CIGWELD TRANSTIG 300 AC/DC, Service Manual, Page: 37 / 134

SERVICE MANUAL TRANSTIG 300 AC/DC
June 30, 2008 6-3
6.03 Slope Mode Sequence
Weld Current
Down
Slope
Up
Slope
Initial
Current
Switch
Closed Switch
Open Switch
Closed Switch
Open
Preflow
Final
Current
Postflow
Art # A-04989
Figure 6-2: Slope Mode Sequence
NOTE
Slope function operates with a Remote
ON/OFF device only
6.04 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 be 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.
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.