DoAll C-4033NC - Page 44

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TROUBLESHOOTING(Continued….)
7. Sawbandbeingusedisincorrect.
8. Coolantmixtureistooweak,orincorrectcoolantis
beingused.
9. Thesawbandisnotproperlytensioned
10. Decreasefeedpressureto“breakin”anewsaw
bandonitsfirstfewcuts.
BLADETEETHSTRIPPING
1. Increasebandspeedordecreasefeedpressure.
2. Checkforchipwelding,orachippedbladetooth
lodgedinthecut.
3. Faultystockisbeingused:checkforheavyscale,
inclusions,hardspots,etc.
4. Checkforaworn,orimproperlyadjustedband
brush.
5. Checkforvibrationscausedbyloosevisejaw
clampingagainsttheworkpiece.
6. Checkforwornsawbladeinsertsand/orcarbide
back‐uporrollerback‐up.
7. Coolantisnotbeingappliedcorrectly.
8. Checkforincorrectsawbandtensionbeingused.
9. Sawbandpitchmaybetoocoarseforthicknessof
stocksection.
SAWBANDBREAKAGE
1. Thesawbandisdroppedintotheworkpiecedue
toincorrectsawheadfeedingrate.
2. Increasebandspeedbeingusedand/ordecrease
feedforce.
3. Checkforstocknotbeingheldfirmlybythevise
jaws.
4. Checkforincorrectadjustmentofthesawguide
insertsandcarbideback‐upguides.
5. Checkforinsufficientcoolantflow.
6. Useafinerpitchsawband.
7. Checkforincorrectsawbandtension.
SAWBANDISNOTRUNNINGTRUEAGAINSTTHE
SAWGUIDEBACK‐UPBEARINGS/CARBIDEBACK‐
UPS.
1. Examinetheback‐ups.Replacethemiftheyare
chippedorwornmorethan0,5mm.
2. HaveaDoALLservicerepresentativecheck
machinealignment.
3. Checkforwornsawguidepivotbolts.
4. Leftsawguidearmisloose,ornotpositionedclose
enoughtothestock.
INACCURATECUT‐OFF
1. Checkforwornordullbladeteeth.
2. Checkforahardspotinthematerialbeingcut.
3. Bandbrushisnotproperlycleaningtheblade
teeth.
4. Increasebandspeedordecreasefeedforce.
5. Checkfordirtycoolant.Replaceifnecessary.
6. Checkforcrookedstock(resultsinstraightbutnot
squarecuts).
7. Leftsawguidearmisloose,ornotpositionedclose
enoughtothestock.
8. Sawbandpitchchoiceinincorrect.
9. Checkforincorrectsawbandtension.
10. Checkforincorrectadjustmentofinserts,back‐up
bearing,orwornpivotbolts.
11. Checkmachinealignment(contactDoALL).
12. Checkforcoolantnotbeingsuppliedevenlyto
bothsidesofthesawband.
SURFACEFINISHOFCUT‐OFFPIECEISTOOROUGH
1. Checkforvibrationwhilesawing.
2. Checkforadamagedsawband.
3. Useafinerpitchsawband.
4. Increasebandspeedand/ordecreasefeedrate.
5. Checkthesawbandback‐upguidesforwear.
Replacethemifnecessary.
6. Checkforincorrectsawbandtension.
CUTTINGRATEISTOOSLOW
1. Increasethefeedrate.
2. Increasebandspeedand/orfeedrate.
3. Useacoarserpitchsawband.
STOCKFEEDSERRATICALLY
1. Checkforlowhydraulicsystemoillevel.
INDEXWON’TMOVEFORWARD
1. Checktoseeifthevisesolenoidisoperating.
VISESWON’TTRANSFERAFTERANINDEX
1. Checkforfaultyoperationoftheindexforward
limitswitchontheindexvisebase.
2. Checktoseeifthevisesolenoidisoperating.