Ac/Dc Tig (Constant Current) Welding - Lincoln Electric RANGER SVM148-B Service Manual

B-12
CAUTION
DO NOT change the RANGE switch setting while
welding. This can result in damage to the switch.
RANGE SETTING
ON MACHINE
50
75
100
140
180
225
300
FIGURE B.4
WELDING CIRCUIT CONNECTIONS
8
1. OUTPUT CONTROL PANEL
2. ELECTRODE CABLE
3. ELECTRODE HOLDER
4. ELECTRODE
5. OUTPUT TERMINALS
6. WORK
7. WORK CLAMP
8. WORK CABLE
OPERATION
ACTUAL
CURRENT RANGE
30 to 50 AMPS
50 to 75 AMPS
70 to 100 AMPS
95 to 140 AMPS
110 to 180 AMPS
130 to 225 AMPS
160 to 300 AMPS
1
E F
5
6 4
3
7
2
RANGER 300 D AND 300 DLX
AFTER YOU FINISH WELDING:
1. Stop the engine.
2. Allow the electrode and work to cool completely.
3. Remove the work clamp from the work.
4. Remove any remaining piece of electrode from the
electrode holder.
5. If you are finished using the RANGER 300 for weld-
ing, disconnect the welding cables from the weld
output terminals. Reattach the flange nuts and
leave them on the terminals.
AC/DC TIG (CONSTANT CURRENT)
WELDING
1. Connect the K930-1 TIG Module to the RANGER
300. Follow the installation instructions provided
with the kit.
2. Refer to the instruction manual with the TIG mod-
ule (IM-528) for operation with a RANGER 300 and
proper machine settings.
3. Set the RANGE switch to the appropriate setting
for the electrode you are using. Refer to IM-528
with the TIG module or refer to Table B.2 for AC
TIG welding.
4. Set the POLARITY SWITCH to the desired polarity.
5. Do not AC TIG weld on the 300 AC range setting.
The output current may exceed the rating of the
RANGER 300.
6. Start the arc and begin welding.
NOTE: When using the RANGER 300 for AC TIG weld-
ing of aluminum, the TIG Module is to be set for CON-
TINUOUS HF.
AFTER YOU FINISH WELDING:
1. Stop the engine.
2. Allow the electrode and work to cool completely.
3. Remove the work clamp from the work.
B-12