Tweco Weld Sequencer - Manual (Page 31)

Manual 0-2023 25 OPERATION
D ow n s l o p e S i g n a l
I n i t i a t e d
D ow n s l o p e D e l ay
( 0 - 1 0 s e c ) A - 0 2 4 3 1
C. CP1 Current Pulser
1. Move ON/OFF switch to the ON position.
2. Adjust the PULSE RATE control knob to set desired
pulses per second (clockwise rotation increases pulse
rate).
A - 0 2 4 3 2
O n e P u l s e O n e P u l s e
3. Determine the relationship required of peak current
on time versus background current on-time in per-
cent. Set the PERCENT ON TIME knob to the appro-
priate number (1 = 10%, 5 = 50%, etc).
0
1
2
3
4 5 6
7
8
9
10 0
1
2
3
4
5 6
7
8
9
10
50%
Background ON
50%
Peak ON
75%
Peak ON
A-02433
25%
Background ON
NOTE
When sloping the pulse, PERCENT ON TIME of
peak current is not proportional to background
current on-time.
I n i t i a l a n d F i n a l C u r r e n t C o n t r o l S e t t i n g s
v s. S l o p e T i m e Fo r D i f fe r e n t S l o p e R a t e s
( S a m e U p s l o p e a n d D ow n s l o p e )
S l o p e T i m e ( s e c o n d s )
Initial or Final Current Control Setting
0 5 1 0 1 5 2 0 2 5 3 0 3 5
1 0
9
8
7
6
5
4
3
2
1
0
Rate = 10 Rate = 9 Rate = 8 Rate = 7 Rate = 6 Rate = 5 Rate = 4Rate = 3Rate = 2Rate = 1
Rate = 0
A - 0 2 4 3 0
Figure 4-8 Upslope and Downslope Rates for Initial or Final Current Settings and Slope Times