Tweco Weld Sequencer - Manual (Page 27)

Manual 0-2023 21 OPERATION
4.06 CS1 Current Slope Control
Descriptions
CS1 CURRENT SLOPE
A - 0 2 4 1 8
O N O F F
I N I T I A L
C U R R E N T T I M E
0
1
2
3
4 5 6
7
8
9
1 0 0
1
2
3
4 5 6
7
8
9
1 0
U P S L O P E R AT E
D OW N S L O P E
0
1
2
3
4 5 6
7
8
9
1 0
D E L AY R AT E
F I N A L
0
1
2
3
4 5 6
7
8
9
1 0
C U R R E N T T I M E
0 - 10 sec. 0 - 10 sec. weld time 0 - 10 sec.
1 2 3 4 5
Figure 4-5 CS1 Current Slope
1. ON/OFF Switch
In OFF position CS1 is taken out of the welding op-
eration. The ON position energizes the circuitry.
2. INITIAL CURRENT/TIME Control (Dual Control
Pot)
INITIAL CURRENT Control (inner knob) allows set-
ting of desired starting current from which upslope
will begin. This setting is the percentage of the differ-
ence between MAX (determined by RP1 weld current
setting) and MIN of the Power Supply current range.
Add the value of this percentage to the MIN current
to determine actual current level.
A - 0 2 4 2 2
I n i t i a l C u r r e n t
T i m e
M I N
C u r r e n t
I n i t i a l C u r r e n t
EXAMPLE
A Power Supply set at a range of 25 to 125 amps
has a difference of 125 - 25 = 100 amps. A 50%
setting is equal to 100 X 50% = 50 amps, + 25
amps min = 75 amps initial current.
TIME control (outer knob) sets the desired initial cur-
rent time before activating the upslope sequence. It is
variable between 0-10 seconds as represented by the
numbers around the knob.
3. UPSLOPE RATE Control
T i m e
( s e c o n d s )
D i s t a n c e
( A m p s )
I n i t i a l
C u r r e n t
Upslope
Pe a k C u r r e n t
A - 0 2 4 2 3
Determines rate at which current slopes up from ini-
tial setting to MAX setting. The numbers are refer-
ence points and have no predetermined value. Zero
setting reflects the slowest slope rate for a particular
current range and ten relects the fastest (refer to Fig-
ure 4-8 for details).
4. DOWNSLOPE DELAY/RATE Control
T i m e
( s e c o n d s )
D i s t a n c e
( A m p s )
Do
wnslope
A - 0 2 4 2 4
S t a r t D ow n s l o p e
S i g n a l
D e l ay S t a r t D ow n s l o p e
( 0 - 1 0 s e c )
A dual control potentiometer that controls the
Downslope Delay and the Rate. The RATE control
(outer knob) determines the rate at which the current
slopes down from MAX setting to final current set-
ting. The numbers are reference points and have no
predetermined value. Zero (0) setting reflects the
slowest slope rate for a particular current range while
ten (10) reflects the fastest rate (refer to Figure 4-8 for
details). The DELAY control (inner knob) allows the
actual start of downslope current to be delayed from
0-10 seconds after the downslope is initiated.