High Force Servo-Motor Driven Weld Head - Model 73


  • Programmable speed and positions
  • Controlled servo motor actuation eliminates overforce
  • Force range 15 lb. to 110 lbs.
  • Durable and robust head design
  • Displacement and force options
  • Comprehensive I/O


Designed for use in either automation or benchtop welding, Miyachi Unitek’s 73 Series Weld Head offers fast, repeatable electrode motion control for a wide range of resistance welding applications.
The weld head features an easy-to-program servo motor controller that allows precise programming of electrode position and speed for up to 32 different weld schedules.
The head can also be configured in either an inline or parallel gap configuration, or specifically for automation applications.



Specification :

Model Number

73 Head

Force Range Lbs.


Weld Force Method

Spring force setting

Actuation Method

Servo motor

Electrode Stroke Inches


Throat Depth Inches (mm)

3.9 (100)

Number of Schedules


Electrode Speed

Start point to Mid point - 8 selectable speeds by schedule (20-125mm/s)
Mid point to Weld point - 4 selectable speeds by schedule (5 - 30mm/s)

Squeeze Time Setting

10 settings(0,10,20,30,40,50,60,70,80,90,100ms)

Hold Time Setting

8 settings (100,200,300,400,500,1000,2000ms,external END signal)

Power Supply

100-240VAC ±10%, 50/60Hz

Welding Current


Weight Lbs.

Head: 35.2, Controller: 6.6



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