Southbend SB1001 - Manual (Page 60)

-58-
For Machines Mfg. Since 8/11 Model SB1001 8K ™ Lathe TROUBLESHOOTING
Symptom Possible Cause Possible Solution
Tapered tool
difficult to remove
from tailstock quill. 1. Quill is not retracted all the way
back into the tailstock.
1. Turn the tailstock handwheel until it forces the
tapered tool out of quill.
2. Contaminants not removed from
taper before inserting into quill.
2. Clean the taper and bore and re-install tapered tool.
Cross slide,
compound, or
carriage feed has
sloppy operation. 1. Gibs are out of adjustment. 1. Adjust gib screws (see Page 54).
2. Ways are loaded with grime or
chips.
2. Clean the ways and re-lubricate.
3. Leadscrew mechanism worn or out
of adjustment.
3. Replace leadscrew and nut.
Cross slide, or
compound rest ball
handle is hard to
move. 1. Dovetail slides loaded with
shavings, dust, or grime.
1. Remove gibs, clean ways/dovetails, lubricate, and
re-adjust gibs.
2. Gib screws are too tight. 2. Loosen gib screws slightly (see Page 54).
3. Bedways are dry. 3. Lubricate bedways (see Page 52).
Cutting tool
or machine
components vibrate
excessively during
cutting. 1. Tool holder not tight enough. 1. Check for debris, clean, and retighten.
2. Cutting tool sticks too far out of tool
holder; lack of support.
2. Re-install cutting tool so no more than 1 ⁄
3
of the total
length is sticking out of tool holder.
3. Gibs are out of adjustment. 3. Adjust gib screws at affected component (see Page
54)
4. Dull cutting tool. 4. Replace or resharpen cutting tool.
5. Incorrect spindle speed or feed rate. 5. Use the recommended spindle speed.
Workpiece is
tapered. 1. Spindle and tailstock centerlines
are not properly aligned with each
other.
1. Realign the tailstock to the headstock spindle bore
centerline (see Page 31).
Carriage will not
feed or is hard to
move. 1. Carriage lock is tight. 1. Check to make sure the carriage lock is loose.
2. Chips have loaded up on bedways. 2. Frequently clean away chips that load up during
turning operations.
3. Bedways are dry and in need of
lubrication.
3. Lubricate bedways and handles.
4. Gibs are too tight. 4. Loosen gib screw(s) slightly (see Page 54).
5. Gears broken. 5. Replace gears.
Chuck jaws will
not move or do not
move easily. 1. Chuck needs lubrication. 1. Remove jaws, then clean and lubricate all surfaces.
2. Chips lodged in the jaws or scroll
plate.
2. Remove jaws, clean and lubricate scroll plate, then
replace jaws.
Gearbox change
levers will not shift
into position. 1. Gears not aligned inside headstock. 1. Rotate spindle by hand with light pressure on the
lever until gear falls into place.