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Kemppi A7 TIG Orbital System 300 Manual

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A7 TIG Orbital System 300© Kemppi Oy 2016 1615
OPERATING MANUAL
5.2 Root-pass refinement for horizontal pipe (5G position)
The following information is meant as a general guideline for an inexperienced operator.
These guidelines allow you to become familiar with the equipment and do limited weld
development while developing your own technique. It is important to remember to record
any and all changes made to the weld procedure.
Problem Possible solution
Excessive
reinforcement from 2
o’clock to 11 o’clock
• Increase wire speed 50 mm/min (2 inches/min) maximum
increments at a time.
• Increase travel speed 3 mm/min (0.125 inches/min)
maximum increment at a time.
• Decrease high pulse current if pulse technique is used
alternately.
• Decrease low pulse current (% of high pulse current) or
increase low pulse time to 0.2 seconds maximum.
OD of root-pass bead
excessively convex
• Decrease wire speed 50 mm/min (2 inches/min) maximum
increments at a time.
• Decrease travel speed 3 mm/min (0.125 inches/min)
increment at a time.
• Increase current. If using pulse mode, increase low pulse
current (% of weld current) or decrease low pulse time 0.2
seconds max per change.
ID penetration is
insucient
• Decrease wire speed 50 mm/min (2 inches/min) maximum
increments at a time.
• Decrease travel speed 3 mm/min (0.125 inches/min)
increment at a time.
• Increase current.
• Change prep geometry: As a last increase land extension
length for J-Prep. Increase bevel geometry included angle
for standard V-bevel (Increase 37.5º sidewall angle to 45º).
• Change tungsten electrode geometry: Use a greater
included angle tip geometry.
ID bead concave 360º
around pipe
• Decrease current.
• Increase wire speed.
• Increase travel speed.
• Change prep geometry.
• Change tungsten geometry.
ID bead uniform
except concavity at 5
o’clock to 7 o’clock
• Decrease arc length.
• Increase wire speed.
• Increase travel speed.
Consumable insert
not completely
consumed
• Increase current or high pulse current if using pulsing.
• Decrease travel speed.
• Increase low pulse current (increase % of high pulse
current).
• Increase high pulse time.
• Decrease low pulse time.
Consumable insert ID
bead not uniform
• Decrease current.
• Increase travel speed.
• Change tungsten geometry.
• Change insert t-up if possible.
… 47 …


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