Thermal Arc ARCMASTER 185 AC/DC, Operating Manual, Page: 49 / 74

ARCMASTER 185 AC/DC
Feb r ua r y 20, 2006 10-3
Description Possible Cause Remedy
11 Welding a r c cannot
be established.
A Wo r k clamp is not connected to
the wo r k piece o r the wo r k/to r ch
leads a r e not connected to the
r ight welding te r minals.
A Connect the wo r k clamp to the
wo r k piece o r connect the
wo r k/to r ch leads to the r ight
welding te r minals.
B To r ch lead is disconnected. B Connect it to the ‘
−
‘ te r minal.
C Gas flow inco rr ectly set, cylinde r
empty o r the to r ch valve is OFF.
C Select the r ight flow r ate,
change cylinde r s o r tu r n to r ch
valve ON.
12 A r c sta r t is not
smooth.
A Tungsten elect r ode is too la r ge
fo r the welding cu rr ent.
A Select the r ight size elect r ode.
Refe r to Basic TIG
Welding Guide.
B The w
r ong elect r ode is being
used fo r the welding job.
B Select the
r ight elect r ode type.
Refe r to Basic TIG
Welding Guide.
C Gas flow r ate is too high. C Select the co rr ect r ate fo r the
welding job.
Refe
r to Basic TIG
Welding Guide.
D Inco rr ect shielding gas is
being used.
D Select the r ight shielding gas.
Refe r to Basic TIG
Welding Guide.
E Poo r wo r k clamp connection
to wo r k piece.
E Imp r ove connection to
wo r k piece.
Table 10-1 (continued): TIG Welding P r oblems