Century FC-90 Manuel De L'opérateur page 13

FC 90
TABLE B.1
Welding Wire
relative to Weld
common Weld
rePlace Parts list
Contact Tip (.035")
Drive Roll
Nozzle
FCAW Wire
.035 Lincoln NR-211-MP (Innershield Cored Wire)
Contact Tip
Drive Roll
0.9mm Knurled groove - Lincoln Part No. KP4364-035
Remember: Remove the contact tip prior to loading wire
Keep tension on the wire to prevent unspooling.
Loading The
1. Cutoff the bent portion of the wire and straighten the first 4" for feeding into rolls and gun.
Wire
2. Release spring loaded pressure arm and rotate the Idle Roll Arm away from Drive Roll.
3. Thread wire through the guide tube, over drive roll and into gun liner. Close Idle Roll arm.
The suggested Wire Feed Speed settings in the table below are based on a midrange wire tension
Wire Feed
setting. The tension may be changed if required to improved wire feeding; however, the WFS setting may
Tension
have to be adjusted from the values in the table below.
Steel Thickness
18 Ga Steel
Suggested
16 Ga Steel
Settings For
14 Ga Steel
Welding
12 Ga Steel
1/8" Steel
Weld at a Steady Pace
Do NOT weave the arc, neither forward, backward, or sideways
Helpful Hints Remove Slag with the Chipping Hammer to expose weld
For Horizontal Weld Joints, remember: "Drag if there's Slag"
Refer to Manual for Troubleshooting Poor Weld Quality
Direction of
Horizontal: "Drag"
Welding AND
Angle of Gun
Direction
Proper Gun 45°
Tee Joint
Angles for
Joint Types
Maintain an electrode Stickout
Electrical
of 3/8" while welding.
Stickout
KH712 (.035" / 0.9MM)
KP4364-035
KH726
LINCOLN .035 NR-211-MP
FCAW -Gasless (Flux Cored)
.035 (0.9mm) - Lincoln Part No. KH712
Wire Feed Speed
6
6.5
7.5
8
8.5
Vertical Up
Butt Joint Lap Joint
CONTACT TIP
ELECTRODE
Use of this unit on thicker materials than recommended may
result in welds of poor quality. The welds may appear to be
fine, but may lack the fusion or bonding necessary to give a
strong weld. This is called "Cold Casting" or "cold lapping"
and is some what similar to a cold solder joint. Weld failure
may result.
9
Heat Range
5
6
7
8
8.5
Vertical Down
45°
3/8
WARNING
OPERATION
R