End Of Welding; Fully Manual Butt-Welding Process - HURNER WeldControl 2.0 1200 Manual De Instrucciones

technical reasons. The welder has to compensate for this drop
immediately by pushing the carriage mover lever. In this case,
the first line of Display 28 reads, "Keep the pressure."
Depending on the welding standard used or on information provided
by the pipe or fitting manufacturer, a cool-on time may be required
during which the new joint must not be exposed to external forces.
This, however, is not monitored by the hydraulic, control, and data
logging unit, for which the welding has to be considered finished
when the 7 LED is lit.
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4.3.8 End of Welding

The welding is finished at the end of the successful joining and cooling
stage. The machine releases the pressure on the pipes automatically.
4.4

Fully Manual Butt-welding Process

When you want to weld fully manually, the machine has to
be switched to Manual Mode. To do so, press the ï and ð
arrow keys simultaneously while "Next Welding" is showing
on the screen. In the manual mode, the display screen looks
Info
like what Display 31 shows.
In a fully manual welding process, pipe facing, pipe alignment check,
determination of the pressure to "drag" the carriage along and of the
joining pressure (i.e., the maximum pressure of the welding, reached
during bead build-up and joining) have to be performed in the exact
same way as in the SPG Mode (see the relevant sub-sections of Sec-
tion 4.3). The only difference is that the display does not provide any
hints as to what to do. It just works as a digital gauge indicating the
actual pressure applied to the pipes (see Display 31). It also shows the
nominal temperature the welder has to set and the actual temperature
of the heating element, and it monitors and controls the temperature
throughout the process. The parameters for proper welding have to
be looked up in the welding value tables in the appendix.
The farther the carriage mover lever is pushed to the left,
the faster the carriage closes in and the faster pressure in-
creases. The farther it is pushed to the right, the faster the
carriage of the machine moves apart, and the faster pressure
Info
decreases.
The nominal temperature, at which the hydraulic and control unit
should keep the heating element, can be changed using the ñ and ò
cursor keys. After such a change, the display shows the actual tem-
perature changing slowly to the new nominal temperature.
The welder must wait for the display to show the new nominal
temperature before using the machine!
Important
The welding proper has the four stages in the diagram below that are
explained in the following sections. It is under the welder's responsi-
bility to verify the correct welding pressures and times.
Before the welding process starts, the drag pressure has to be deter-
mined with care. Move the movable carriage apart, turn the pressure
regulator counter-clockwise as far as it will go, then bring to mover
lever to the close-in position and gradually turn the pressure regula-
tor clockwise. Watch the display and note the pressure that "drags"
the carriage sufficiently to set it in motion. This is the drag pressure
P for this welding.
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EN
HÜRNER WeldControl 2.0 1200 User's Manual
H Ü R N E R S c h w e i s s t e c h n i k G m b H
Nieder-Ohmener Str. 26
35325 Mücke, Germany
*** MANUAL MODE ***
220°C NOM. ---.-bar
219°C ACT. 016.0bar
Display 31
Version July 2020