Arc Machines 307 - Manual (Page 141)

Arc Machines, Inc. Model 307 Orbital Tube Welder Training
Document No. 740096 Chapter 13. Page 8
Rev. A
Tube Installation to the weld head
Arc Machines Model 8 and Model 9 weld heads have a window that opens for
viewing the electrode line-up to the weld joint. Install tube on one side of the
head and before locking the housing clamps completely, position the second
weld component, confirm alignment, lock clamps and close window.
The electrode should be centered on the weld joint with no discernable gap
between the weld components. For longer weld components use a pipe stand
or other support. Do not use the weld head as an alignment tool.