Adjusting Table Parallelism - Grizzly G0490 Owner's Manual

checking Infeed Table
To check the infeed table parallelism:
1.
Follow all the steps for checking the outfeed
table parallelism to first make sure that the
outfeed table is parallel with the cutterhead.
— if the outfeed table is not parallel to the
cutterhead body, correct this issue before
continuing with the procedure.
2.
Correctly adjust the outfeed table height
(refer to Setting Outfeed Table height on
Page 43 for detailed instructions).
3. rotate the cutterhead so the knives/inserts
will not interfere, then place the straightedge
halfway across the infeed table and halfway
over the outfeed table and adjust the infeed
table even with the outfeed table, as shown
in figure 63.
Straightedge
Outfeed Table
figure 63. infeed and outfeed tables set evenly
(knife-style cutterhead shown).
4. place the straightedge in the positions shown
in figure 64. in each position, the straight-
edge should sit flat against both the outfeed
table and the infeed table.
Black Lines Represent
Straightedge Positions
from Overhead View
figure 64. straightedge positions for checking
infeed/outfeed table parallelism.
Model g0490/g0490X (Mfg. since 3/09)

Adjusting Table Parallelism

For safe and proper cutting results, the tables
must be parallel to the cutterhead. adjusting them
to be parallel is a task of precision and patience,
and may take up to one hour to complete. luckily,
this is considered a permanent adjustment and
should not need to be repeated for the life of the
machine.
Due to the complex nature of this task, we rec-
ommend that you double check the current table
positions to make sure that they really need to be
adjusted before starting.
Each table has four eccentric bushings under its
four corners that allow the table to be adjusted
Infeed Table
parallel. these eccentric bushings are locked in
place by piggybacked set screws (one on top of
the other) and adjust when these set screws are
rotated.
the correct order for adjusting the table parallel-
ism is to first adjust the outfeed table parallel with
the cutterhead, then adjust the infeed table paral-
lel with the outfeed table.
When setting the outfeed table, all measurements
Must be made from the cutterhead body—not
the knives/inserts or the results may be skewed.
—if the straightedge sits flat against both the
infeed and outfeed table, then the tables
are parallel. replace the cutterhead guard,
fence, and rear stand panel.
—if the straightedge does not sit flat against
both the infeed and outfeed table in any
of the positions, then follow the Adjusting
Table Parallelism instructions.
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