Welder Controls; Auxiliary Power Controls - Lincoln Electric COMMANDER 300 IM601-A Operator's Manual

B-5
WELDER CONTROLS (Items 9 through 14 )
9. OUTPUT SELECTOR SWITCH & OUTPUT
CONTROL
These two controls allow you to select between various
welding output slopes and adjust the desired welding
output. Refer to Table B.1 for a description of how
these two controls work.
Table B.1 Output Range Switch and Output Control
Functions
Switch
Sloped Output for 5 Range
Pipe Welding.
Settings
60, 90, 150,
230, 300 (Max.
current on each
setting)
Constant Current
1 Range setting
Output for
30-375 Amps
Fabrication and
General Purpose
Welding (This set-
ting also used for
TIG)
1 Range setting
Constant Voltage
12 to 40 Volts
Output for MIG
Wire or CORED
WIRE Welding
If the SELECTOR switch is positioned between settings the previ-
1
ous setting is maintained until the switch is properly positioned on
a setting.
2 CONTROL also controls O.C.V. while in the 5 sloped output ranges.
10. DIGITAL OUTPUT METERS
The digital output meters are located in the center of
the control panel between the two large control knobs.
The meters allow the output current level to be set prior
to welding in stick mode, and voltage level to be set
prior to welding in the wire modes. During the welding
process the meters display the actual output current
and voltage, within +1%, -10% accuracy.
11. WELDING TERMINALS SWITCH
The toggle switch on the control panel labeled
"Welding Terminals Always On" and "Welding
Terminals Remotely Controlled": is used to control the
operation of the "solid state contactor" which allows for
the selection of "Hot" or "Cold" welding terminals.
OPERATION
Selector Control
1
Provides a fine
adjustment of
welding current
from
Min (1) to Max
(10) within each
range
Provides Fine
Voltage
Adjustment
COMMANDER 300
With the switch in the "Welding Terminals Always On"
position the contactor is closed and the welding termi-
nals are always "Hot".
With the switch in the "Welding Terminals Remotely
Controlled" position the contactor operation is con-
trolled by an Amptrol, Arc Start Switch or some other
type of triggering device through the use of a control
cable connected to the 14-pin MS connector.
When the triggering device is pressed the contactor is
closed and the welding terminals are "Hot".
When the triggering device is released the contactor is
2
opened and the welding terminals are "Cold".
12. LOCAL /REMOTE
The toggle switch on the control panel labeled
"Local/Remote" gives the operator the option of con-
trolling the output at the welder control panel or at a
remote station.
For remote control the toggle switch is set in the
"Remote" position.
For control at the welder control panel, the toggle
switch is set in the "Local" position.
13. 6 - PIN CONNECTOR
The 6-pin connector located on the control panel
allows for connection of interfacing equipment.
14. WELD OUTPUT TERMINALS + AND -
These 1/2 - 13 studs with flange nuts provide welding
connection points for the electrode and work cables.
For positive polarity welding the electrode cable con-
nects to the "+" terminal and the work cable connects
to this "-" terminal. For negative polarity welding the
work cable connects to the "+" terminal and the elec-
trode cable connects to this "-" terminal.

AUXILIARY POWER CONTROLS

(Items 15 - 19 )
15. 120/240VAC RECEPTACLE
This is a 120/240VAC (14-50R) receptacle that pro-
vides 240VAC or can be split for 120VAC single phase
auxiliary power. This receptacle has a 50 amp rating.
Refer to the AUXILIARY POWER RECEPTACLES sec-
tion in the installation chapter for further information
about this receptacle. Also refer to the AUXILIARY
POWER OPERATION section later in this chapter.
16. 50 AMP CIRCUIT BREAKERS
These circuit breakers provide separate overload cur-
rent protection for each 120V circuit at the 240V recep-
tacle.
B-5
SWITCH