16 – Kempomig Feed 420R, 120R / 0429
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COPYRIGHT
KEMPPI
OY
3.10. WIRE INCH SWITCH
The wire inch switch starts the wire feed motor without starting the power
source and without opening the gas valve.
3.11. GAS PURGE SWITCH
The gas purge switch opens the gas valve without starting the wire feed
motor and the power source.
3.12. FEED 420R ERROR CODES
By every start possible error states in equipment are checked. If an error state is found, the error
in question is shown with an E text appearing in the panel display.
Here are some error codes:
E.09: Overloading of wire feed motor, which can be e.g. due to blocked wire guide tube of
gun, or too sharply bent gun cable.
E.12: The welding is prevented because the shielding gas control of the gas guard GG 400
has
released.
The error codes disappear by following start, if reason of the error code is eliminated.
4. ACCESSORIES
4.1.
SYNCHRONIZING UNIT SYNC 400
By means of Sync 400 you can connect the push-pull gun to the Feed 420R wire feeding control
unit. Push-pull gun is most commonly used for feeding of aluminium wires. Push-pull gun
enables extending the working radius up to 10 m. Sync 400 is mounted into electronics case of
Feed 420R. Mounting of Sync 400 is described in the mounting instructions delivered with the
unit.
4.2.
GAS GUARD GG 400
With gas guard accessory you can prevent weld defects due to lacking or wrong fl ow of
shielding gas. Functions of gas guard are as follows:
– Prevention of welding if the gas pressure is not suffi cent on the wire feeder unit.
– Stopping of welding if shielding gas pressure disappears during welding.
– When gas guard has prevented welding, error message E.12 appears on welding panel
displays.
– Shielding
gas
fl ow meter / regulator. Regulation range 5-25 l/min. Display is calibrated for
shielding gas Ar CO
2
(75 % Ar, 25 % CO
2
)
4.3.
HANGING ONTO BOOM
The lift hook is mounted to handle of Feed 420R. The position depends on the lift hook hole
position.
