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ADJUSTMENTS
-16-
Figure 23. Front-drum to front-brace
measurement.
Right-Tracking Drum
Center-Tracking Conveyor
Left-Tracking Drum
Figure 22. Drums to conveyor path not parallel.
Figure 24. Front bearing block and nuts.
PART 2: Drum-to-Conveyor Parallelism
For this adjustment, you will align the front
drum so the sanding path runs parallel with the
conveyor belt feed path. You will then align the
rear drum to the front drum so it is parallel with
the front drum. See Figure 22.
To adjust the drum-to-conveyor parallelism, do
these steps:
1. At either end and at the surface of the front
drum, measure the distance between the
drum and the front brace. It should be
approximately
1
⁄2". See Figure 23.
• If the difference between the two
measurements is less than
1
⁄8", skip Steps
2 through 4, and go to Step 5.
• If the distance is greater than
1
⁄8", go to
Step 2.
2. Loosen the bearing-block mounting nuts on
one end of the front drum. See Figure 24.
3. Slide the drum and bearing block forward or
rearward to eliminate any front-drum to front-
brace measurement difference. Remember,
adjusting one drum-end slightly affects the
adjustment at the opposite end.
4. Tighten the nuts, recheck the measurement, and
readjust as necessary.
NOTICE
DO NOT over-tighten the bearing block
mounting nuts. The bearing blocks are
machined housings that can warp or crack if
the nuts are over-tightened.
NOTICE
If the drum-to-conveyor parallelism is out of
adjustment, the sandpaper may become loose
and load-up over to one side of the drum(s).
Mounting
Nuts
1
⁄2"