PAD 3 - Esab.com
Contents
1. Kortpulsdon Pulsed arc device Kurzpulsationsschweiss steuerung Coffret de pulsations courtes Bruksanvisning och reservdelsf rteckning Instruction manual and spare parts list Betriebsanweisung und Ersatzteilverzeichnis Manuel d instructions et liste des pieces detachees 320 865 032 IANEH LLSF RTECKNING Sida Teknisk beskrivniMG oooooo 5 DEIFT sense Kurva svetsstrim ooooooo 13 Reservdelsf rteckning 14 LIST OF CONTENTS Page Technical descripti0N o oo operat ION ee Curve Welding current 13 Spare parts liSt ooooooooo 14 INHALTSVERZEICHNIS Seite Technische Beschreibung 9 Betried sessosessssososooae LU Kurve Schweisstrom cecccecsla ErsatzteilverzeichniS 14 SOMMA IRE Page Description technique o oo l1 Mise en marche ooooooooooooooolZ Courbe Courant de soudage 13 Liste de pieces d tach es 14 R tt till Ardring av specifikation f rbeh lles Rights reserved to alter specifications without notice Anderungen vorbehalten Sous r serve de modifications sare avis pr alable F r inneh llet i denna trycksak ansvarar Dep HM Responsible for contents of this publication Technical Verantwortlich f r den Inhalt dieser Publikation Documentation Responsable du contenu de cet imprin ESAB Laxaa S BA TEKNIK 1987 02 2 TECHNICAL DESCRIPTION PAD 3 is the denomination of a pulse2. 98 Ar 2 0 98 Ar 2 0 80 Ar 20 C02 80 Ar 20 C02 Fig 1 OPERATION 1 Connect the PAD 3 to the remote control socket on LUA 400 2 Select program according to fig 1 3 If no one of the six preset programs is suitable set the parameters manu ally position 7 4 Select welding current and arc length in the same way as for conventional welding with semi automatics PAD 3 367 502 880 Connection cable 5m 367 144 884 Gaeren cable 10 m 367 144 885 Connection cable 15 m 367 144 886 ADVANTAGES OF SHORT PULSING FOR DIFFERENT MATERIALS Aluminium The method makes it possible to weld thin gauge material with spray arc using large size wire Thick wire makes the wire feed easier Good breaking up of oxide Working area 2 5 mm _ Stainless steel Requires lower heat input than with spray arc and consequently it causes less deformation However the heat input is higher than for short arc Allows welding in thin stainless steel sheet without spatter what also applies to short arc welding Non alloyed steel Allows welding of both the root run and the filler run with the same wire often large size cored wire Easier to weld without spatter in the mixed arc range No great advantages compared to short arc welding
3. d arc device It is intended to be connected to the LUA 400 inverter power source By control via the PAD 3 the power source delivers a continuous direct current base current that can be adjusted and a superposed pulsed current of adjustable amplitude and duration The base current is sufficient to maintain the arc but not to transfer any ma terial from the filler wire to the workpiece It also preheats the wire and the workpiece The melting of the wire is caused by the superposed pulsed current at the rate of one drop per pulse The droplet transfer from the wire over to the workpiece occurs without causing a short circuit why the transfer of material is smoother and more uniform than with ordinary short pulse welding The effect is an artificial spray arc which works in the normal short arc range and mixed arc range By adjusting the pulse frequency and the voltage the wire feed speed and the heat input rate can be controlled The lower the pulse frequency the less the heat input The following five parameters are controlled by the PAD 3 Welding current wire feed speed Arc length frequency Pulse time Pulse amplitude Base current Besides there are six preprogrammed combinations of parameters in the PAD 3 which can be selected by means of a 7 position switch Position 7 is for manual setting The six standard programs are Program Wire es Recommended no material shielding gas Ar Ar
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