Trouble Shooting
| Powerfeed and Thread Cutting | |
| 1. Powerfeed does not move carriage | |
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Problem
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Solution |
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• Carriage locked
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• Unlock carriage
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• Speed selector not engaged
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• Select speed I or II or III,
engage drive selector
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• Sheared pin
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• Replace pin
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• Gears not meshing
or teeth missing
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• Check gears and adjust
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• Inch/metric lever in neutral
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• Engage fully
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| 2. Cut is not smooth | |
| Problem | Solution |
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• Tool dull
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• Sharpen or replace tool
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• Tool not on center
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• Center tool
(shim, if needed)
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• Tools not mounted tightly in post
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• Remount tools
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• Cross-slide gibs to bed
and base loose
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• Adjust gibs
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• Gibs in toolpost loose
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• Adjust gibs in toolpost
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• Tool turret not tight
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• Tighten toolpost
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• Feed rate too fast
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• Choose correct setting
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• Gear loose
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• Tighten gears and posts
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| 3. Thread is not smooth | |
| Problem | Solution |
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• Tool dull
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• Sharpen tool
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• Tool not centered
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• Center tool
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• Tools not mounted tight in post
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• Remount tool
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• Cross-slide gibs to bed
and base loose
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• Adjust gibs
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• Gibs in compound loose
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• Adjust gibs
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• Tool turret not tight
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• Tighten toolpost
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• Gears loose
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• Tighten gears and posts
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| 4. Tools is not cutting “on thread” | |
| Problem | Solution |
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• Powerfeed slipping
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• Engage halfnut fully
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• Clutch slipping
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• Tighten screws (6)
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| Carriage/Milling Table | |
| 1. Table won't move | |
| Problem | Solution |
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• Table locks engaged
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• Loosen locks
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• Gibs too tight
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• Loosen gibs
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2. Horizontal and vertical movement
in cross-slide table
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| Problem |
Solution |
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• Carriage gib improperly adjusted
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• Adjust carriage gib
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• Table gib improperly adjusted
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• Adjust table gib
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3. Carriage moves smoothly in only
one direction
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| Problem |
Solution |
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• Debris on way or gib
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• Remove debris
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• Burr on gib
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• Remove burr with fine file
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• Gib improperly tensioned
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• Loosen gib and re-tension
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• One or more wipers mounted too low
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• Reposition wiper(s)
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4. Cross slide handwheel turns
during cutting operations
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| Problem | Solution |
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• Cross-slide brass nut worn
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• Tighten or replace brass nut
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• Carriage lock not tight
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• Tighten carrriage locks
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• Gibs too loose
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• Readjust gibs
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| 5. Too much backlash in the cross-slide | |
| Problem |
Solution |
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• Loose screw
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• Tighten screw, review how to
eliminate backlash
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• Loose brass nut
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• Put a shim between the
stud on the nut and the
side of the hole
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• Worn brass nut
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• Replace brass nut or adjust
screw at end of nut
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• Excessive space between bearing
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• Add shim washer and dial
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| Lathe Turning | |
| Problem | Solution |
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• Tool dull
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• Sharpen or replace tool
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• Tool not ground properly
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• Regrind tool
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• Tool at wrong angle
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• Correct tool position
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• Tools not held tightly
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• Tighten toolholder
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• Wrong cutter for material
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• Use correct cutter
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• Cutting speed incorrect
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• Increase or reduce speed
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| 2. Work has unwanted taper | |
| Problem | Solution |
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• Work improperly aligned
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• Realign centers on work
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• Debris in spindle, setup, or tools
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• Clean and reset setup,
work, or tool
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• Offset tailstock incorrectly positioned
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• Correct position of tailstock
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• Spindle bearings loose
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• Tighten taper bearings
to return to alignment,
replace spindle bearings
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| 3. Machine vibrates | |
| Problem | Solution |
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• Work mounted wrong
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• Remount work
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• Speed too high
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• Reduce Speed
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• Too much pressure at tailstock
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• Reduce pressure and
increase lubrication
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4. Work stops turning but machine
continues to run
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| Problem | Solution |
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• Work not mounted securely
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• Remount work
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• Tools forced into
work/ excessive cut
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• Reduce force on tools
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• Belts slipping
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• Tension belts, use belt
dressing, or replace belts
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| 5. Diameter of work is not consistent | |
| Problem | Solution |
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• Too much flex in workpiece
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• Use a follow rest,
use tailstock center
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• Too much flex compound rest,
cross slide, or carriage
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• Tighten gibs, clean ways
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| 6. Too much backlash in the compound | |
| Problem | Solution |
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• Loose spanner nuts
• Worn Nut
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• Tighten spanner nuts
• Replace nut
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7. Machine slings oil from behind
the chuck or in belt box
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| Problem |
Solution |
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• Oil reservior overfilled
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• Check oil lever
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• Worn oil seal
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• Replace felt in seal
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| Milling | |
| 1. Tool chatter | |
| Problem | Solution |
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• Gibs too loose on cross
slide, compound, or carriage
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• Readjust gibs
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• Unused feeds not locked
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• Lock all axes but the one
moving
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• Millhead not locked
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• Lock millhead
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• Quill too loose
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• Tighten quill lock
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• Tool not on center
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• Center tool
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• Improper tool shape, tool dull
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• Reshape, sharpen, or replace
tool
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• Feed too light or slow
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• Adjust feed rate
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| 2. Depth of cut is not consistent | |
| Problem | Solution |
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• Quill moving
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• Lock quill
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• Setup wrong
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• Make sure setup is parallel to
table
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| Drilling | |
| 1. Hole is off center or bit wanders | |
| Problem | Solution |
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• Bit dull
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• Use sharp bits
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• Bit not mounted correctly in chuck
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• Remount tool
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• Bit bent
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• Replace bit
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• Chuck loose in spindle
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• Remount chuck on arbor
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• Drawbar not secured
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• Tighten drawbar
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• Debris on spindle
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• Clean debris and arbor
and remount tool
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• Bearing loose or worn
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• Tighten or replace bearings
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• Cutting too fast
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• Reduce speeed
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• Incorrect bit
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• Use correct bits
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• No pilot hole
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• Drill small pilot hole
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| 2. Entrance hole is out of round | |
| Problem | Solution |
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• Bit dull
• Incorrect drill bit
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• Use sharp bit
• Use correct drill bit
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| 3. Bit turns erratically or stops | |
| Problem | Solution |
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• Bit fed into work too fast
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• Reduce feed rate
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• Belts slipping
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• Reduce feed rate, retension
belts
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| 4. Chuck is difficult to tighten or loosen | |
| Problem | Solution |
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• Chuck sticking
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• Apply lubricant
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• Debris in chuck
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• Clean chuck
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| 5. Chuck wobbles | |
| Problem | Solution |
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• Chuck loose on arbor
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• Clean arbor and remount
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• Drawbar not tight
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• Clean spindle and replace drawbar
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| Drive System | |
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1. Turn on the machine and
nothing happens
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| Problem | Solution |
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• Breaker Blown
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• Reset circuit breaker
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• Machine unplugged
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• Plug in the machine
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• Loose electrical connections
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• Tighten wiring connections
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• Electrical components bad
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• Replace defective parts
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2. Motor and pulleys turn,
but not lathe or mill
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| Problem | Solution |
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• Mill or lathe not selected
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• Select proper function
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Promo
