Checks Before Starting; Connecting The Earth Cable; Practical Notes - REHM MEGAPULS 250 Betriebsanleitung

Weldable materials
Wire electrodes
Inert gas
36
Warning!
REHM welding units may only be operated and maintained by persons who
have been educated and trained to operate and maintain welding units.
6.2

Checks before starting

The prerequisites are

The unit is set up correctly in accordance with  Chapter 5, Putting into
operation

All connections (inert gas, torch connection) have been made in accordance
with  Chapter 5, Putting into operation

The appropriate maintenance has been carried out in accordance with the
maintenance interval  Chapter 8, Maintenance

The safety mechanisms and the components of the unit (in particular the
torch connector hoses) are checked by the operator and are functional.

The operator and persons involved are wearing the appropriate protective
clothing and the work area has been secured in such a way that non-participants
cannot be endangered.

6.3 Connecting the earth cable

Warning!
Make sure that the welding current is not able to flow through chains of
lifting machinery, crane lines or other current carrying parts.
Make sure that the earth cable is connected to the work piece as close as
possible to the welding area. Earth connections affixed to points further
apart reduce the effectiveness and increase the risk of electrical shocks
and stray current.
6.4

Practical notes

The practical user notes given below represent just an excerpt of the various
applications of the REHM MEGAPULS welding unit. For questions regarding
specific welding tasks, materials, shielding gases or welding equipment, see the
professional literature or speak to your REHM representative.
The REHM MEGAPULS shielding gas welding units can be used to weld various
materials, for example, alloyed and non-alloyed steels, stainless steel and
aluminium.
Various wire diameters and materials are offered and can be used for MIG/MAG
welding. The wire diameter should be chosen to suit the material thickness of the
basic material used and the welding current required. The material of the wire
electrode is selected in accordance with the basic materials and the required
quality of the weld itself. The most frequently used materials and diameters and
their specifications can be found in the professional literature.
When welding steels a mixed gas is generally used, this is made up of Argon
with 18 % CO .
2
When welding stainless steels a mixed gas is generally used, this is made up of
Argon with 2 % CO
2.
When welding aluminium pure Argon is used as inert gas.
Operation