Grizzly G0709 Owner's Manual page 62

Operation & Work Results
symptom possible Cause
entire machine 1. Workpiece is unbalanced.
vibrates
excessively upon 2. Worn or broken gear present.
startup and while 3. Chuck or faceplate has become unbalanced.
running.
4. spindle bearings at fault.
Cutting tool 1. tool holder not tight enough.
or machine 2. Cutting tool sticks too far out of tool holder;
components lack of support.
vibrate 3. gibs are out of adjustment.
excessively 4. dull cutting tool.
during cutting. 5. incorrect spindle speed or feed rate.
Can't remove 1. Quill had not retracted all the way back into the
tapered tool from tailstock.
tailstock quill. 2. debris is binding arbor in quill.
3. incorrect arbor or tooling inserted into quill.
Cross slide, 1. gibs are out of adjustment.
compound rest, 2. handwheel is loose or has excessive
or carriage backlash.
feed has sloppy 3. leadscrew mechanism worn or out of
operation. adjustment.
1. gibs are loaded up with shavings or grime.
Cross slide,
compound rest,
or carriage feed 2. gibs are too tight, gib lock or carriage lock is
handwheel is applied.
hard to move. 3. Backlash setting too tight (cross slide only).
4. Bedways are dry.
Bad surface 1. Wrong rpM or feed rate.
finish. 2. dull tooling or poor tool selection.
3. too much play in gibs.
4. tool too high.
inaccurate 1. headstock and tailstock are not properly
turning results aligned with each other.
from one end of
the workpiece to
the other.
Chuck jaws won't 1. Chips lodged in the jaws.
move or don't
move easily.
Carriage won't 1. Carriage or gib lock is applied.
auto feed, or 2. gears are not all engaged or broken.
overloads the 3. gibs are too tight.
spindle motor. 4. leadscrew shear pin has sheared.
tailstock quill will 1. Quill lock lever is tightened down.
not feed out of
tailstock.
-60-
possible solution
1. re-install workpiece so it is as centered with spindle
centerline.
2. inspect gears and replace if necessary.
3. rebalance chuck or faceplate; contact a local
machine shop for help.
4. Adjust or replace spindle bearings.
1. Check for debris, clean, and retighten.
2. re-install cutting tool so no more than
length is sticking out of tool holder.
3. tighten gib screws at affected slide (page 61).
4. replace or re sharpen cutting tool.
5. use the recommended spindle speed or feed rate
(page 41).
1. turn the quill handwheel until it forces taper out of
quill.
2. extend quill to expose drift slot and use drift key to
remove arbor.
3. remove quill and drive out tooling or arbor with
punch.
1. tighten gib (page 61).
2. tighten screws and adjust backlash (page 63).
3. tighten any loose fasteners
mechanism.
1. remove gibs, clean ways/dovetails, lubricate, and
readjust gibs.
2. loosen gib adjustment and gib locks, release
carriage lock (page 61).
3. slightly loosen backlash setting (page 63).
4. lubricate bedways and handles.
1. Adjust for appropriate rpM and feed rate.
2. sharpen tooling or select a better tool for the
intended operation.
3. tighten gibs (page 61).
4. lower the tool position.
1. realign the tailstock to the headstock spindle bore
center line (page 36).
1. remove jaws, clean and lubricate chuck threads,
and replace jaws.
1. release locks.
2. Adjust gear positions or replace.
3. loosen gib screw(s) slightly (page 61).
4. Correct the cause of shear pin breakage, and
replace shear pin.
1. turn lever counterclockwise.
Model G0709 (Mfg. Since 5/11)
⁄ of the total
1
3
on leadscrew