TECNA
S.p.A.
ITEM
TE700 Instruction
Manual
CHAPTER 10 –
DOUBLE STROKE FUNCTION
In addition to the 3 solenoid valves that are part of the work cycle, the control unit manages a
fourth solenoid valve aside from the work cycle to command the double stroke, which is also
called the approach stroke.
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does not deactivate and the electrode remains in
osition "B" as shown in the figure below.
The input (D.STROKE) enables the output of solenoid valve EV4, to control the
DOUBLE STROKE, and keeps it enabled separately from the work cycle; the output
remains enabled even when the WORK - PROGRAM key is switched to PROGRAM
position.
On turning on the machine, with input (D STROKE) active, the output is disabled. In this case,
during the first welding the control unit activates solenoid valve EV4 (that switches the
electrode from position "A" to position "B") before the work cycle begins. Then the
programmed welding cycle is carried out, on the elapsing of a fixed time of 0.6 seconds.
When the cycle is over, solenoid valve EV4
p
Later on, by keeping the input activated (D.STROKE), the work cycles will be carried out
tarting from position B.
will be disabled at the end of the cycle only if the input is deactivated during the weld
g the weld cycle, the output will be enabled only on issuing the
next cycle-start command.
s
In order to disable the EV4 double stroke output, simply deactivate the input (D.STROKE); the
output
cycle.
If the input is enabled durin
