User Guide

B-9
OPERATION
B-9
WIRE REEL CHANGING
At the end of a coil, remove the last of the old electrode
coil from the conductor cable by either pulling it out at
the nozzle end of the gun or by using the following pro-
cedure:
1) Cut the end of the electrode off at the gun end. Do
not break it off by hand because this puts a slight
bend in the wire making it difficult to pull it back
through the nozzle.
2) Disconnect the gun cable from the gun connector on
the STT-10 wire drive unit and lay the gun and cable
out straight.
3) Using pliers to grip the wire, pull it out of the cable
from the connector end.
4) After the electrode has been removed, reconnect
the gun cable to the drive. Load a new reel of elec-
trode per the instructions in “Wire Reel Loading” in
this section.
WIRE FEED OVERLOAD PROTECTION
The STT-10 has solid-state overload protection of the
wire drive motor. If the wire drive motor becomes over-
loaded for an extended period of time, the protection cir-
cuitry turns off the power source, wire feed and gas
solenoid, and then displays “H30” on the WFS display
(with blank Voltage display). This indicates the wire
drive motor is overloaded and will remain shut down for
about 30 seconds before the unit will automatically
reset. The “H30” display decrements every second until
it reaches “H00”. At that time, the unit resets automati-
cally and the previous displays will return indicating the
unit is ready to operate again. Overloads can result from
improper tip size, liner, drive rolls, or guide tubes,
obstructions or bends in the gun cable, feeding wire that
is larger than the rated capacity of the feeder or any
other factors that would impede normal wire feeding.
(See “Avoiding Wire Feeding Problems” in the MAINTE-
NANCE section).
GROUNDING LEAD PROTECTOR
The frame of the STT-10 Control is grounded to the
frame of the power source by a lead in the control cable.
An overload protector prevents welding current from
damaging this lead if the electrode circuit touches the
wire feeder frame while the electrode is electrically hot.
If such a grounding lead fault occurs, the WFS display
will show “GLP,” (with blank Voltage display) and the
trigger circuit will be disabled. To reset the circuit,
release the trigger, make sure that the electrode is not
touching the wire feeder frame, and then either press
any key on the keypad or close the trigger. When the
GLP circuit is reset, the “GLP” display is removed and
the wire feeder is returned to normal operating mode.
STT-10
EXPLANATION OF PROMPTING
AND ERROR MESSAGES
Display Prompt or Error
Acc Displayed on top display, indicates WFS
display is showing acceleration setting, “1"
to “5" (See “Acceleration Selection” in this
section).
SEC Displayed on WFS display, indicates
Voltage display is showing a Timer setting
in seconds. (See “Display Control Keys” in
this section)
GLP Displayed on WFS display, indicates that
the Grounding Lead Protector circuit was
activated due to excessive current flow into
the wire feeder frame. When the GLP cir-
cuit is activated the wire feeder is disabled
(the trigger output to the power source is
opened up, the motor is stopped, and the
gas solenoid is turned off). To resume nor-
mal operation, release the trigger, make
sure that the electrode is not touching the
wire feeder frame, and then either press a
key on the keypad or close the trigger.
(See “Grounding Lead Protector” in this
section)
Cld Displayed on top display when Cold Feed
Forward or Cold Feed Reverse Key is
pressed, or Cold Feed Trigger mode is
selected. Indicates wire is fed “cold” (no
weld voltage) at the speed indicated on the
WFS display. (See “Operation Keys” and
“Trigger Mode Selection” in this section).
--- Displayed on bottom display with RUN-IN
selected, indicates setting will match those
set for Wire Feed Speed (See “Display
Control Keys” in this section).
HXX Displayed on WFS display, indicates wire feed over-
load. XX indicates time remaining in seconds before
unit resets automatically. (See “Wire Feed Overload
Protection” in this section and “Avoiding Wire
Feeding Problems” in the MAINTENANCE section).
Er EEPROM error. Usually occurs at power-up.
Indicates one or more of the recalled settings is out
of acceptable limits. Press any key to return to nor-
mal operation. Be sure to check all current, wire
feed speed, acceleration and timer settings before
you proceed.