Miller Electric OM-1313 Typical MIG Process Control Settings, Wire Recommendation Wire Speed

6-2. Typical MIG Process Control Settings

NOTE

These settings are guidelines only. Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure they comply to specifications.

Material thickness determines weld
parameters.	1/8 or	Convert Material
	.125 in
		Thickness to
		Amperage (A)
		(.001 in = 1 ampere)
		.125 in = 125 A

Wire Size	Amperage Range
.035 in
.023 in	30 – 90 A
.030 in	40 – 145 A
.035 in	50 – 180 A

Wire	Recommendation		Wire Speed
Size			(Approx.)
.023 in	3.5 in per ampere	3.5 x 125 A = 437 ipm
.030 in	2 in per ampere	2 x 125 A = 250 ipm
.035 in	1.6 in per ampere	1.6 x 125 A = 200 ipm

Low voltage: wire stubs into work

High voltage: arc is unstable (spatter)

Set voltage midway between high/low voltage.

Select Wire Size

Select Wire Speed (Amperage)

125 A based on 1/8 in material thickness

ipm = inch per minute

Select Voltage

Wire speed (amperage) controls weld pe- netration (wire speed = burn-off rate)

Voltage controls height and width of weld bead.

Ref. ST-801 865

OM-1313 Page 22