Fronius MagicWave 2600 Operating Instructions/Spare Parts List page 68

WELDING CURRENT DIAL
- For continuous adjustment of the welding current
ARC FORCE CONTROL DIAL
- Influences the short circuit amperage at the moment of drop
transfer (from electrode to workpiece)
At scale setting "0" TIG there is no increase at all in the short
circuit amperage at the moment of drop transfer (soft arc)
Range of application: TIG-DC welding, welding using rutile
electrodes (fine globules), basic sheathed electrodes in the
medium and upper amperage ranges
Note! When welded at low load, basic-sheathed elec-
trodes tend to "GET STUCK" on the workpiece.
At scale setting "10"
in amperage at the moment of drop transfer (hard arc).
Range of application: Basic sheathed electrodes (coarse-
globule), when these are to be welded in the lower amperage
range (vertical-up seams, edge hardfacing welds, root welding
etc.)
Important! When the setting on the arc force control dial is
adjusted upwards, the following may be observed when rutile,
basic-sheathed or special electrodes are being used:
- Easy ignition
- Reduction in welding misfires
- Less electrode burn-on
- Good root penetration
- Occasionally an increase in spattering
- When welding thin sheet metal the danger of "burning through"
increases
With fine-globule electrodes (titanium) the above will not be ob-
served, as metal transfer occurs without a short circuit being
produced.
V
60
50
40
30
20
10
0 50
ARC FORCE
CONTROL DIAL
Fig. 21 Effect of arc force control dial
moment of short circuiting. Welding current setting 100 A
HOT-START control dial
- Only effective in the electrode ignition phase
- Improved ignition even with electrodes where ignition is
normally more difficult
- Improved melting of the base material in the ignition phase,
meaning far fewer cold laps
- Considerable reduction of slag inclusions
- Is added to the set welding current value on a percentage
basis
there is a very considerable in-crease
100 150 200
0 5 10
on constant-current characteristic at the
200
150
100
Fig. 22 Ignition phase using HOT-START control. Welding current setting 100 A
Important! The maximum setting for the HOT-START current is
limited by the maximum circuit of the machine.
POLE-CHANGING SWITCH (only for TP mc-CEL)
Electrode-polarity switchover facility.
Important! The polarity set on the remote control unit has
priority, provided that the manual electrode cable is plugged
into the socket
polarities selected with selector button
Important! The pole-changing switch is not supported on the
TT 2600 / 2600 CEL / 3000 power source. CEL-electrodes are only
supported on the MW 2600 CEL / TT 2600 CEL power sources.
RANGE SWITCH for TIG and ELECTRODE
(only for TP mc-CEL)
Connecting the remote control unit:
- Use the remote control cable to create an electrical link bet-
ween the connecting socket
socket on the remote control unit.
- Insert the plug-in connections into the correct sockets and
screw the coupling ring on as far as possible.
- Shift the function selector button
operating mode in question
Welding without a remote control unit:
The parameters for Hot-Start and arc force are pre-set within the
machine to average (mean) values
Important! If the TPmc-CEL remote-control unit is used with the
MW 2600 CEL and TT 2600 CEL power sources, the output
characteristic changes (drooping curve).
A
250
16
A
0
. If no remote-control unit is being used, the
on the power source and the
1.0 t sec
apply.
into the right position for the