Welder Operating Characteristics; Duty Cycle; Internal Thermal Protection - Craftsman 196.205690 Manual Del Usuario

DESCRIPTION
Your new MIG (Metal Inert Gas) wire feed
welder is designed for maintenance and
sheet metal fabrication. The welder consists
of a single-phase power transformer,
stabilizer, rectifier, and a unique built-in
control/feeder.
Now you can weld sheet metal from 24
gauge up to 3/16 inch thick with a single
pass. You can weld thicker steel with
beveling and multiple pass techniques. Table
1 lists your MIG welder specifications.
Table 1. Welder Specifications
Primary (input) volts 120 Vac
Primary (input) Amps 13
Phase Single
Frequency 60Hz
Secondary (output) volts 21
Secondary (UL output) amps 85
Open Circuit Volts (Max.) 30 Vdc
Duty Cycle Rating 40%
MIG welders equipped with gas are capable
of welding with 0.024.(_0:6mm) and 0.030
(0.8mm) solid steel wire on dc reverse
polarity and with 0.030 (0.8mm)
self-shielding flux-core wire on dc straight
polarity. Larger, 0.035 inch (0.9mm) diameter
solid steel wire, on dc reverse polarity may
also be used on this welder. The use of
larger diameter wire makes welding difficult
and the results cannot be guaranteed. Use of
larger than .035 diameter wire is not
recommended.
WELDER OPERATING
CHARACTERISTICS
DUTY CYCLE
The duty cycle rating of a welder defines
how long the operator can weld and how
long the welder must be rested and cooled.
Duty cycle is expressed as a percentage of
10 minutes and represents the maximum
welding time allowed. The balance of the
10-minute cycle is required for cooling.
Your new welder has a duty cycle rating of
40% at the rated output. This means that you
can weld for four (4) minutes out of 10 with
the remaining six (6) minutes required for
cooling. (See Table 2).
Table 2. Duty Cycle Ratings
Duty Maximum Required
Cycle Welding Resting
Rating Time Time
20% 2 minutes 8 minutes
60% 6 minutes 4 minutes
80% 8 minutes 2 minutes
100% 10 minutes 0 minutes
INTERNAL THERMAL
PROTECTION
CAUTION
Do not constantly exceed the duty cycle or
damage to the welder can result. If you
exceed the duty cycle of the welder, an
internal thermal protector will open, shutting
off all welder functions except the cooling
fan. If this happens, DO NOT SHUT OFF
THE WELDER. Leave the welder turned on
with the fan running. After cooling, the
thermal protector will automatically reset and
the welder will function normally again.
However you should wait at least ten
minutes after the thermal protector opens
before resuming welding. You must do this
even if the thermal protector resets itself
before the ten minutes is up or you may
experience less than specified duty cycle
performance.
If you find that the welder will not weld for
two minutes without stopping, reduce the
wire speed slightly and tune in the welder at
the lowest wire speed setting that still
produces a smooth arc. Welding with the
wire speed set too high causes excessive
current draw and shortens the duty cycle.
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