. A complete Parts List is available at www.MillerWelds.com

6-4. Typical MIG Welding Connections And Settings

A. Solid Wire Applications

! Stop engine.

Typical Control Settings For .035 (ER70S-3)

Solid Wire − Short Circuit Transfer

Note Coarse Range,

Fine Control, and

Weld Process switch

settings.

6

7

Quick connector

2

3

5 4

Work

1

Tools Needed: 3/4 in

803 750-B / 802 766 / 228 201-B

.This section provides general guide-

lines and may not suit all ap- plications.

.The control panel shows the typical

settings for welding with .035 (ER70S-3) solid wire. Use Argon- based shielding gas.

1Work Clamp

2Wire Feeder

3MIG Gun

4Gun Trigger Plug

5Voltage Sensing Clamp

6Gas Cylinder:

75/25 Argon-Based Gas for Short Circuit Transfer

80% Argon (Or Higher) For Spray Transfer

7Gas Hose

Connect work cable to welding generator Work terminal. Connect cable from wire feeder to cable from welding generator Electrode terminal.

.Be sure to use the correct size weld cables (see Section 5-7).

Loosen MIG gun securing knob. Insert gun end through opening in feeder and position as close as possible to drive rolls without touching. Tighten knob.

See wire feeder manual for wire thread- ing procedure.

Insert gun trigger plug (item 4) into matching receptacle and tighten threaded collar.

Connect gas hose from feeder to regula- tor on cylinder.

Typical Control Settings For Short

Circuit Transfer Using .035 (ER70S-3)

Solid Wire And 75/25 Argon-Based

Gas:

>Set Weld Process Selector switch to Wire + (DCEP) position.

>Set Coarse Range switch to Wire/ Low Range (17-22 volts) position.

>Set Fine Control to obtain minimum spatter.

>Set wire feed speed between 150-300 ipm.

Typical Control Settings For Spray

Transfer Using .035 (ER70S-3) Solid

Wire And 80% Or Higher Argon-

Based Gas:

>Set Weld Process Selector switch to Wire + position.

>Set Coarse Range switch to Wire/ High Range (20-28 volts) position.

>Set wire feed speed between 320-500 ipm.

>Set Fine control to 3 and increase for longer arc length.

OM-4419 Page 26

Page 30
Image 30
Miller Electric Bobcat 250 manual Typical MIG Welding Connections And Settings, Solid Wire Applications