mig basics

pulse (mix of short circuit and spray)

(welder current peaks, melts, and drops a drop and maintains arc) 22-26 V

spray

26-35 V

globular (gravity)

(fcaw) 22-26 V

short circut

12-22 V

short circut

all position, thin metals and root passes

pulse

all position, thin weird metals

globular

flat, horizontal, thick

sprayp

s flat, horizontal, thick

spray

85% ar

globular

100% co2, 75%ar 25%co2

pulsed

90% ar 10% co2

short circut

75% a 25% co2

spray

reduce voltage until slight crackle sound (determines proper arc length), hide contact tip from heat

short circut

short stickout by extending contact tip 3-4mm beyond gas nozzle

globular

long stickout by recessing contact tip 2-3mm into gas nozzle

pulse

frequency-arc length+penetration

width-increases puddle width

peak (amps)current-increases arc length

background amps-set slightly above arc stability affected, is still low and allows puddle to cool