EWM SATURN MIG 300 PROGRAM - Sequence of Functions 2-Stroke; Sequence of Functions 4-Stroke

6 Description of M201 control
6/10
6.8.2 Sequence of functions MIG 4-Step
I
m/min
t
t
t
t
Wire
Creep- feed
Torch Trigger
pressed
(not) pressed
flowing
(not) flowing
Gas
Welding Power
1st Stroke 2nd Stroke 3rd Stroke 4th Stroke
Gas
Pre- flow Time
Gas-
Post- flow Time
wire- feed
Wire-
Burn- back
Fig. 6/5; Sequence of functions MIG 4- Stroke
1st Step
Press and hold torch trigger (until the arc is struck)
• Shielding gas flows out of torch
• 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
If welding is interrupted for more than 3 sec., the wire-feed, welding voltage and gas are
switched off!
3rd Stroke
Press torch trigger (has no effect)
4th Stroke
Release torch trigger
• Wire-feed motor stops.
• The arc is switched off after the preset wire burn-back time.
• Gas after-flow time runs.