Grizzly G0709 - Manual (Page 62)

-60-
Model G0709 (Mfg. Since 5/11)
symptom possible Cause possible solution
entire machine
vibrates
excessively upon
startup and while
running. 1. Workpiece is unbalanced.
2. Worn or broken gear present.
3. Chuck or faceplate has become unbalanced.
4. spindle bearings at fault.
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.
Cutting tool
or machine
components
vibrate
excessively
during cutting. 1. tool holder not tight enough.
2. Cutting tool sticks too far out of tool holder;
lack of support.
3. gibs are out of adjustment.
4. dull cutting tool.
5. incorrect spindle speed or feed rate.
1. Check for debris, clean, and retighten.
2. re-install cutting tool so no more than
1 ⁄
3
of the total
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).
Can't remove
tapered tool from
tailstock quill. 1. Quill had not retracted all the way back into the
tailstock.
2. debris is binding arbor in quill.
3. incorrect arbor or tooling inserted into quill.
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.
Cross slide,
compound rest,
or carriage
feed has sloppy
operation. 1. gibs are out of adjustment.
2. handwheel is loose or has excessive
backlash.
3. leadscrew mechanism worn or out of
adjustment.
1. tighten gib ( page 61).
2. tighten screws and adjust backlash ( page 63).
3. tighten any loose fasteners on leadscrew
mechanism.
Cross slide,
compound rest,
or carriage feed
handwheel is
hard to move. 1. gibs are loaded up with shavings or grime.
2. gibs are too tight, gib lock or carriage lock is
applied.
3. Backlash setting too tight (cross slide only).
4. Bedways are dry.
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.
Bad surface
finish. 1. Wrong rpM or feed rate.
2. dull tooling or poor tool selection.
3. too much play in gibs.
4. tool too high.
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.
inaccurate
turning results
from one end of
the workpiece to
the other. 1. headstock and tailstock are not properly
aligned with each other.
1. realign the tailstock to the headstock spindle bore
center line ( page 36).
Chuck jaws won't
move or don't
move easily. 1. Chips lodged in the jaws. 1. remove jaws, clean and lubricate chuck threads,
and replace jaws.
Carriage won't
auto feed, or
overloads the
spindle motor. 1. Carriage or gib lock is applied.
2. gears are not all engaged or broken.
3. gibs are too tight.
4. leadscrew shear pin has sheared. 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.
tailstock quill will
not feed out of
tailstock. 1. Quill lock lever is tightened down. 1. turn lever counterclockwise.
Operation & Work Results