7
Introduction
Thank you for purchasing one of our products. Please read instructions
on use in this manual as well as the safety rules given in the attached
booklet and follow them carefully to get the best performance from the
plant and be sure that the parts have the longest service life possible. In
the interest of customers, you are recommended to have maintenance
and, where necessary, repairs carried out by the workshops of our serv-
ice organisation, since they have suitable equipment and specially trained
personnel available. All our machinery and systems are subject to con-
tinual development. We must therefore reserve the right to modify their
construction and properties.
ENGLISH
EN
Introduction 7
Description 7
Technical data 7
Usage limits (ISO/IEC 60974-1) 7
How to lift up the system 8
Assembling the welding machine 8
Installation 8
Connection to the electrical supply 8
Gas connection 9
Instructions for use 9
Loading wire 9
Assembly of drive roller 9
Welding 9
Adjustment of electronic circuit board 10
Maintenance 10
Possible problems and remedies 10
Troubleshooting table 11
Welding defects 11
Wiring diagram 64
Key to the electrical diagram 65
Colour key 65
Meaning of graphic symbols on machine 68
Meaning of graphic symboles on rating plate 69
Spare parts list 71-74
Entrainment mechanism 75
Drive mechanism 76
Ordering spare parts 77
Table 1
Model
Three phase 50/60 Hz
Setting range
Installer power
Fuse
Power factor
Open circuit voltage
Usable current at 100%
Usable current at 60%
Usable current at 35%
Usable current at 25%
Wire dimensions
Insulation class
Degree of protection
Dimensions
Weight
V
A
kVA
A
cosϕ
V
A
A
A
A
mm
mm
kg
SMARTMIG T25
230/400
25÷250
6
16 (230V)
10 (400V)
0,97
17-38
120
160
210
250
0,6÷1,2
H
IP 23
830-615-400
54
Description
Semiautomatic welding machine with continuous wire, three-phase sup-
ply, trigger regulation and incorporated suctioning, suitable for use with
gas or CO
2 mixtures and with cored wires without gas; suitable for use in
medium carpentry and body shops, in agriculture and for maintenance.
Well-built and easy to use, with innovative design, SMARTMIG T25 af-
fords excellent weld performance using aluminium and stainless steel
wires.
The main characteristics of the SMARTMIG T25 welding machine are:
• Exceptional welding characteristics with all materials as a result of
inductance levelling;
• Excellent welding performance on thin metal sheets;
• Provided with standard gas cylinder trolley with sturdy wheels to fa-
cilitate movement;
• Supporting structure in metal with front panel in special shockproof
material;
• Sturdy handle integrated with front panel;
• Adequate internal space for conveniently storing metal spools (Max
300 mm - Max 20 kg);
• QBS – Exhaust-brake system permitting repeated continuous arc
strikes;
• Burn Back and automatic external adjustable start system;
• Central Euro connection on torch;
• Rapid coupling for earth cable;
• Professional wire feeder guaranteeing precise and continuous wire
feeding.
Technical data
The technical data for this equipment is summarized in the table 1.
Usage limits (ISO/IEC 60974-1)
The use of a welder is typically discontinuous, in that it is made up of
effective work periods (welding) and rest periods (for the positioning of
parts, the replacement of wire and underflushing operations etc). This
welding machine is dimensioned to supply I
2 max nominal current (250
A), in complete safety, for a work period amounting to (25%) of total
usage time. The regulations in force establish the total usage time to be
10 minutes. If the permitted work cycle time is exceeded, an overheat
cut-off occurs to protect the components around the welder from dan-
gerous overheating. The orange pilot light of the thermostat on the ma-
chine rack panel lights up when the heat protection mechanism starts
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