Lincoln Electric IM794 manual GAS Connection, GUN Installation, Work Cable Installation

A-4 INSTALLATION A-4

Work Cable Installation

Refer to Figure A.2.

1.Open the wire feed section door on the right side of the SP-170T.

2.Pass the end of the work cable that has the termi- nal lug with the smaller hole through the Work Cable Access Hole (1) in the case front.

3.Route the cable under and around the back of the Wire Feed Gearbox (6).

4.For GMAW Only: Refer to Figure A.2. As deliv- ered, the machine is connected for positive elec- trode polarity. This is the appropriate configuration for the GMAW (MIG) process. To complete installa- tion, use the provided wing nut to connect the work cable’s terminal lug to the negative (–) output ter- minal (5) located above the Wire Feed Gearbox

(6). Make sure that both wing nuts are tight.

5.For Innershield Only: Refer to Figure A.4. To wire for negative polarity (required for the Innershield process), connect the short cable attached to the connector block (1) to the negative (–) output termi- nal (2) and the work cable (3) to the positive (+) ter- minal (4).

FIGURE A.4

4

3

2

1

NOTE: If .035" or .045" (0.9 mm or 1.2 mm) Innershield flux-cored wire is to be used, the appropri- ate Innershield kit is required. (see ACCESSORIES section)

Connecting Gun Cable to the SP-170T

1.Refer to Figure A.2. Unplug the machine or turn power switch to the OFF “O” position.

2.Pass the insulated terminals of the gun trigger con- trol leads, one at a time, through the Gun Cable and Control Lead Access Slot (2) in the case front. The leads are to be routed up the inside of the case front, behind the gas line.

3.Insert the connector on the gun conductor cable through the Gun Cable Access Hole (2) in the SP-170T case front. Make sure the connector is all the way in the brass connector block to obtain proper gas flow. If the gun connector will not fully insert, unscrew the thumbscrew on the connector block a few turns. Rotate the connector so control leads are on the underside and tighten the Thumbscrew on the connector block.

4.Connect the gun trigger control lead terminals to the two insulated 1/4" (6,4 mm) tab terminal con- nector bushings located above the “Gun Trigger Connection” decal in the wire feed section (4). Either lead can go to either connector.

CAUTION

If the gun trigger switch being used is other than that supplied, the switch must be a normally open, momentary switch. The terminals of the switch must be insulated from the welding circuit. Malfunction of the SP-170T may result if this switch shorts to the SP-170T welding output cir- cuit or is common to any electrical circuit other than the SP-170T trigger circuit.

	GAS CONNECTION
GUN INSTALLATION	When using the GMAW process, a cylinder of shield-
As shipped from the factory, the SP-170T gun is ready	ing gas, must be obtained. For more information about
	selecting gas cylinders for use with the SP-170T, refer
to feed .023" – .025" solid wire. If .030"- .035” (0.8	to the ACCESSORIES section.
mm-.9mm) solid wire is to be used, change the con-
tact tip to the appropriate size. If .035” Flux-cored wire
is to be used, change the contact tip and nozzle to the
appropriate type and orient the drive roll to the approri-

ate groove size.

SP-170T