Arc Machines 307 - Manual (Page 152)

Arc Machines, Inc. Model 307 Orbital Tube Welder Training
Document No. 740096 Chapter 15. Page 5.
Rev. A
Model 307 Electrode Calculator
Electrode Length and Tip Diameter. To find the correct electrode
length for a particular weld schedule, touch the Tools Icon from the
schedule or the Tools button from the 307 Opening Screen. Then select
Electrode from the Tools menu.
On the Tools - Electrode Calculator Screen, select the weld head (or enter
rotor O.D.). Enter tube diameter, wall thickness, and Arc Gap (or select AMI
recommended Arc Gap). Electrode Length and tip diameter are displayed.