C-Frame GTAW Welding System

The EMI C-Frame Welding System is a full function (torch travel, AVC, oscillation and wire) weld system designed for multi-pass GTAW welding. This lightweight, yet robust weld head series is designed for welding of diameters of .75” to 3.5”. Each weld head configuration has a .5” range. Custom sizes are available upon request.

Mounting of the weld head is accomplished with a simplified clamping system that is configurable to most OD’s with in .5” of nominal size of C-frame.

All axes of the weld head are driven by intelligent motors for smooth and consistent performance over the life of the motors. Additionally, utilization of these motors eliminates the calibration issues associated with DC servomotor systems.


  • Utilizes the Model TC-3, multi-pass welding control
  • All weld levels and parameters programmable from the remote pendant and adjustable during weld operations
  • Low radial clearance (~1”)
  • Quick clamping to work
  • Dual speed jog on travel and wire feed axes
  • Control box with wire feed unit and 2 pound spool holder (std. configuration)
  • Single connection for water/power/gas
  • Special sizes and configurations available on request

Standard Configuration Details:

AHC TRAVEL 6 inches
INDEX WIDTH 0 – 6 inches
OSCILLATOR PIVOT 0 – 360 degrees
WIRE SIZE 0.045” Standard
WELD VOLTAGE 10 to 38 volts, 1-volt increments
WELD CURRENT 0 to 300 amps, 5 amp increments
WIRE SPEED 50 to 600 inches per minute, 5 ipm increments
TRAVEL SPEED 0 to 100 inches per minute, 1 ipm increments
OSCILLATOR WIDTH 0 to 100, 1 increment
OSCILLATOR SPEED 0 to 100, 1 increment
OSCILLATOR IN DWELL TIME 1. MAX – 20 tenths of a second (2.0 sec)
2. MIN – 0 tenths of a second
3. INC – 1 tenth of a second (0.1 sec)
OSCILLATOR OUT DWELL TIME 1. MAX – 20 tenths of a second (2.0 sec)
2. MIN – 0 tenths of a second
3. INC – 1 tenth of a second (0.1 sec)
PRE-PURGE TIME 3 seconds
BURN BACK TIME 0 to 200 ms, 1 ms increments

Weld Head Performance

Wire Size 5 pounds
AVC travel .75”
Oscillator travel 0.5 inches
Jog travel speed Size dependent
Wire speed 1 to 100 IPM
Oscillation speed 30 IPM
Oscillation dwell 0 to 3 seconds


  • 150 Amp, water cooled
  • Trailing gas coverage
  • Integral wire nozzle adjustment that pivots with the torch head
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