Lincoln Electric FLEXTECTM 650 Operator's Manual page 27

FLEXTEC TM 650
Weld Terminals On/Remote Toggle Switch
• This switch determines the trigger location.
• When set to the "ON" position, the weld terminals
are at OCV (open circuit voltage) and ready to weld.
• When set to the "REMOTE" position, output is
enabled through a remote trigger.
Control - Local/Remote Toggle Switch
• Set the switch to "LOCAL" to control output at the
Flextec via the Output Control dial.
• Set the switch to "REMOTE" to control output via a
remote device (K857 hand amptrol or K870 foot
amptrol) connected to the 6-pin remote connector or
a wire feeder connected to the 14-pin connector.
Wire Feeder Selector Switch
• This switch configures wire feeder supply voltage in
the 14 pin connector to either 42 volt or 115 volt.
• If the switch is in the incorrect position for the
attached wire feeder, there will be no power sup-
plied to the wire feeder.
Wire Feeder Voltmeter Polarity Switch
• The switch provides a work connection for wire
feeder voltmeters. Place the switch in the position of
the electrode polarity indicated by the decal. The
switch does not change the welding polarity.
Thermal Light
• This status light indicates when the power source
has been driven into thermal overload. If the output
terminals were "ON", the output will be turned back
on once the unit cools down to an acceptable tem-
perature level. If the unit was operating in the
"REMOTE" mode, the trigger will need to be opened
before or after the thermal has cleared and closed
after the machine has cooled down to an acceptable
temperature to establish output.
Mode
CC-SMAW
CC-GTAW
CV-GAS
CV-Innershield
CV-SAW
* It is normal for the lights to alternate between colors while welding.
TABLE B.1
VRD Indicator Lights
™
OCV
While welding
OCV
While welding
VRD™ (VOLTAGE REDUCTION DEVICE)
INDICATOR LIGHT
There are 2 indicator lights on the case front of the
Flextec™ 650 above the Voltage LED Display to indi-
cate the status of VRD™ operation. As shipped, the
VRD™ function is disabled. VRD™ is enabled by set-
ting dip switches on the Control P.C. board (See
Internal Controls Figure B.3 in this Operation
Section). When VRD™ is active:
• A green light indicates the OCV (open circuit volt-
age) is less than 35V peak.
• A red light indicates the OCV is at or above 35V
peak.
• Both lights will illuminate for 5 seconds at power up.
For each weld mode, the VRD™ lights function as
shown in Table B.1:
BASIC MODES OF OPERATION
SMAW
This weld mode is a constant current (CC) mode featuring con-
tinuous control from 15 – 815 amps. It is intended for the
SMAW stick welding processes and arc gouging.
Output Control Local/Remote – When the control is set to
"LOCAL" (no remote potentiometer/control plugged into the 6
pin or 14 pin connectors), the output is controlled through the
Output Control Dial on the front of the FLEXTEC™ 650. Set
this switch to "REMOTE" when an external potentiometer/con-
trol is connected.
• When a remote potentiometer is connected, the output con-
trol on the FLEXTEC™ 650 and the remote act as a mas-
ter/slave configuration. Use the control dial on the
FLEXTEC™ 650 to set the maximum welding current. The
remote will control output from minimum to the pre-set maxi-
mum.
VRD "ON"
™
Green (OCV reduced)
Green or Red (depends on weld voltage)*
Red (OCV Not Reduced)
Weld Terminals 'ON'
Red (OCV Not Reduced)
Weld Terminals Remotely Controlled
Gun Trigger Closed
Green (NO OCV)
Weld Terminals Remotely Controlled
Gun Trigger Open
Green or Red (depends on weld voltage)*
B-8
OPERATION
VRD "OFF"
™
No lights are
active