Impax IM-MIG120 Instruction Manual page 38

MMA OPERATION
Drying of Electrodes
Drying is usually carried out following the
manufacturer's recommendations and
requirements will be determined by the type of
electrode.
IMPORTANT – Thermostatic Protection
(Duty Cycle)
This product has a rated duty cycle of 20%. The
percentage represents the welding time in a 10
minute period for example 20% means that the
welding time is 2 minutes with a rest time of 8
minutes in a ten minute period although the
actual duty cycle will depend on the amperage
used. If the Welding Power Supply is used for
longer than the duty cycle or if you are welding
using large welding rods you may experience a
temporary current shut off. This is to protect the
transformer inside the Welding Power Supply
from overheating.
The thicker the material being welded, the
greater the current required, therefore, the hotter
the machine will become and the quicker it will
cut out. When the windings reach performance
temperature the cut out switch will operate
illuminating the overheat indicator on the front
panel. After a few minutes the cut out switch will
reset and the welder will be ready for use.
37