Operation
ORBIMAT CA
| Operating instructions
34
orbitalum tools
GmbH, D-78224 Singen, www.orbitalum.com, Tel. +49 (0) 77 31 792-0
(09.03.15) OW_ORBIMAT_CA_BA_871060202_04_EN
X
When using closed weld heads, ensure that the same gas type is used both outside and inside the
pipe, i.e. the same gas both for the machine (weld head) and that which is fed into the pipe.
Different gas types can lead to an undefined mixture of both gases in the welding pocket and thus to
uneven weld penetration.
[
Do
not
use "classic" forming gases with up to 30% hydrogen content.
A small amount of hydrogen which ends up in the welding pocket from inside the pipe via the pipe joint
can lead to considerably greater penetration, as the hydrogen releases additional energy during com-
bustion.
Values gained from experience: An admixture of only 2% hydrogen has roughly the same effect on pen-
etration as a 10% increase in weld current.
8.2.5
Welding
Starting the welding process
X
Before beginning, read "
Interrupting the welding process
" (see chap. 8.2.6, p. 36) so that you can take action im-
mediately in case irregularities arise during a test run.
D
Power source programmed.
D
Weld heads prepared for welding: Properly connected and positioned.
D
Gas bottle secured and opened.
D
Machine switched on.
D
The main menu appears in the display.
X
Press softkey 1 "
Weld
".
The machine is ready to start. The "
Start
" button in the display is red.
X
Press softkey 1 "
Start
".
– or –
X
Press START button on an external remote control, if connected.
– or –
X
Press red START/STOP button on weld head.
The water pump starts up, and the solenoid valve is opened. After the programmed gas pre-flow time passes, the arc is
ignited and the welding process begins.
The machine carries out the welding process completely.
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Observe welding process continuously and be prepared to take action at any time.
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With open weld tongs: Ensure proper guidance of the hose assembly while the rotor is circling.
Possible problems with the welding process:
• Incorrectly set weld current
• LP weld tong not tensioned tightly enough
• Forming gas quantity too high, holes being formed.
X
In these cases, interrupt welding process (see chap. 8.2.6, p. 36).
Welding process – Sequence
The machine carries out the welding process completely. During the welding process, the machine monitors the welding
process and the following parameters:
• Cooling water flow: The welding process is stopped if the limit value of 0.8 L/min is undershot.