Hobart Welding Products 125 Typical Control Settings, Wire Size Amperage Range, Select Voltage

9-3. Typical Control Settings

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

Material thickness determines weld
parameters.
1/8 or 0.125 in.	Convert Material
	Thickness to
	Amperage (A)
	(0.001 in. = 1 ampere)
	0.125 in. = 125 A

.035 in

Wire Size	Amperage Range
0.023 in.		30 − 90 A
0.030 in.	40 − 145 A
0.035 in.	50 − 180 A

Select Wire Size

Wire	Recommendation		Wire Speed		Select Wire Speed
Size			(Approx.)		(Amperage)
0.023 in.	3.5 in per ampere	3.5 x 125 A = 437 ipm			125 A based on 1/8 in.
0.030 in.	2 in per ampere	2 x 125 A = 250 ipm			material thickness
0.035 in.	1.6 in per ampere	1.6 x 125 A = 200 ipm
					ipm = inches per minute
	Low voltage: wire stubs into work				Select Voltage
	High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage
Voltage	controls height and			Wire speed (amperage) controls weld
width of weld bead.				penetration (wire speed = burn-off rate).

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