Jet 22-44 Pro-3, Operating Instructions And Parts Manual

Page: 15 / 40

15
Adjustments
Dust Cover
To access the drum, lift the front of the dust
cover using the handle and push back the front
cover all the way to secure it in open position.
The dust port should be on the back or outfeed
side of the sander.
When removing the dust cover for initial drum
alignment or other reasons, lift the front cover
half-way and pull the dust cover out from the
outfeed side of sander. The edges will pop out
when the dust cover is pulled from the carriage
leg brackets. Reverse this procedure to re-install
the dust cover.
The dust cover should not require removal for
fine tuning alignments or for changing or
cleaning the abrasives.
Table Height Control
Note: Read Table Support Screws (page 9)
before operating the handwheel.
The table height and depth of cut are controlled
by the
height adjustment handwheel (see
Figure 4). Rotating the handwheel raises or
lowers both sides of the table simultaneously by
transferring the handwheel rotation through the
miter gear and transfer rod assembly.
Check the operation of the height adjustment
mechanism. If it does not operate smoothly or
easily, check the following:
•
The set-screws in the table supports have
been loosened and readjusted (see Table
Support Screws page 9).
•
The sander has been leveled ( Leveling the
Sander – page 11).
•
Moving parts of the height adjustment
mechanism are well lubricated, including
miter gears, columns, and threaded
adjusting screws (
Maintenance – Page 26).
If the table height mechanism still does not
operate smoothly, try the following:
1. Further loosen the set-screws on the front of
the table supports (see Figure 3).
2. Lubricate thoroughly.
Apply penetrating lubricant to the table
supports where they contact the columns
and to all contact points of adjusting screws
and transfer rod (see
Features on page 7).
Also apply grease to the miter gears.
3. If the height adjustment still feels stiff:
Check for misalignment of adjusting screw
supports and table supports which could
cause binding on the adjusting screws. The
adjusting screw supports can be adjusted by
loosening the set-screws which secure them
to the columns, and rotating the supports to
proper position.
4. Check the miter gear alignment.
The miter gears can be adjusted on their
shafts by prying off their protective caps with
a flat blade screwdriver, and loosening the
set-screws on the gears. Check that the
gear mesh is not too tight or too loose, and
that the gear teeth align with the opposing
gear. Note that the collars located on the
transfer rod (see Features, page 7) should
be positioned to control the lateral
movement of the transfer rod to maintain
accurate miter gear alignment and mesh.
The mesh of the miter gears should be
smooth and even. If it is not, adjust the
gears for good mesh. Test for smooth
operation.
5. Next, check the position of the height
adjustment screws.
First raise the conveyor table. Then check
the retaining ring at the top of the height
adjustment screw on the outboard side
(Figure 17), and the retaining ring under the
height adjustment handle on the inboard
side of the machine. Both retaining rings
should be snug on their respective bearings.
If there is a space between the retaining ring
and the bearing, tighten one set-screw in
each of the table supports before performing
the following adjustment:
6. If one height adjustment screw is loose:
Remove the miter gear from the transfer rod
on that side. Turn down the threaded height
adjustment screw rod until it is snug. Make
sure both sides are snug on top and
retaining rings under the adjustment screw
supports are in place. Re-install the miter
gear. Loosen the set-screws in the table
supports and test for smooth operation.
Figure 17