Maintenance; Troubleshoothing - KNOVA KN SCM-07A Manual

MAINTENANCE

WARNING
: Turn off the machine and disconnect
from the power supply before conducting maintenance
work or settings.
CHANGE THE SAW BLADE
• Raise the head of the band saw to the vertical position,
use the head locking pin to hold it in place, then
remove the wheel access cover.
• Loosen the tension knob and slip the blade off
of the wheels.
• Install the new blade through both blade guide
bearings and around the bottom wheel
• Hold the blade around the bottom wheel with one
hand and slip it around the top wheel with the other hand,
keeping the blade between the blade guide bearings.
• Tighten the tension knob so the blade will not slip
on the wheels upon start up.

TROUBLESHOOTHING

PROBLEM
The motor does • Defective motor, power cable or plug
not work
• Safety cover is open, interlock
Machine stalls or • Wrong blade for the workpiece
is underpowered.
• Feed rate too fast for task.
• V-belt slipping.
Machine has • V-belt is slapping belt cover
vibration or noisy
• V-belt worn or loose
operation.
• Pulley is loose
Teeth are ripping • The feed pressure is too heavy and
from the blade.
• The workpiece is vibrating in the vise.
• The blade gullets are loading up with chips.
Inaccurate cut • Excessive cutting pressure
squaring
• Incorrect blade tooth in relation
• Incorrect adjustment of the sliding blade guide
• Incorrect cutting speed in relation to work piece
• The workpiece is wrongly positioned in the vice
• Poor blade tension.
The blade tends • Excessive blade tension
to protrude from
• Incorrect eccentric blade guide adjustment
the guide
• The blade slips on the pulleys, caused by
CAUSE
switch not work
material (metal).
the blade speed is too slow; or the blade
TPI is too coarse for the workpiece.
to the workpiece
oil or grease required for cutting operations
MACHINE CARE
• Usually check the condition of the power supply cords
and replace them if they are broken, or even worse if
the internal wires are shown.
• Use a brush and a shop vacuum to remove chips
and other debris from the machine.
• Always keep the machine handgrip clean to prevent
accidental slipping during use.
• Remove the processing residues from the cutting
area and the blade guides whenever necessary.
• If you do not intend to use the sawing machine for
a long time, clean it and put it in a dry place if possible.
In these cases it is advisable to slacken off the blade
so that it is not kept for any reason.
• To ensure effective machine operation, check
the condition of the blade daily and sharpen
it whenever necessary.
• Specialized personnel should
check the machine
• Close the safety cover
• Use blade with correct properties
for your type of cutting.
• Decrease feed rate.
• Replace bad v-belt and re-tension.
• Inspect belt cover for proper installation.
• Inspect/replace belt with a new one.
• Realign/replace shaft, pulley, sets crew,
and key as required.
• decrease the feed pressure or
chose proper blade
• Re-clamp the workpiece in the vise,
and use a jig if required.
• Use a coarser-tooth blade
• Decrease cutting pressure
• Chose proper blade for workpiece
• Check blade guide adjustment
• Adjust to correct cutting speed
• Check workpiece positioning
and clamping in the vice
• Check blade tension
• Check blade tension
• Check eccentric blade guide adjustment
• Never use any type of lubricant or coolant
for the cutting operations; specialized
personnel should check and replace
the pulleys, if necessary,
8
SOLUTION