Jet LF-20, Operating Instructions And Parts Manual, Page: 8 / 20

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Figure 7-3: Double Seam setup (optional roll set)
Figure 7-4: Drive Cleat setup (optional roll set)
Always disconnect machine
from power before installing roll sets. Failure to
comply may cause serious injury.
7.2 Double Seam procedure
See Figure 7-3.
1. Disconnect machine from power source.
2. Remove top cover, and rear top plate.
3. Select first pair of rolls marked “T1” and “B1”,
and slide them on the shafts at the left, or entry
side, of machine. Place “T1” on top shaft, B1 on
bottom shaft. Insert key into keyway for each
roll. THE NUMBERED SIDES OF ROLLS
MUST FACE OUTWARD.
4. Repeat procedure with rolls “T2” and “B2”
through “T5” and “B5”, placing them in
sequence from left to right. All rolls marked “T”
should be on top shafts; all rolls marked “B”
should be on bottom shafts.
5. Fasten rolls to shafts with the provided socket
head cap screws and washers.
6. Lay straight edge against outside surface of
rolls, and position entry fence at 1-1/8”
clearance from straight edge, as shown in
Figure 7-3. Tighten down both screws on entry
fence.
7. Reinstall rear top plate, and top cover.
8. Adjust exit fence as follows: Run a test piece
through and stop machine when workpiece has
reached end of exit table but is still pinched
between the rolls. Move fence into position just
flush or slightly clear of workpiece edge. Exit
fence must not bear against workpiece. Tighten
down fence.
9. Start machine and feed workpiece.
7.3 Drive Cleat procedure
See Figure 7-4.
IMPORTANT: Make sure to cut the material a full 2-
1/8 inch wide to ensure an accurate cleat.
1. Disconnect machine from power source.
2. Follow same procedure as for double seam
rolls, but leave roll “T2” loose. This roll centers
itself to the bottom roll and should not be fixed
in place with a socket cap screw. However,
double head round keys are used with all the
rolls.
3. Position entry fence so that centerline of
material will align with centerline of rolls. This is
important – if it is not centered, the cleat will not
be accurate. Tighten down fence.
4. Reinstall rear top plate, and top cover.
5. Tighten hold-down stud (see Figure 7-1) so that
“T5” and “B5” rolls do not separate when drive
cleat passes through.