Contents
Notes on the use of these operating instructions
099-005084-EW501
22.09.2011 3
1Contents
1Contents..................................................................................................................................................3
2Safety instructions.................................................................................................................................5
2.1 Notes on the use of these operating instructions ..........................................................................5
2.2 Explanation of icons.......................................................................................................................6
2.3 General..........................................................................................................................................7
2.4 Transport and installation ............................................................................................................11
2.5 Ambient conditions.......................................................................................................................12
2.5.1 In operation...................................................................................................................12
2.5.2 Transport and storage..................................................................................................12
3Intended use.........................................................................................................................................13
3.1 Applications..................................................................................................................................13
3.1.1 MIG/MAG standard welding.........................................................................................13
3.2 Overview of device types.............................................................................................................13
3.2.1 Multi-voltage machine (MV)..........................................................................................13
3.3 Documents which also apply .......................................................................................................14
3.3.1 Warranty.......................................................................................................................14
3.3.2 Declaration of Conformity.............................................................................................14
3.3.3 Welding in environments with increased electrical hazards.........................................14
3.3.4 Service documents (spare parts and circuit diagrams)................................................14
4Machine description – quick overview ..............................................................................................15
4.1 Front view ....................................................................................................................................15
4.2 Rear view.....................................................................................................................................16
4.2.1 Inside view....................................................................................................................17
4.3 Machine control – Operating elements........................................................................................18
4.3.1 Mira 151........................................................................................................................18
4.3.2 Mira 221 MV.................................................................................................................19
4.3.3 Mira 251........................................................................................................................20
4.3.4 Mira 301........................................................................................................................21
5Design and function.............................................................................................................................22
5.1 General........................................................................................................................................22
5.2 Installation....................................................................................................................................23
5.3 Machine cooling...........................................................................................................................23
5.4 Workpiece lead, general..............................................................................................................23
5.5 Mains connection.........................................................................................................................24
5.6 Mira 151.......................................................................................................................................24
5.6.1 Mira 221 MV.................................................................................................................25
5.6.1.1 Connection with 230 V mains voltage...........................................................25
5.6.1.2 Connection with 400 V mains voltage...........................................................26
5.6.2 Mira 251, 301................................................................................................................27
5.7 Welding torch and workpiece line connection .............................................................................28
5.8 Shielding gas supply....................................................................................................................30
5.8.1 Connecting the shielding gas supply............................................................................31
5.8.2 Setting the shielding gas quantity.................................................................................32
5.9 Inserting the wire electrode..........................................................................................................33
5.9.1 Inserting the wire spool ................................................................................................33
5.9.2 Changing the wire feed rollers......................................................................................34
5.9.3 Inching the wire electrode ............................................................................................35
5.9.4 Spool brake setting.......................................................................................................37
5.9.5 MIG/MAG operating point.............................................................................................38
5.10 MIG/MAG functional sequences / operating modes....................................................................38
5.10.1 Explanation of signs and functions...............................................................................38
5.10.2 Non-latched operation..................................................................................................39
5.10.3 Latched operation.........................................................................................................39
5.10.4 Spot welding.................................................................................................................40
5.10.5 Interval..........................................................................................................................41
