PREPARING THE ELECTRODE
Special care is to be paid while preparing the electrode tip. Grind the tip so that it shows vertical lines (markings) as shown in Figure
below.
WARNING:
flying hot metal particles can cause serious injury to personnel, cause fire and damage equipment.
WARNING:
tungsten contamination may adversely affect the weld quality. Contact of the tungsten electrode with the welding bath
is to be avoided.
Shape tungsten electrode only with a grinder equipped with adequate protective guards in a safe location and wearing adequate
protections for face, hands and body. Shape tungsten electrodes with a fine grit, hard abrasive wheel used only for tungsten shaping.
Grind the tip of the tungsten electrode to a taper for a length of 1,5 – 2 times the electrode diameter.
Model Max
Power
No-Load
Voltage
Welding
Current
Duty Cicle
Electrodes
Diam.mm
Weight
Kg.
Dimensions
mm
Number of
Fans
MMA 1255
3KVA
80V
10-90
90A – 40%
75A – 60%
1,5-2,5 3
265X105X178 1
EXPLANATION OF TECHNICAL SYMBOLS
The arc welder is manufactured in conformity with these international standards: IEC 60974 -1 / IEC 60974 – 10.
Single-phase, static frequency converter-transformer-rectifier.
Droping characteristic.
MMA
: Suitable for welding with coated electrodes:
TIG:
Suitable for TIG welding
U0
: Secondary no-load voltage.
I2
: Welding current.
U2
: Secondary voltage with load.
U1
: Rated supply voltage.
I1
: Power consumption with load.
IP 21C
: Degree of protection of casing.
9