GMAW chapter 3
welding power supplies are made to operate on _ or _ phase primary current
Alternating current or three
the time period is based on a _ minute period.
10 minute period
The power supply produces welding current at _ voltages
110,208,230,or 460 volts & generally 60 hertz(cycles)
the time at rated load at which the machine will operate w/o harm to the machine is called the machine_ _.
Duty cycle
the gun cable is connected to the wire feeder by the use of an _.this equipment is usually made by the gun manufacture and fits the manufacture's equipment.
adapter
guns are rated by _ _, in the same way as a power supplies are rated.
duty cycle
the electrical current produced by the power supply is transferred to the electrode through the _ _
contact tip
when setting up a machine for spray-arc welding and slope adjustment is available the slope is set in the _ mode
flat
arc outages in the short arc mode are generally caused by a faulty _ connection
ground
the word _ is used to express the number of cycles of input electrical current
hertz
a welding machine manufacturer's guarantee on equipment is called the machine _.
warranty
another name for the inductance is _ _ it relates to the rate of rise of welding current when the electrode is in contact with the work piece in the short arc mode
pinch effect
the three types of wire feeders include the _ type the _ type and the _-_ type
push, pull,push-pull
adjustment of the inductance control aids in obtaining _ reducing _ and obtaining a _ welding crown
more fluid weld pool, spatter, smoother
when setting up a machine for short -arc welding and slope adjuctment is available the slope is set in the _ mode
steep
the _ of the volt ampere curve is actually the operating characteristics of the welding machine output
slope/slant
the letters OCV with regard to welding power supplies define the _ _ _ established on the machine
open circuit voltage (OCV)
wire feeders generally use 110 volts input current while gun motors will have a _ voltage for the safety of the welder
24 V
the actual arc voltage established on the machine after welding begins may also be referred to as _ voltage
Arc or Load voltage
welding guns which use the push pull system use wheels with _ _ that pull the wire from the wire feeder slave unit.
Spool guns . . . drive rollers
wire feeders have either a _ -or _ roll drive system. the _ roll system is used where precision drive of the filler wire is required
Two, Four, four
all welding power supplies have a _ output current which is established by the design of the machine to _ spec.
limited, manufacture
a _ is used in the gun cable to protect ti from _ of wire it is installed in the cable with specific instructions for assembly into the gun adapter
liners, type and size
When welding with the short- arc mode the machine OCV is generally set in the _ end of the range, while the spray-arc mode requires setting on the _ voltage range.
low, middle
proper _ of welding equipment will extend the life of the equipment for a long period of time and reduce the number of major repairs
maintenance