Grizzly G2790 Owner's Manual page 28

Operation
symptom possible Cause
Wavy pattern on 1. machine vibrating.
workpiece surface.
2. Workpiece loose in clamping device.
3. Wheel face is uneven.
4. Wheel grade is too hard.
lines on workpiece 1. impurity on wheel surface.
surface.
2. Workpiece loose in clamping device.
Burned spots 1. improper type of grinding wheel.
or cracks in
2. Feed rate too slow.
workpiece.
3. depth of cut too great.
4. Workpiece overheating.
Wheel dulls quickly, 1. depth of cut too great.
grit falls off.
2. Wheel grade is too soft.
3. Wheel exposed to moisture.
4. Wheel dressed incorrectly.
5. defective wheel bonding.
Wheel clogs and 1. Wheel grade is too hard.
workpiece shows
2. Feed rate too slow.
burn marks.
3. Wheel dressed incorrectly.
4. Workpiece incorrect material.
Cutting tool is ground 1. tool not properly clamped.
unevenly from one
2. grinding table and wheel not level with each
side to other.
other.
3. Wheel
impurities.
4. Wheel is damaged.
-26-
dressed incorrectly or
possible solution
1. shim/tighten mounting hardware.
2. Correctly re-clamp the workpiece.
3. dress the wheel (page 23).
4. use softer grade wheel; reduce depth of cut and
feed rate.
1. dress the wheel (page 23).
2. Correctly re-clamp the workpiece.
1. use the correct type of grinding wheel (page 15).
2. increase feed rate.
3. reduce depth of cut; take multiple light passes.
4. grind in short durations and allow workpiece to cool
in between.
1. reduce depth of cut; take multiple light passes.
2. use harder grade of wheel.
3. store wheel away from moisture; replace wheel.
4. Correctly dress the wheel (page 23).
5. replace wheel (page 24).
1. use softer grade of wheel.
2. increase feed rate.
3. Correctly dress the wheel (page 23).
4. grind ferrous materials only.
1. properly re-clamp tool.
2. push down or pull up grinding table to make it level
with the wheel.
3. Correctly dress the wheel (page 23).
has
4. replace wheel (page 24).
g2790 universal Knife grinder