EWM PMW 20 Operating Instructions Manual page 23

5.7.1 Guide values for various setting parameters
For the first welding tests, the following empirical values can serve as a guide for the various setting para-
meters:
Plasma gas quantity
Shielding gas quantity
Pilot arc current
Welding current
Start current
Gas pre-flow
Gas post-flow
5.8 Wear part replacement
When the welding quality deteriorates, the cause in most cases is worn electrodes and / or nozzles. To
prevent damage to the welding torch, the replacement of wear parts must not be delayed unnecessarily.
Before starting any work on the welding torch, the welding system must be switched off and
secured against accidental re-start. All machine components must have cooled down.
The threads of the wear parts are all right-hand threads:
• To loosen parts: turn anti-clockwise
• To mount parts: turn clockwise
All screw and or plug connections can be made without tools.
When changing wear parts, all individual components must always be checked for damage or wear and
replaced if necessary. All part connections or sealing surfaces must be cleaned.
5.8.1 Deinstallation/Installation
Item Symbol
1
2
3
4
5
6
7
8
9
099-002897-EW501
22.06.2023
Description 0
Gas nozzle
Sealing ring of the gas nozzle
Plasma nozzle
Centring piece
Collet chuck
Electrode
Torch body
Torch shaft
Hose package
0.2 l/min / 0.05 gal/min
2-5 l/min / 0.5-1.3 gal/min
4-6 A
1-1.5 A/pro 0.05 mm/0.002 inch of material thickness
0.7-3 A
0.4 sec
4.0 sec
Figure 5-8
Design and function
Wear part replacement
23