Kemppi MLS 3000 ACDC VRD User Manual

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3. MiX Tig (mixed current aC/DC-)

With mixed current frequency and balance of alternating current are determined by

adjustments made for AC-current. Adjust by choosing sections 4. – 5. if needed.

The following QuiCk seTup parameters can be adjusted:

AC-time (AC 10 ... 90 %, factory setting 50 %)

Cycle time (CYc 0.1 ... 1.0 s, factory setting 0.6 s)

DC-current (DC(-) 50 ... 150 %, factory setting 100 %)

Balance (bAL -50 … 0 … +10 %, factory setting –25 %)

Frequency (FrE 50 … 250 Hz, factory setting 60 Hz)

Selection of AC waveform, sine or square wave (SinuS/SquArE)

Hot Start time for the 2T function (H2t 0.1 s…5.0 s, factory setting 1.0 s). Can be seen only on

the 2T function.

Factory setting is marked with a dot after the numeric value.
Growing DC-current increases penetration but decreases cleaning effect.

4. DC- (or DC+) (direct current)

Hot Start time for the 2T function (H2t 0.1 s…5.0 s, factory setting 1.0 s). Can be seen only on

the 2T function. You can see recommended diameter for electrode by pressing QUICK SETUP

-button. Diameter depends on current adjustment.

HF/contact ignition in Tig welding (water fill)

TIG arc can be started either with high frequency (HF) or with contact ignition. HF ignition is

chosen by pressing the HF CONTACT button to turn on the HF light.
If you use water-cooled torch you can fill it with water by pressing the HF CONTACT button for

more than 2 seconds. The display reads ’COOLER’.

welding torch switch 2T function

Gas flow starts when the torch switch is pressed. Welding starts, and the current will rise to

the Hot Start current within the up-slope time, remain at that level for the set time (H2t) and

then change to the welding current. The Hot Start function can be disabled and green panel

light switches off when the Hot Start current is adjusted to 100 %. The current will then rise

directly to the welding current level within the up-slope time. Release the torch switch, and

the current starts to drop, and after the selected down-slope time the arc is broken. After this,

the shield gas will flow for the time selected.

welding torch switch 4T function

Gas flow starts when the torch switch is pressed. Release the torch switch. The ignition spark

ignites the arc, and the current will rise to the Hot Start current within the up-slope time. You

can switch from Hot Start current to welding current with a short press of the torch switch.

You can disable the Hot Start function by adjusting the Hot Start current to 100 %. The current

will then rise directly to the welding current level within the up-slope time.
Press the torch switch down, and the welding continues. Release the torch switch, and the

current starts to drop and after the selected down-slope time the arc is broken. After this, the

shield gas will flow for the time selected.

remote control

If you choose to adjust the welding current with a remote control unit you need to connect

the unit and select the remote control selection button. The PANEL light switches off, and

you can select the unit (R10, foot pedal control R11F, or torch control). The foot pedal control

works only in 2T mode. Hold the remote control selection button (LO/HI) down to adjust the

limits of the remote control’s adjustment range.

adjustment of parameters

To select TIG welding parameters you only need to use two buttons: arrow-left and arrow-

right. Red panel light shows parameter you have chosen. Adjustment is done with the control

knob. When pressing the RETURN button, adjustment of parameters goes straight to welding

current. The display shows automatically numeric values and the units of the parameters.

When you adjust the parameters, you can see the value on the numerical display. After 10

seconds, the display will return to the welding current.

ast

Tig MLS 3000, 3003 A

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