Lincoln Electric 170I manual Changing Machine Over to Feed Other Wire Sizes, Welding with Gmaw MIG

B-6 OPERATION B-6

The Handymig 170i is suitable for .035"(0.9mm) alu- minum wire and .023"–.035"(0.6-0.9mm) stainless wire. Refer to Table B.1 for recommended procedure settings. (Requires K664-2 Aluminum - Stainless Feeding Kit.)

CAUTION

It is important when changing between welding with steel wire and aluminum to exchange feeding components due to the lubricant applied to steel wire. Failure to do so may result in contaminated welds when welding aluminum.

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TABLE B.1 — Handymig 170i

		Shielding		Voltage/Wire Speed
Process	Welding Wire	Gas	16 ga	14 ga	12 ga	10 ga	3/16
MIG DC+	.035 Dia	100% Argon	A-5	B6.5	C-8	D-8.5	E-10
	4043/5356
	Aluminum Wire
MIG DC+	.023 Dia	98% Argon/	A-4	B-6	C-8	—	—
	308L Stainless	2% Oxygen
	Steel Wire
MIG DC+	.030 Dia	98% Argon/	B-3.5	C-6.5	D-7	E-8	E-9
	308L Stainless	2% Oxygen
	Steel Wire
MIG DC+	.035 Dia	98% Argon/	B-2.5	C-4	D-6	E-8	E-8
	308L Stainless	2% Oxygen
	Steel Wire

CHANGING MACHINE OVER TO FEED OTHER WIRE SIZES

The Handymig 170i is shipped from the factory ready to feed 0.023” – .025" (0.6 mm) diameter wire. To operate the Handymig 170i with other sizes of wire, it is necessary to change the contact tip and change the drive roll over to other sizes. Refer to Changing the Contact Tip and Changing the Drive Roll, in the MAIN- TENANCE section, for specific information on these procedures.

WELDING WITH GMAW (MIG)

Shielding Gas

When using the GMAW process, install a gas regula- tor and hose kit.

•For CO2, open the cylinder very slowly. For argon- mixed gas, open cylinder valve slowly a fraction of a turn. When the cylinder pressure gauge pointer stops moving, open the valve fully.

•If using a regulator with an adjustable flow meter, close the gun trigger and adjust the flow to give 15

–20 cubic ft per hour (CFH) (7 – 10 I/min) [use 20

–25 CFH (10 – 12 I/min) when welding out of posi- tion or in a drafty location.

•Keep the cylinder valve closed, except when using the Handymig 170i. When finished welding:

•Close the cylinder valve to stop gas flow.

•Depress the gun trigger briefly to release the pressure in the gas hose.

•Turn off the Handymig 170i.

WELDING WITH FCAW (Innershield)

When using the FCAW process, the correct drive roll and electrode polarity must be used. See Work Cable Installation in INSTALLATION section for changing the polarity.

Use optional Innershield welding kit K549-1 (for 0.9 mm) or K549-2 (for 1.2 mm), as appropriate.

•K549-1 0.9mm (.035”) Innershield® Welding Kit— Includes a contact tip, a gasless nozzle and a 0.9- 1.2mm cable liner to permit the Magnum™ 100L gun and cable to use 0.9mm diameter flux-cored elec- trode. The fitting on the end of the liner is stencilled with the maximum rated wiresize (.045”/1.2mm). Also included is a spool of 0.9mm Innershield® NR-211-MP.

•K549-2 1.2mm (.045”) Innershield® Welding Kit— Includes a contact tip, a gasless nozzle and a 0.9- 1.2mm cable liner to permit Magnum™ 100L gun and cable to use 1.2mm diameter flux-cored elec- trode. The fitting on the endof the liner is stencilled with the maximum rated wire size (.045”/1.2mm). Also included is a spool of 1.2mm Innershield® NR- 211-MP and a knurled drive roll.

Several changes are needed to convert the unit for operation with the Innershield (FCAW) process. The K549-1 or K549-2 Innershield Kits include all the nec- essary accessories for this conversion and are provid- ed for this purpose. The following conversions should be made using the contents of this kit:

•Change the output polarity to DC(-). See “Work Cable Installation” in Installation Section for details.

•Install proper drive roll for wire size selected. See “Changing Drive Roll” in Maintenance Section for details.

•Install the proper gun liner and tip for the wire size selected. See “Component Replacement” in the Maintenance Section for details.

•Remove gas nozzle (if installed) and install gasless- nozzle. To remove, simply unscrew.

•Load wire into machine and thread into gun and cable per “Welding Wire Loading” section.

Handymig 170i