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SECTION 4 OPERATION

4.5 SPOOL-ON-GUN CONNECTION/OPERATION

The Migmaster 250 Plus is equipped with a built-in control for the ST-23A or MT-

250SG Spool Gun which operates via the amphenol control receptacle and the

front panel output receptacles.

To operate the unit an ST-23A or MT-250-SG, do the following:

A. Place the STD./Spool Gun selector toggle switch in the 250 Plus to its

Spool Gun position.

B. Connect the MT-250SG / ST-23A control cable amphenol to the receptacle

labeled CONTROL on the 250 Plus’s front panel.

C. If using an MT-250SG, connect the power cable directly to the (+) positive

Low Inductance output terminal.

If using a ST-23A, connect the gas/power cable to the power cable

adaptor (P/N 37301). Plug the adapter into the (+) positive Low Inductance

output terminal (see Section 3.5).

D. If using an MT-250SG, connect the gas hose directly to the R-33-FM

flowmeter regulator. Set the flow to 30 cfh.

If using an ST-23A, connect the gas hose from the power cable adapter

directly to the R-33-FM flowmeter regulator. Set the flow to 30 cfh.

E. Connect the 250 Plus’s WORK cable to the workpiece.

F. Set Migmaster 250 Plus voltage tap switches to RANGE and FINE

ADJUSTMENT VOLTAGE desired settings.

G.Turn on the Migmaster 250 Plus’s power switch and begin welding.

If the optional Spot/Stitch/Anti-Stick control module is installed, the MT-250SG

and the ST-23A gun may be operated using these optional features, see Section

4.6.

Figure 4.3 - Connecting Spool-On-Gun

ST-23A Requires

Power Cable Adapter 37301

To Connect to Front Panel

Twist Lock Receptacle

MT-250SG

Connects Directly to the

Migmaster 250Plus

Front Panel Power and Control

Receptacle

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ESAB MIGMASTER 250 Bedienerhandbuch Seite 35