Sequence Of Functions In Operating Modes - EWM SATURN MIG 200 Operating Manual

6 Description of M201 control
6.8 Sequence of functions - Operating modes
6
.8.1 Sequence of functions MIG 2-Step
1st Stroke
pressed
Torch Trigger
(not) pressed
flowing
Gas
(not) flowing
I
Welding Power
m/min
wire- feed
Gas
Pre- flow Time
1st Step
Press and hold torch trigger
•
Shielding gas flows out (Gas pre-flow)
•
Wire feed motor runs at "Creep speed"
•
The arc strikes once the welding wire hits the workpiece, welding current flows.
•
Change over to pre-selected wire-feed speed.
2nd Stroke
Release torch trigger
•
Wire-feed motor stops.
•
The arc is switched off after the preset wire burn-back time.
Advantage:
•
Gas after-flow time runs.
Wire
Creep- feed
Fig. 6/4; Sequence of functions MIG 2- Stroke
Prevents the wire becoming stuck in the weld-pool.
6/9
2nd Stroke
Wire- Gas-
Burn- back Post- flow Time
t
t
t
t