Troubleshooting - Jet Elite EVC-400DGSP Manual

12.0 Troubleshooting

Problem
Teeth breaking
Rapid tooth wear
* WARNING: Some corrections may require a qualified electrician.
Possible Cause
Incorrect oil mist
lubrication
Material too hard
Saw blade not worn-in
correctly
Saw blade with excessively
fine tooth pitch
New blade inserted in a
partially completed cut
Work piece not clamped
firmly in place
Feed speed too slow
Feed speed too high
Insufficient coolant oil
Incorrect oil mist
lubrication
Material defective
Ensure proper oil mist concentration and supply.
Check the feed speed and air pressure parameters
and the type of blade you are using.
With a new blade it is necessary to start cutting at
half feeding speed. After the wearing--in period (a
cutting surface of about 300 cm
and about 1000 cm
and feed speeds can be brought up to normal values
Cutting chips wedge into the bottom of the teeth
causing excessive pressure on the teeth.
Use saw blade with coarser teeth
The surface of the cut may have undergone work hardening.
A tooth from the old blade may be left in the cut.
Inspect workpiece before cutting.
Any movement of the work piece during cutting can
cause broken teeth.
Check workpiece support on fence and table, Check
workpiece clamping.
Check compressed air supply
Blade teeth scratch over the material without
removing material
Increase up-stroke speed.
Cutting pressure too high.
Reduce up-stroke speed.
Check the coolant level and clean coolant lines and
nozzles.
Ensure proper oil mist concentration and supply.
The materials may present altered zones either on
the surface, such as oxides or sand, or included, such
as under-cooled inclusions. These zones, which are
much harder than the blade, cause the teeth to
wear quickly or to break.
Discard or clean these materials.
Table 1
14
Correction *
2
for hard materials
2
for soft materials) the cutting