Table Lift Screws - Grizzly G0449 Owner's Manual

Table Lift Screws

Tools Needed:
Wrench/Socket 14mm ....................................... 2
Flat Head Screwdriver ....................................... 1
Chalk, White-out, or Paint ................................. 1
The table lift screws are connected by a chain and
driven by the table elevation handwheel. When
the chain is removed from a sprocket on one of
the lift screws, that lift screw can adjust that por-
tion of the table up/down independently to assist
in setting the table parallel to the drums.
Adjusting the table lift screws will only be neces-
sary if you need to adjust the drum heights more
than allowed at the pillow bearing adjustments,
or if you have removed the table or chain during
a service procedure and you need to reset the
drums parallel to the table.
Each tooth on the sprocket represents 0.006" of
table elevation movement. For example, if the rear
of the table was 0.006" low, rotate both rear table
lift screws to the next sprocket tooth in the same
chain position. You can easily rotate the sprockets
from the top of the table lift screws with a flat head
screwdriver.
After adjusting the table lift screws, check to make
sure the drums and conveyor are parallel within
0.002" from one side to the other. If they are not
within this range, then additional fine adjustments
should be made at the drum pillow bearings.
To adjust the table lift screws:
1. DISCONNECT POWER TO SANDER!
2. Open the side cover.
3. Raise the table up to at least the 1" mark on
the height scale.
4. At the lift screw that needs to be adjusted,
mark the end of a sprocket tooth and the
chain hole where that tooth is meshed, as
shown in Figure 65.
-46-
Qty
Figure 65. Marking sprocket tooth and chain.
5.
Using two 14mm wrenches, loosen the adjust-
able idler roller (Figure 66).
Figure 66. Adjustable idler roller sprocket.
6.
Carefully move the chain off of only the
marked sprocket.
7.
Keep track of the marked chain hole and
rotate the sprocket the necessary number of
teeth away from the marked one to meet the
difference in height needed.
8.
Fit the chain back over the sprocket, making
sure the new sprocket tooth is inserted into
the marked chain hole.
9.
Re-tension the chain and check the new
height setting.
10. Repeat Steps 5–9 as needed until the table
height is parallel to the drums in all four cor-
ners, and calibrate the scale pointer (refer to
Page 45).
11. Follow instructions in Drum Adjustments
(Refer to Page 39) for adjusting the drums
parallel to the conveyor within 0.002" side-to-
side.
G0449/G0450 37" Drum Sander