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CASE bACK CONTROL
(See Figure B.2)
1. Input Power Cord Access hole.
FIGuRE b.2
1
POWER-uP SEQuENCE
When power is applied to the FX450, the displays will illuminate and display the voltage and/or amperage settings.
COMMON WELDING PROCEDuRES
MAKING A WELD
The serviceability of a product or structure utiliz- ing the welding programs is and must be the sole responsibility of the builder/user. Many variables beyond the control of The Lincoln Electric Company affect the results obtained in applying these programs. These variables include, but are not limited to, welding procedure, plate chemistry and temperature, weldment design, fabrication methods and service requirements. The available range of a welding program may not be suitable for all applications, and the build/user is and must be solely responsible for welding program selec- tion.
The FX450 is a
1.SMAW – This is a CC (constant current) weld mode used for the SMAW stick welding process.
2.GTAW – This is a CC (constant current) weld mode used for the GTAW TIG welding process.
3.CV – This is CV (constant voltage) weld mode used for welding the GMAW MIG welding process and the
4.
The FX450 is also capable of gouging. Gouging can be done in either the SMAW mode or the CV and CV- Innershield modes.
In addition to the weld process selector switch, a hot start toggle, output control dial and arc control dial are provided to setup and fine tune the welding procedure.
WELD CONTROLS AND DISPLAYS
Weld Process Selector Switch
4 Position switch used to select the welding process.
hot Start Toggle Switch
The Hot Start control regulates the starting current at arc initiation. Hot Start can be set to “Off” and no additional current is added at arc start. When set to the “On” position, additional current (relative to the preset current) is added at arc initiation.
Arc Control Dial
Full range selection of arc control from
Output Control Dial
Output control is conducted by a single turn poten- tiometer. (Adjustment is indicated by the meters.) When in Remote Mode, this control sets the maximum welding current of the remote device. For example, full depression of a foot or hand amptrol results in the pre- set level of current.
Voltage Display Meter
•Prior to CV operation (current flow), the meter dis- plays desired preset voltage value.
•Prior to STICK or TIG operation, the meter displays the Open Circuit Voltage of the Power Source or four dashes if the output has not been turned on.
•During welding, this meter displays actual average volts.
•After welding, the meter holds the actual voltage value for 5 seconds. The displays blink indicating that the machine is in the "hold" period.
•Output adjustment while in the "hold" period results in the "prior to operation" characteristics.
