Troubleshooting; Blade And Cut Diagnosis - Promac SX-823DGSVI Manual

11 TROUBLESHOOTING

This chapter lists the probable faults and malfunctions that could occur while the machine is being used and
suggests possible remedies for solving them.

11.1 Blade and cut diagnosis

FAULT
TOOTH BREAKAGE
PROBABLE CAUSE
Too fast advance
Wrong cutting speed
Wrong tooth pitch
Chips sticking onto teeth and in the
gullets or material that gums
Defects on the material or material too
hard
Ineffective gripping of the part in the
vise
The blade gets stuck in the material
Starting cut on sharp or irregular
section bars
Poor quality blade
Previously broken tooth left in the cut
Cutting resumed on a groove made
previously
Vibrations
Wrong tooth pitch or shape
Insufficient lubricating, refrigerant, or
wrong emulsion
Teeth positioned in the direction
opposite the cutting direction
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REMEDY
Decrease advance, exerting less
cutting pressure. Adjust the braking
device.
Change speed and/or type of blade.
See chapter on "Material classification
and blade selection", in the section
Blade selection table according to
cutting and feed speed.
Choose a suitable blade. See Chapter
"Material classification and blade
selection".
Check for clogging of coolant drain
holes on the blade-guide blocks and
that flow is plentiful in order to facilitate
the removal of chips from the blade.
Material surfaces can be oxidized or
covered with impurities making them,
at the beginning of the cut, harder that
the blade itself, or have hardened
areas or inclusions inside the section
due to productive agents used such as
casting sand, welding wastes, etc.
Avoid cutting these materials or in a
situation a cut has to be made use
extreme care, cleaning and remove
any such impurities as quickly as
possible.
Check the gripping of the part.
Reduce feed and exert less cutting
pressure.
Pay more attention when you start
cutting.
Use a superior quality blade.
Accurately remove all the parts left in.
Make the cut elsewhere, turning the
part.
Check gripping of the part.
Replace blade with a more suitable
one. See "Material classification and
blade selection" in the Blade Types
section. Adjust blade guide pads.
Check level of liquid in the tank.
Increase the flow of lubricating
refrigerant, checking that the hole and
the liquid outlet pipe are not blocked.
Check the emulsion percentage.
Turn teeth to correct direction.