Lincoln Electric INVERTEC V200-T Bedienungsanleitung PDF herunterladen (Seite 18)

B-6

OPERATION

B-6

EXPLANATION OF 2 STEP AND 4

STEP MODES

(See figure B.2 and the explanations that follow)

2 STEP

2 Step mode can be used with either an arc start

switch or a hand or foot amptrol. The welding cycle

begins when the torch switch is held closed and ends

when the switch is released.

4 STEP

4 Step mode should only be used with an arc start

switch. The welding cycle begins when the torch

switch is pressed and then released. The cycle is

ended by a further press and release of the switch.

The pre-gas flow is followed by an increase in the

welding current from the level set by the Start/Crater

Current Potentiometer, to the value on the display

set with the Welding Current Potentiometer. The

rate of increase is determined by the setting of the

Slope Up Time Potentiometer.

The slope out phase begins with the release of the

torch switch in the 2 STEP mode or with a second

press of the switch in the 4 STEP mode.

During this phase, the welding current falls to the

crater current set on the Start/Crater Current

Potentiometer. The speed at which the welding cur-

rent decreases is determined by the setting of the

Slope Down Time Potentiometer.

The power source comes equipped with a restart

capability. Any change required in the restart timing

can only be made by an authorized service center.

(See Figure B.2 - 4 Step Mode).

In the TIG-SPOT mode the UP/ DOWN-SLOPE con-

trols and the PULSER function are disabled.

The welding cycle takes an "ON-OFF" type shape with

the welding current jumping very rapidly from 0 to the

nominal value.

PULSER FUNCTION

Pulsed welding is selected by using the TIG Process

Switch. In this mode the output is modulated to pro-

duce a series of current pulses. By this means pre-

cise control of heat input and penetration can be

achieved on critical applications. The pulse frequency,

duration and amplitude may be adjusted by means of

the respective potentiometers.

INVERTEC V200-T

2 STEP MODE

TORCH

SWITCH

WELDING

CURRENT

TORCH

SWITCH

WELDING

CURRENT

4 STEP MODE

TORCH

SWITCH

WELDING

CURRENT

TORCH

SWITCH

WELDING

CURRENT

WITHOUT RESTART

WITH RESTART (As shipped

no jumper)

CRATER CURRENT

FIGURE B.2 2 Step and 4 Step Modes

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 31 32

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