Tweco HMC-410 - Manual (Page 27)

HMC-410
July 27, 2005 2-9
17. POWER ON/OFF SWITCH — This switch controls only
the control panel and not the power source (welding
machine). It is used as an on/off switch and also serves
as a circuit breaker. NOTE: If the circuit breaker trips,
it turns the power switch to the OFF position. A short
cooling period must be allowed before an attempt is
made to reset the unit by placing the switch in the ON
position.
18. INCH BUTTON—Depressing the inch button will feed
wire (without the flow of gas) at a speed programmed
into the Run In section of the weld schedule; the weld-
ing wire WILL NOT be electrically “hot”. This button
has no effect during a weld.
19. TRIGGER HOLD SWITCH (OPTIONAL) — This optional
switch selects either 2 Step or 4 Step gun switch mode
of operation for semiautomatic applications (to change
the operation of this switch, refer to the Operation -
Softswitch Description chapter of this manual). A de-
tailed theory of operation for both modes of opera-
tion is given in the Operation chapter of this manual.
20. SUB SEGMENT ENABLE SWITCH (OPTIONAL) — This
optional switch disables or enables the sub segment
mode of operation for semiautomatic applications (to
change the operation of this switch, refer to the Op-
eration - Softswitch Description chapter of this
manual). A detailed theory of operation for the sub
segment mode of operation is given in the Operation
chapter of this manual.
21. CYCLE START BUTTON — This button is used to start
the weld cycle. When pressed, the control panel ad-
vances to the preflow section of the weld cycle. De-
pressing this button while in a weld cycle has no ef-
fect.
22. PROGRAM/WELD SWITCH — When this switch is in
the program mode, weld parameters can be changed.
When this switch is in the weld mode, weld param-
eters cannot be changed.
NOTE
The functionality of this switch can be changed
in the softswitch screen and/or with different
software upgrades. Refer to the Operation and
Option chapters of this manual for further de-
tail.
23. CYCLE STOP BUTTON—This button is used to stop a
front panel initiated weld cycle. When pressed, the
control panel leaves the weld section and enters the
crater fill section of the weld cycle. When a weld is
stopped with the cycle stop button, the control panel
skips over the recycle section of the weld cycle.
NOTE
Depressing this button ONLY stops the weld
cycle if the weld cycle was started with the
cycle start button. This button WILL NOT stop
a weld cycle that was started with a gun switch
closure, remote pendant, or auxiliary fixture.
24. LOWER ENCODER—This encoder changes param-
eters displayed in the lower display. Turning this en-
coder clockwise increases the value of the parameter
and counterclockwise decreases the value of the pa-
rameter.
25. MODE SELECT ENCODER — This encoder serves two
functions. While not welding, the encoder selects the
desired section of the weld cycle for parameter input
and viewing. While welding, the encoder selects
whether actual wire feed speed (WFS) or actual weld-
ing current (AMPS) is shown in the lower display.
26. RECYCLE LED — When lit, the control panel is in the
recycle section of the weld cycle.
27. POST-FLOW LED—When lit, the control panel is in
the post-flow section of the weld cycle.
28. BURNBACK LED—When lit, the control panel is in the
burnback section of the weld cycle.
29. CRATER FILL LED — When lit, the control panel is in
the crater fill section of the weld cycle.
30. WELD LED — When lit, the control panel is in the
weld section of the weld cycle.
31. RUN IN LED — When lit, the control panel is in the
run in section of the weld cycle.
32. Preflow LED — When lit, the control panel is in the
preflow section of the weld cycle.
33. READY LED — When lit, the control panel is in the
ready section of the weld cycle.
34. CENTER ENCODER — This encoder changes param-
eters displayed in the center display. Turning this en-
coder clockwise increases the value of the parameter
and counterclockwise decreases the value of the pa-
rameter.
NOTE
The (Arc Hours X1) information cannot be
changed with the center encoder. To reset the
count to 0, refer to the Operation - Softswitch
Description chapter of this manual.