Series 20 Weld Head User’s Manual 3
Weld Head
The Series 20 SWS weld head delivers consistent, precise welds for
outside tubing diameters from 1/2 to 2 in. and 12 to 52 mm and pipe
diameters ranging from 1/4 to 1 1/4 in. and 10.2 to 48.3 mm.
A DC motor in the weld head drives a rotor, which carries the tungsten
electrode around the weld joint. Optical circuitry in the weld head
sends precise feedback to the power supply to control the speed of
the rotor.
All moving parts in the weld head are mounted in low-friction devices
to provide smooth, consistent operation.
A spring-loaded, oating brush continuously contacts approximately
one-third of the circumference of the rotor. This conguration ensures
consistent, uniform electrical conductance to the rotor and electrode.
Fixture Block
The Series 20 SWS xture block accurately aligns and holds tubing,
ttings, and valve bodies. The modular design allows you to select
different side plates and create the conguration needed for the job.
The xture block is separate from the weld head, allowing work pieces
to be easily aligned and xtured before welding. Using multiple xture
blocks can increase productivity.
Each xture block is designed to accommodate a range of work
piece sizes. A Universal Collet Insert (UCI) ts into the xture block to
match the diameter of the work piece. The collet design rmly holds
tubing and ttings that vary ±0.005in. (0,13mm) from nominal outside
diameter. Collets are also available for thin wall pipe. The collets
exchange quickly, making the xture block very adaptable to changing
work requirements.
Figure 1 Series 20 Weld Head
Figure 2 Series 20 Fixture Block
13-205R4.indb 3 2/1/13 2:43 PM
