Welding Problems - Lincoln Electric IM355-C LN-9 GMA Operator's Manual

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Observe Safety Guidelines
detailed in the beginning of this manual.
PRObLEMS
(SYMPTOMS)
Poor arc striking with sticking or
"blast-offs", weld porosity, narrow
and ropy-looking bead, or electrode
stubbing into plate while welding.
If for any reason you do not understand the test procedures or are unable to perform the necessary tests/repairs
safely, contact your local authorized field service facility before you proceed.
TROUbLESHOOTING
POSSIbLE AREAS OF
MISADJUSTMENT(S)

WELDING PRObLEMS

1. Verify that the welding techniques
or procedures being used are
proper. See "Gas Metal Arc
Welding Guide"
"lnnershield Production Welding
Guide" (N675),
Procedure Guidelines" (GSP-70,
GSP-71), "Procedure Guidelines
for Pulsed Spray Welding" (GSP-
PULSE) or "How To
Submerged Arc Welders" (S604).
2. Check that the wire feed
acceleration setting is proper for
the process. See the topic
"Starting Characteristics" in the
Operation section for proper
acceleration setting.
3. Check that the Voltage Control
Response is properly set for the
power source and process. See
the topic "Voltage
Response" in the Operation
section and the appropriate
power source
diagram.
CAUTION
LN-9 GMA and LN-9F GMA Wire Feeder
TROUbLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
If all recommended possible
areas of misadjustment have
been checked and the problem
(GS-100), persists,
Lincoln Authorized Field Service
"Outershield Facility.
Make
Control
connection
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contact your local