CWS
−
D100
−
B Welding System
Weld Parameter Adjustment
2005 Swagelok Company, all rights reserved
September 2005
5-5
b.
Calculate the Maintenance using the
following formula:
Impulse current
×
“
B
”
= switch setting
For example, for a wall thickness of 0.049 in.:
58.8 A
×
0.30 = 17.64 = 17.6 A
c.
Set
MAINTENANCE
(17.6) according to the result of
the formula in step 4.b.
5.
Set
IMPULSE
RATE
to 10.
6.
Calculate the Impulse Width:
a.
Locate the wall thickness (0.049 in.) and the
corresponding “C” factor in Table 5-5.
Table 5-5 Wall Thickness and
“
C
”
Factor
Wall Thickness Range
in.
mm
“
C
”
Factor
0.015 to 0.045
0,381 to 1,143
25
0.046 to 0.083
1,168 to 2,108
35
0.084 to 0.109
2,133 to 2,769
50
b.
Set
IMPULSE
WIDTH
(35) according to Table 5-5.
Note:
If the
IMPULSE
is greater than
99.9 A, set the
IMPULSE
to 99.9.
However, use the actual value to
calculate the Maintenance.
For example, if the
IMPULSE
is
102 A, set the
IMPULSE
to 99.9,
but use 102 to calculate
the Maintenance.
Note:
Because the
MAINTENANCE
switch accepts values to only one
decimal place, you may need to
round off the number. For example,
17.64 is rounded off to 17.6.
Note:
As a general guideline, set
the
IMPULSE
RATE
between 5 cycles
per second to 25 cycles per second.
A setting of ten is a general starting
point. However, as the tube outside
diameter decreases, the Impulse
Rate value increases.
Refer to
“
Identifying Proper Welds
”
on page 5-17 to see the effect of
the Impulse Rate on the weld.