Heating Stage; Change-Over Stage - Hürner CNC ECO 1200 2.0 Manuel Utilisateur

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the operator has to press START/SET (or the movement push-
button on the chassis, if provided) to terminate the build-
up stage, unless the Automode (see above) is used. The ma-
chine then moves on to the heating, or heat-soaking, stage.
As long as the nominal pressure of the heating stage is not
reached yet, LED 2 flashes while LED 1 is lit. The machine re-
duces pressure automatically.
4.3.5

Heating Stage

The time for soaking heat in the heating stage is displayed
as a countdown showing the remaining seconds (see Dis-
play 26). A signal is audible during the final 10 seconds of
heat soaking, right before the change-over stage. During
the heating stage LED 3 flashes; LED 1 and LED 2 are lit.
During this stage, the pressure applied while the pipes soak
heat, and the heating element temperature are monitored
and controlled.
The machine also moves on to the heating stage if in the Au-
tomode the welder ends the build-up stage by pressing the
START/SET key (or the movement pushbutton on the clamp-
ing chassis, if provided) before the countdown of the bead
build-up stage is completely over – which may happen if
the bead is o. k. earlier than expected. In this case, the bead
build-up time shortened by the early end is saved to memo-
ry as the build-up time for this welding and will be used as a
reference for possible automode-managed build-up stages
at a later time.
Full contact has to be continuously established be-
tween the heating plate and the bead, even with
lower pressure. While heating, if contact between
Important
them is lost somewhere along the circumference,
welding has to be aborted and repeated.
4.3.6

Change-over Stage

After the full heating time, the carriage moves apart auto-
matically. The heating element (hot plate) has to be removed
as fast as possible (see Display 27). On machines equipped
with an optional automatic heating element, it retracts au-
tomatically from in-between the pipes. During the change-
over stage LED 4 flashes; all previous LEDs are lit.
The machine then presses the pipes automatically together.
4.3.7 Joining and Cooling Stage
In the joining stage the machine increases pressure in ac-
cordance with the pressure ramp computed for the joint
(see Display 28). During this stage LED 5 flashes; all previous
LEDs are lit.
Version October 2021 HÜRNER CNC ECO 1200 2.0 User's Manual
HEAT SOAK PHASE
Heat Soak Time :148s
230°C MAX 5.0bar
229°C ACT. 3.5bar
Display 26
Remove plate
Change-over : 8 s
230°C MAX 5.0bar
229°C ACT. 3.5bar
Display 27
JOINING PHASE
230°C NOM. 16.5bar
229°C ACT. 14.5bar
Display 28
EN
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