Grizzly G0857, Owner'S Manual

Page: 41 / 65

-38-
Model G0857/G0858 (Mfd. Since 07/19)
Machine Operation
Symptom Possible Cause Possible Solution
Table is hard to
adjust. 1. Table lock engaged/partially engaged.
2. Table stop blocking movement. 1. Completely loosen table lock (
Page 5).
2. Loosen/reset table stop (
Page 33).
Excessive snipe
(gouge in end of
board that is uneven
with rest of cut). 1. Outfeed table set too low.
2. Knives set too high (G0857).
3. Operator pushing down on trailing end of
workpiece as it leaves cutterhead.
1. Align outfeed table with cutterhead knife/insert at
top dead center (
Page 46).
2. Adjust height of knives evenly with outfeed table
(
Page 40).
3. Reduce/eliminate downward pressure on trailing
end of workpiece as it leaves cutterhead.
Workpiece stops in
middle of cut. 1. Outfeed table set too high. 1. Align outfeed table with cutterhead knife/insert at
top dead center ( Page 46).
Workpiece
chipping, tear-out,
indentations, or
overall rough cuts. 1. Workpiece not suitable for jointing.
2. Operator not feeding workpiece to cut
"with" the grain.
3. Feed rate too fast.
4. Excessive depth of cut.
5. Dull knives/inserts.
6. Dust collection problems.
1. Ensure workpiece is suitable for jointing ( Page 26).
2. Turn workpiece 180° before feeding again.
3. Reduce feed rate.
4. Reduce depth of cut.
5. Sharpen/replace knives (
Page 40); rotate/replace
inserts ( Page 42).
6. Clear blockages, seal leaks, move machine closer
to dust collector, upgrade dust collector.
Fuzzy grain left in
workpiece. 1. Wood has high moisture content.
2. Dull knives/inserts.
1. Ensure wood moisture content is less than 20%.
Allow to dry if necessary.
2. Sharpen/replace knives ( Page 40); rotate/replace
inserts ( Page 42).
Long lines or ridges
that run along length
of workpiece. 1. Nicked or chipped knives/inserts.
2. Inserts not consistently tightened/torqued
(G0858).
3. Dirt or debris under inserts (G0858).
1. Replace knives (
Page 40); rotate/replace inserts
(
Page 42).
2. Tighten/torque all inserts consistently when rotating/
replacing (
Page 42).
3. Remove inserts, properly clean mounting pocket
and re-install (
Page 42).
Uneven cutter
marks, wavy
surface, or chatter
marks across face
of workpiece. 1. Feeding workpiece too fast.
2. Knives not properly adjusted (G0857).
3. Dirt or debris under inserts (G0858). 1. Reduce feed rate.
2. Properly adjust knives (
Page 40).
3. Remove inserts, properly clean mounting pocket,
and re-install ( Page 42).
Glossy surface;
scorching or
burn marks on
workpiece. 1. Feed rate too slow.
2. Dull knives/inserts. 1. Increase feed rate.
2. Sharpen/replace knives (
Page 40); rotate/replace
inserts (
Page 42).
Workpiece is
concave or convex
along its length after
jointing. 1. Workpiece not held with even pressure
against outfeed table during cut.
2. Workpiece excessively bowed or warped,
not suitable for jointing.
3. Tables are not parallel with cutterhead and
each other.
1. Apply even downward pressure against workpiece
throughout entire travel along outfeed side during
cut.
2. Ensure workpiece is suitable for jointing (
Page 26).
3. Check/adjust table parallelism (
Page 43).
Workpiece edges
not square; tapered
cut produced. 1. Fence not square to table(s); fence tilt
unlocked.
2. Knives not properly adjusted (G0857).
3. Inserts not consistently tightened/torqued
(G0858).
4. Warped infeed or outfeed table.
1. Square fence to table(s) ( Page 48); lock fence.
2. Properly adjust knives ( Page 40).
3. Tighten/torque all inserts consistently when rotating/
replacing ( Page 42).
4. Regrind/replace table.