Tweco 200 ACDC Arcmaster(Feb2006) - Manual (Page 36)

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6.02.01 Slope Mode Sequence
Note 7
Slope function operates with a Remote ON/OFF device only.
1) To start Slope sequence Close remote switch contacts. Once the welding arc is established the Power
Source will maintain initial current setting as long as the remote switch contacts are closed.
a) In the HF TIG mode, after Preflow time, High Frequency is present at the torch. When the torch is
positioned close to the work the welding current will transfer to the work and establish the arc at the
initial current setting.
b) In the Lift TIG mode, after Preflow time, Lift Start current is present at the torch. When the electrode is
touched to the work and lifted off, the welding arc is established at the initial current setting.
2) Open Remote Switch – Current increases to weld current. Once welding arc has reached weld current the
power source will maintain weld current as long as the remote switch contacts are open.
3) Close Remote Switch – Welding current decreases to final current setting. Once final welding current is
reached the power source will maintain final current setting as long as the remote switch contacts are
closed.
4) Open Remote Switch – Welding arc stops and post flow begins.
6.02.02 Slope Mode with Repeat Sequence
The repeat function is operated during the down slope cycle of the Slope Sequence and is active through the
down slope period only. During the down slope period by opening the Remote Switch contacts the current will
increase back to weld current. Within the Down Slope period the repeat function can operated as many times as
desired. To continue slope cycle and end slope sequence close remote switch contacts and allow weld current to
reach final current setting. Once final current setting is reached opening the Remote Switch again will turn off the
welding arc and post flow begins.
Weld Current Down
Slope
Up
Slope
Initial
Current
Switch
Closed Switch
Open Switch
Closed Switch
Open
Preflow
Final
Current
Postflow