NUTOOL MC250N - Maintenance and Troubleshooting; Lubrication and Upkeep; Fault Finding Guide

32
GB
PROBLEM POSSIBLE CAUSE REMEDY
The saw will not start
Saw is not plugged in and switched on Plug in and switch on
Fuseblown,circuitbreakeror(RCD)has
tripped
Replacefuse,re-setcircuitbreakeror(RCD).
Does not make accurate
45°or90°ripcuts
Tilt stops not adjusted correctly
Check the blade using a set square and adjust
thestopcorrectly.Adjustthepointerto0°
Tilt pointer not set at accurately
The material pinches the
blade when ripping
Ripfenceisnotalignedwiththeblade. Check alignment of blade and adjust
Warpedmaterial,theedgeagainstthe
ripfenceisnotstraight.
ifrequired.Trueupunevenedge.
Select another piece of material
The material binds on
therivingknife.
The riving knife is not correctly aligned
with the blade
Check the alignment of the riving
knifeandadjustifrequired.
The blade set is narrower than the riving
knife.
Selectanotherbladeorrivingknife.
The material is kicked
backfromtheblade.
The rip fence is out of alignment
Check the alignment of the rip fence
andadjustifrequired.
The riving knife is not aligned with the blade or
notfitted.
Check the alignment of the riving knife and
adjust/fitifrequired.
Feeding the material without using the rip
fence.
Installtheripfence.
Releasingthematerialbeforethecutis
completed
Feed the material all the way through before
releasing the material
Adullblade Replacetheblade.
The mitre gauge locking knob is not tightened Secure the locking knob
The saw makes an
unsatisfactory cut
Dull blade Mountthebladethecorrectwayround.
Blade mounted backwards Fissarelalamanelsensocorretto.
Gum or pitch build up on the blade
Removethebladeandcleanwith
suitablecleanerandsteelwool.
Incorrect blade for the operation Usethecorrectblade.
Gum or pitch build up on the table
causing erratic feed
Clean the table with suitable cleaner
andsteelwool.
FAULT FINDING
andoperatingproperly.Checkthatthebladeissetto90°andat
itslowestposition.Ensurethatthetableisclearofanytoolsor
othermaterials.Ensurethatallnuts,boltsandotherfastenings
aresecure.Ifthemachinemakesanyunusualnoiseorvibrates
excessively, STOP the machine immediately and investigate the
causeandrectify.IfthecausecannotbeidentifiedNONOTuse
themachineandcontactyournearestservicecentre.
LUBRICATION (PIC.40)
Before lubricating, remove the bottom safety cover by removing
thecrossheadpanscrews.(Pic.40) Lubricate the blade tilting
operating screw and both pairs of locking and adjustment nuts
and the blade elevating threaded rod once a month using a light
machineoilorothersimilarlubricant.
MAINTENANCE
Do not make any adjustment while the motor is in motion,
Alwaysmakesurethemachinesplughasbeenremovedfrom
the mains power source before changing brushes, lubricating
orwhendoinganyworkormaintenanceonthemachine.After
each use, check your machine for damage or broken parts and
keep it in top working condition by repairing or replacing parts
immediately.Cleanoutaccumulateddust.Duringusethecarbon
brushes will wear down, this will be indicated by a possible loss
of power and excessive sparking seen through the ventilation
slots.Whenthebrusheshaveworndowntoapproximately4-
5mmtheywillrequirereplacing.Removethetworoundcover
plates, one on either side of the motor casing (Pic.41).Remove
the worn carbon brush and replace it with the new one, and
re-fittheroundcoverplate,Repeatthisoperationfortheother
carbonbrush.Replacetherectangularcoverplateandsecure
withthescrew.NOTE:Carbonbrushesmustalwaysbechanged
asapair.
WARNING
To assure safety and reliability, all repairs with the exception
of externally accessible brushes should be performed by
AUTHORISED SERVICE CENTRE or any other authorised
servicecentreororganisations.
NOTE: In all cases where electrical problems occur consult a
qualifiedelectrician.Isolatethemachineandunplugfromwall
socket before attempting to work on the machine even if the
problemseemsminor.