REHM TIGER 180 AC/DC ULTRA, Руководство по эксплуатации

Страница: 25 / 68

Function description
25
4.6.17 Push and rotate knob (R-Pilot)
The push and rotate knob [8] is centrally located and can be operated by a right
handed or left handed operator. The special receptacle provides very good
protection against mechanical stress. The push and rotate knob has no end stop
so over rotation is not possible.
4.7 Operating mode
The push button [10] is used to select between the operating modes 4 cycle, 2
cycle and TIG spot welding, whereby the LEDs indicate the selected operating
mode by illuminating.
4.7.1 4 cycle operating mode
In the 4 cycle operating mode the need to permanently actuate the trigger is
omitted, enabling the torch to be guided for a longer period without fatigue.
Sequence of the 4 cycle operating mode:

1st cycle: operate the torch trigger
The protective gas solenoid valve opens
After the set gas pre-flow time has expired the arc is ignited
The welding current is at the value set for the starting current

2nd cycle: Release the torch trigger
The welding current automatically reaches the preset values for I
1
after the
selected slope-up time.

3rd cycle: Actuate the torch trigger
The current reduces to the set end crater value at the preselected current slope-
down time.
The welding current flow is at the set end crater value

4th cycle: Release the torch trigger
The arc extinguishes
The inert gas flow is in accordance with the selected gas post-flow value.
Fig. 8 : Process for 4 cycle welding
Torch trigger 1
Gas valve
Welding current
t
t
t