WTC MedWeld 3005, Operator'S Manual

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60 IMPULSE= nn HEAT CY, nn COOL CY (nn=1-99)
This function defines the length of a weld impulse. It tells the
weld processor that the next function in the schedule should
pulsation weld (providing heat cycles followed by cool
cycles, rather than just heat cycles).
When this function appears before any weld function, the
control displays IMP (impulse) rather than CY (cycles) to
indicate the weld control will pulsation weld.
Pulsation welding provides a specified number of impulses.
(An impulse is a number of heat cycles—when weld current
flows—followed by a number of cycles when current does
not flow.) Consider the following schedule:
60 IMPULSE = 10 HEAT CY, 10 COOL CY
20 WELD 04 IMP 65%I
In this example, the weld processor will actually fire for 10
cycles at 65% heat, then wait for 10 cycles with NO heat, and
repeat this pattern 4 times.
This function only affects the next function in a weld
schedule. It should appear before every weld or slope
function you want to pulsation weld in the schedule.
74 WELD nnn IMP mm %I HIGH mm %I LOW
(nn=1-999 mm=20-99)
Function #74 enables welding at two different heat settings. It
MUST immediately follow Function #60 (which defines the
length of the impulse) in the weld schedule.
The control uses the first current setting (nn %I HIGH) for the
heat cycles of the impulse. The second heat setting (nn %I
LOW) defines the amount of heat to provide during the cool
cycles of an impulse.
99%
20%
%I
10cy 10cy 10cy
10cy
10cy
10cy
10cy
65%
IMPULSE=10 HEAT CY, 10 COOL CY
WELD 04 IMP 65%I
Time (Cycles)