Fronius MAGIC WAVE 2000 FUZZY Mode D'emploi page 33

MAINS ON/OFF SWITCH
(see Fig. 12)
A
DIGITAL AMMETER
l This indicator permits precision fine adjustment of the main
current.
l The command and actual values are compared internally by
the electronic controler.
V
DIGITAL VOLTMETER
The welding voltage can be read off from this indicator during
welding.
FUNCTION SELECTOR SWITCH for
a) 2-step operation
a) 2-step operation
}
b) 4-step operation
c) 2-step operation
}
d) 4-step operation
If either of these two switch positions is selected, the machine
automatically switches over to the constant-current characteri-
stic necessary for TIG welding (= soft arc).
This puts the arc force control and hot-start devices out of action
(they may also no longer be influenced via the TPmc remote
control unit).
- When the TR 50mc, TR 51mc and TR 52mc remote-control
units are used, the system switches over to the operating
mode in question automatically - the respective LED indica-
tor or lights up.
e) Manual electrode welding
When this switch position is selected, the welding characteri-
stics are governed by the values for ARC FORCE and HOT-
START which are fixed in the machine itself. It is possible to
influence these parameters from outside via the TPmc remote
control unit and the inert menue at function selector switch
position .
(See description of TPmc remote control unit on p. 18,19)
- After this operating mode has been selected, LED indicator
lights up and the digital voltmeter indicates the open-
circuit voltage.
LED INDICATOR for manual electrode welding
- Symbol is selected with the function selector switch
- LED indicator does not light up (for main current I
(only at welding)
- Welding current is present in the current sockets
- Welding current is either adjusted internally with the main
current regulator , or via the dial
control unit (TR53mc is also suitable for manual electrode
welding).
LED INDICATOR for contact ignition:
- Lights up together with either LED
- Select via function selector switch
- To ignite the arc, touch the workpiece with the tungsten
electrode after pressing the torch trigger.
- The short-circuit current flowing when contact is made
between the electrode and the workpiece corresponds to the
minimum current.
Where to use contact ignition: Whenever the HF used in
contact-free ignition would cause external interference.
(See "EXTERNAL INTERFERENCE" on p. 7)
TIG-welding with
=
HF-ignition
TIG-welding with
=
contact ignition
)
H
,
on the TPmc remote
or LED
LED INDICATOR FOR 4-STEP MODE
4-step mode
- In the manual or automatic welding modes, for flawless
welding joints
- Pre-settable parameters such as gas pre-flow, start arc,
upslope time, main current, downslope time, crater-fill cur-
rent and gas post-flow time
- In the "PRESETTINGS LEVEL ___" program level (TIG
parameters), SFS must be set to OFF
Functional sequence:
1. Pull back and hold trigger
- Gas pre-flow time elapses
- Arc ignites with the pre-set start-arc current I
touchdown ignition; HF cuts out automatically after the
ignition cycle)
- LED lights up
2. Release trigger
- Welding current rises via the pre-set upslope to the value set
on dial for the welding current I
- LED lights up
3. Pull back and hold trigger again
- Welding current drops via the downslope set on dial
to the value set for the crater-fill current I
- LED lights up
4. Release trigger
- Arc goes out
- Internally pre-set gas post-flow time elapses
4-step mode - Variant I
- Activated from TIG torch trigger with double-pushbutton
function
- Welding current can be lowered from the main current to the
reduced current I and back, without interrupting the welding
E
sequence
- In the "PRESETTINGS LEVEL___" program level (TIG
parameters), SFS must be set to OFF
Practical tip:
- Current reduction with no interruption to welding is only
possible when the main current is activated
- If the torch trigger is accidentally pushed forward in open
circuit, no ignition cycle takes place
Special 4-step mode - Variant I
- Enables the 4-step mode to be activated from TIG torch
triggers without the double-pushbutton function
- Welding current can be lowered from the main current to the
reduced current I and back, without interrupting the welding
E
sequence
- In the "PRESETTINGS LEVEL___" program level (TIG
parameters), SFS must be set to 1
Special 4-step mode - Variant II
- Enables the 4-step mode to be activated from TIG torch
triggers with the double-pushbutton function
- In the "PRESETTINGS LEVEL___" program level (TIG
parameters), SFS must be set to 2
9
(by HF or
S
H
on dial
E