―E16―
7. WELDING PREPERATION (continued)
7.2 Mounting of the Feed Roll
Confirming of the wire size marked on the feed roll
Use the proper feed roll for the wire size.
The feed roll of
φ
1.2 wire size is mounted on the CMAW-7401
wire feeder.
Replacing of the feed roll
1. Remove the hexagon socket cap screws fixing the feed
roll.
2. Bring down the pressure handle, and then lift the pressure roll holder.
3. Separate the feed roll from the wire feeder by pulling out the feed roll toward you.
4. Mount the feed roll, with the wire size marked on the wire feeder facing out.
Adjusting of the wire pressure and straightner
•
Set to the proper wire pressure for the wire type by turning the pressure handle.
•
The numeral on the pressure scale set with the right pressure handle should be correspond to the one
set with the left pressure handle.
Recommended wire pressure adjustment
Wire diameter
Pressure
handle scale
Wire straightner
scale
（
φ
mm
）
（
inch
）
Hard aluminum
AL/MG (HARD)
1.6
1/16
2-3
2-3
1.2
3/64
1-2
3-4
1.0
0.035
1-2
4-5
Soft aluminum
AL/PURE (SOFT)
1.6
1/16
2-3
2-3
1.2
3/64
1-2
4-5
Mild steel
Stainless steel
Brazing
1.6
1/16
3-4
(2-3)
1.4
0.055
3-4
(3-4)
1.2
0.045
2-3
(3-4)
1.0
0.040
2-3
(4-5)
0.9
0.035
2-3
(4-5)
0.8
0.030
1-2
(4-5)
0.6
0.023
1-2
(4-5)
*Applicable wire diameter of brazing wire is
φ
0.8, 0.9, 1.0 and 1.2.
*Refer to section 8.3 for wire feeding of other than aluminum.
Groove for
φ
1.2 wire size
Wire size mark
Hexagon socket cap screws
Feed roll
