686409

Kemppi A7 TIG Orbital System 300 Manual

48
Zoom out
Zoom in
Previous page
1/61
Next page
48
A7 TIG Orbital System 300© Kemppi Oy 2016 1615
OPERATING MANUAL
5.3 Common weld defects: identification and prevention
Problem Possible solution
High frequency but
no weld current
Check for broken electrode or ground cable in the weld head,
handle, or in the cable.
Defects in butt welds
Lack of penetration
with workpiece in
horizontal (5G) or
vertical (2G) positions
• Insucient current
• Rotation speed too high
• Contaminated gas, insucient gas or wrong gas
• Arc gap too great, wrong tungsten tip conguration or
Contaminated/worn tungsten electrode
• Gas ow too high
• Arc not on the joint
• Tube wall dimensional variation
• End of tube not square
• Too much gas on I.D. or no I.D. purge
• Tubes not cleaned
ID location • Increase rotation delay or increase Level 1 amps
• Increase weld current or decrease weld head speed
• Use next weld level 2 to increase amps
• Downslope starting too soon; increase time at last level or use
Start position to initiate downslope.
Concavity (suck-
back) or excessive
penetration
All ID locations
• Weld current too high
• Rotation speed too low
• Tubes not tightly butted together
• Tubes ends not square
• ID purge gas pressure too high; create larger gas exit hole
Over-penetration General
Over penetration is most common through the 12 o’ clock position
in horizontal (5G) welding.
• Increase rotation speed
• Decrease weld current
• Contaminated or improper gas
• Gas ow too high
• Tungsten arc gap may have changed or tungsten conguration
has changed
• Weld head not in calibration
• Tubes not tightly butted
• Tube ends not square
ID location
• Rotation delay period too long, too much weld current or
rotation to low
• Increase speed or decrease current.
• Current too high in weld level or may need to change to another
level with reduction in current.
Porosity or improper
gas coverage
• Contaminated gas or improper gas
• Oil, dirt or other contaminant on tube ID/OD.
• Hole in gas line aspirating air
• Pre-purge/post-purge time too short
• Poor welding tube alloy
• Gas ow rate ID or OD too low
… 48 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Kemppi A7 TIG Orbital System 300 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Kemppi A7 TIG Orbital System 300 in the language / languages: English as an attachment in your email.

The manual is 4,08 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info