Welder Specifications; Description; Welder Operating Characteristics; Duty Cycle - Craftsman 934.205111 Operator's Manual

DESCRIPTION
Your new 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 26
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 (inputs) Amps 20
Phase Single
Frequency 60 Hz
Secondary (output) volts 18_5
Secondary (UL output) amps 90
Open Circuit Volts (Max.) 28 Vdc
Duty Cycle Rating 20%
MIG welders equipped with gas are
capable of welding with 0_024 (0.6mm)
and 0.030 (0.Smm) solid steel wire on dc
reverse polarity and with 0_030 (0.Smm)
self-shielding flux-core wire on dc
straight polarity. Larger, 0.035 inch
(0.gmm) 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. The
manufacturer does not recommend the
use of larger diameter wire.
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 20% at the rated output. This means
that you can weld for two (2) minutes out
of 10 with the remaining eight (8) 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
40% 4 minutes 6 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 this welder can
result. If you exceed the duty cycle of
your 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 10 minutes
after the thermal protector opens
before resuming welding. You must
do this even if the thermal protector
resets itself before the t0 minutes is
up or you may experience tess than
specified duty cycle performance.
If you find that your welder will not weld
for 2 minutes without stopping, reduce
the wire speed slightly and tune the
welder in 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°