r e shown i n 2 . 0 2 .
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