122
orbitalum tools GmbH
, D-78224 Singen, www.orbitalum.com, Phone +49 (0) 77 31 792-0
(14.01.21) OW_ORBIMAT_300SW_BA_852060202_00_EN
ORBIMAT 300 SW
EnGLISH
8.6
Tacking function
1. Select the basic adjustments.
2. Use the rotary knob to select the "Advanced" option and confirm by pressing.
3. Select the "On" option for "Tacking".
The following four fields are activated:
4. Accept or adjust the suggested parameters.
5. Test the tacking function: Carry out welding on a test pipe.
6. Interrupt the test weld with "
STOP
" after the tacking phase.
7. Remove the test pipe from the weld head and assess the tacking.
8. Adjust the parameters manually if necessary.
Tack points
Number of tack points on the pipe. The system calculates the optimum position of the points from the specified number
of points and moves to them during the tacking procedure: With four tack points, the two opposite tack points (0° and
180°) come first, followed by the other points (90° and 270°).
Tack current
Presetting: High-pulse current from level 1.
During the tacking procedure, this current is switched on after the position for the respective tack point (with rotor not
moving) is reached. If the time specified under "
Tack time
" has past, the system switches to a low current (the "
Pilot
current
") and moves to the next tack point at the maximum possible speed.
X
In case of weak tacking: Lengthen the tack time or increase the tack current.
Pilot current
Current upon arriving at tack points. The pilot current should, on the one hand, be high enough so that the arc does not
cut out, and on the other hand low enough so that a melt pool does not form on the pipe surface.
[
Recommendation: Do not change the pilot current.
Tack time
Duration for the readiness of the tack current when the position is reached and the rotor is not moving.
X
In case of weak tacking: Lengthen the tack time or increase the tack current.
When a tacking procedure is carried out first, the starting point of the welding is moved.
X
Compensate for this shift by entering an angle in the "
Start position
" field (see Fig. 7.4).
The angle specified for "
Start position
" is approached by the system before welding begins. By select-
ing this angle accordingly, the starting point of welding is moved back to the original position.
X
Recommendation: Run the procedure in test mode and check the movement of the rotor when
doing so.
