PRO WELD INTERNATIONAL ARC 800, Operation/Maitenance Manual

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ARC 8 0 0
PRO WEL D
1. A different and correctly sized chuck and ferrule grip are
needed for each different stud diameter and style that will be
welded (see PRO WELD Accessories catalog for help in this
area). The appropriate chuck, or stud holder, is inserted into
the tapered chuck adapter and tapped lightly to insure a tight
fit. The ferrule grip is inserted in the hole in the foot and se-
cured with the locking screws to hold it in place.
2. Studs must NOT bind or hang up on the foot, ferrule grip,
or ferrule during the entire stud welding process. To assure
this, the foot/ferrule arrangement must be centered in relation
to the stud to be welded. To assure centering, loosen the leg
screws that hold the foot to the legs. Place a stud in the
chuck and a ferrule in the ferrule grip. With the leg screws
loosened, the foot will move freely in all directions. Adjust
the foot so that the stud is centered in the ferrule and no con-
tact occurs between the stud and the ferrule during retraction
or forward plunge of the stud.
3. The “plunge length” is the amount of the stud exposed be-
yond the ferrule during initial set-up. Set the plunge by loos-
ening the leg adjusting screws and moving the foot until the
stud extends 1/8” to 3/16” past the end of the ferrule. Tighten
the leg adjusting screws after setting the plunge and recheck
centering to be sure the stud is aligned properly in the fer-
rule.
4. The lift height, which determines the arc length, has been
preset at the factory and will automatically lift and plunge the
stud during the welding process. “Lift”, is the distance the
gun will raise the stud above the welding surface during the
weld. This distance governs the voltage and the arc. Im-
proper lift will cause unsatisfactory welds. Refer to para-
graph 8-1 if it becomes necessary to adjust the lift height.
5. Make sure that the cables are connected to the power
will prevent gun triggering and eliminate damage to printed
circuit boards.
7.0 CONTROL PANEL DESCRIPTION
ON/OFF SWITCH
The ARC-800 is turned “ON” by turning the knob on the
switch to the “ON” position.
WELD TIME ADJUSTMENT
The weld timer regulates duration of the weld current. The
timer is calibrated in seconds from .05 to .6 seconds.
WELD CURRENT ADJUSTMENT
The weld current is adjustable 100-900 Amperes.
GUN FAULT LED INDICATOR
The gun fault LED “on” indicates a shorted gun solenoid or a
shorted control cable. The LED will stay “on” and lock out
the gun from triggering.
TRIGGER LED
The trigger LED “on” indicates a complete circuit to the unit
through the gun control cables and gun switch. This LED
will turn “on” whenever gun trigger is pressed.
8.0 WELD GUN SET-UP
8.1 Plunge Length
Figure 2
CONTROL PANEL FRONT
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