Climax BW2600, Operating Manual

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P/N 85555, Rev. 6 Page 65
This procedure is helpful in assuring consistent wire feeding. Be careful not to
over-tighten the setscrews that secure the liner.
5.5 T
ROUBLESHOOTING
This section is intended to help solve basic machine performance problems.
Contact CLIMAX for serious maintenance or for questions on the following
procedures.
5.5.1 If the feed will not work
The feed will not work under the following conditions:
• The feed knob is not fully pulled out to engage the feed.
• The drag brake is set too tight. A maximum of 10 in-lbs (1.13 Nm) is
required to allow manual axial spindle movement, yet also allow retrac-
tion of the spindle and torch components when the spindle feed is
engaged.
• The cam follower arm is not resetting. For example, the indicator on
top of the machine is not returning to the “maximum feed amount”
indication after each step. This could be due to the loosening of the
spring that keeps the cam follower up against the cam, or if something
is jamming the cam follower arm.
5.5.2 If there is a lack of fusion to the bore surface
Lack of fusion in MIG welding occurs when the weld metal lacks a metallurgical
bond to the base metal.
Reasons for lack of fusion include the following:
• The rotational travel speed is too slow. Proper travel speed allows the
arc to play on the puddle and the base metal simultaneously, providing
complete fusion. Slowing rotation speed prevents the arc from playing
on the base metal, limiting fusion.
• The step size is too short, causing the weld to play on the previous bead
and not the base metal, causing a lack of fusion.
5.5.3 If the wire feeding stops and wire burns back to tip
A mechanical blockage of the welding wire causes wire feeding to stop and wire
burn back.
This may be caused by a pile-up of debris at the “cone” entrance to the contact tip.
This debris jams between the wire and contact tip bore. When the wire stops and
the welding power supply remains on, the wire burns back to the contact tip and
the contact tip melts as it becomes the new electrode.