5.Place the gauge blocks on the conveyor table and position them under the drum rollers, as shown in Figure 36.
Figure 36. Gauge blocks positioned under the
ends of the drums.
6.Raise the table until the gauge blocks just touch the rear drum.
Note: A good way to know when they are touching is to rock the rear drum back and forth while raising the table until you hear or feel contact with the gauge blocks.
7.Lower the table one full crank of the handwheel (taking handwheel freeplay into consider- ation; or in other words, wait until the chain starts moving before starting to count the handwheel rotation).
8.Starting at one end, find the largest size feeler gauge that can pass between the rear drum and your gauge block. (The feeler gauge should slide with moderate resistance, without forcing the drum to roll.)
9.Repeat Step 9 at the other end of the drum.
—If the difference between the two sizes is less than 0.002" (or the sizes were dead even), skip to Step 16.
—If the difference between the two sizes is more than 0.002", then one end must be adjusted to within 0.002" from the other (with the ultimate goal of making them dead even). Continue to the next step.
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10.Adjust the height of the drum ends by loosen- ing the locknuts and sliding the pillow bearing up or down along the wedge.
—If you need more room behind the drum, adjust the dust scoop as described in Dust Scoop Position on Page 37.
—If you need to move the drum up or down more than can be done at the pillow bear- ing, then you need to adjust the table lift screw in that corner. Refer to Table Lift Screws on Page 27.
11.At both ends, measure the distance between the edge of the rear drum and the rear upper frame angle, as shown in Figure 37. The dif- ference between these two measurements will tell you how close the drum is to being perpendicular to the feed direction.
Figure 37. Measuring distance between edge of
rear drum and the frame angle.
—If the difference between the two measure- ments at each end is within 1⁄8", skip to Step 14.
—If the difference between the two measure- ments at each end is more than 1⁄8", con- tinue to the next step.
12.Go to the end of the drum that has the great- est distance between the rear upper frame angle, and adjust the wedge bolt counter- clockwise until the distance between the upper frame angle is within 1⁄8" of the other end.
G0449/G0450 37" Drum Sander
