ROTHENBERGER ROWELD D 2/10 - Manual (Page 28)

26 ENGLISH
• The Start switch of the drive unit may only be operated after the operating tem-
perature has been reached and the startup timer has timed out. Otherwise, the hand extrud-
er may be damaged by solidified material still present in the machine. The hand extruder is
equipped with a start interlock which prevents starting of the drive before the melting tem-
perature of the welding rod is reached. For temperature settings, see “Temperature chart for
Extruder”.
5.4 Welding with the hand extruder
Observe section “Safety” and the data sheet.
General:
Welding is to be carried out in accordance with the guidelines of the German Association for
Welding Technology (Deutscher Verband für Schweißtechnik DVS).
The parts to be joined and the welding rod must be clean and dry.
5.4.1 Introducing the welding rod
• The hand extruder is provided with a bore for introducing the welding rod.
5.4.2 Replacement and aging of welding rod
• If the welding rod is to be replaced, make sure that any remaining rod in the hand extruder is
completely removed.
• For this purpose, operate the preheated hand extruder with the new welding rod until clean
new material discharges.
• The DVS guideline also recommends this procedure for hand extruders which have been
out of service for prolonged periods while still being filled with welding rod.
Ensure safe and environmentally compatible disposal of any waste generated!
5.4.3 Welding direction / rate
• The pressure of the discharging extrudate causes the welding shoe (and hence, the hand
extruder) to move in welding direction.
• See DVS Guidelines for the welding rate.