Full Product Manual

FRONT PANEL LIGHTNING MTS 275

Section 2 Setup Guide

FRONT PANEL FEATURES

1. AC Connector. The DINSE 35 Style connector is an industry standard sized connector. This terminal has one use only. It is

designed to be used only in AC TIG mode. When AC TIG welding mode is selected, the work clamp should be relocated to

this terminal. The TIG torch will remain in the negative. Warning: Never use this connection with the TIG torch or any other

torch or mode of operation except AC TIG or damage may occur.

2. Control Connector. This connector serves different functions in different modes. In TIG mode this connector is used to

provide arc initiation in TIG mode. When the TIG torch switch is connected, it conveys the 2T/4T signal to operate the se-

quencer ( controls preflow, start amps, upslope, welding amps, downslope and end amps) When the foot pedal is connected

for TIG mode, it serves not only to start the arc, but to regulate the amps. The foot pedal sends a signal to the welder to start

the arc and a signal that tells the welder what relative position the foot pedal is in to increase or decrease the amperage. In

spool gun mode it serves to regulate the wire speed and initiate the arc. The control knob on side of the gun is used to

change welding wire delivery speed, thereby regulating the amps. The Gun trigger signals the welder to start feeding the

wire, and to initiate the arc.

3. Control Connector. This connector is used to connect to the foot pedal in TIG mode, and the Spool Gun in MIG mode. This

connector should be disconnected in MIG and Stick mode for safe operation.

4. Positive Connector. The DINSE 35 Style connector is an industry standard sized connector. The polarity of the terminal is

always positive. This terminal is used as the torch (electrode holder) connection in stick mode. In DC TIG mode this is the

location of the work clamp. This is used as the work clamp location, only while in DC TIG mode. In AC, mode the work

clamp will be transferred to the AC Connector.

5. Gas Connection. This is the gas connection when welding in TIG mode. The quick coupler is designed to offer quick and

efcient coupling of the TIG torch gas line. If you are using a water-cooled torch, before attempting to connect the gas line,

blow through the gas line to verify that gas does indeed exit through the torch head. Otherwise, improper gas connection

may occur.

6. Euro MIG Connector. The MIG gun and Spool gun connect directly to this tting. The connection offers quick and secure

tting of the MIG gun or spool gun directly to the unit. To secure the Gun to the tting, align the small pins and large gas

conductor tting and slide together until it completely seats home. Then, gently screw the outer plastic hand nut on the

torch connector clockwise until the tting is secured. Do not overtighten or use any tool or pliers to further tighten the nut

or damage may occur. Hand tight is sufcient.

7. Clear Plastic Protective Cover. When the machine is in use, keep this protective cover down to prevent spark damage or UV

damage to the panel from intense arc rays. When not in use the panel should remain down as well. The only time the panel

should be raised is during