Craftex CX904, Руководство пользователя

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14
OPERATION
In this section of the manual, we are
providing
you with the basic
understanding of the grinding operation
on this machine.
Warning!
Always wear safety glasses or a face
shield and respirator when operating the
machine. Failure to do so can result in
serious damage or injury to your eyes
and lungs.
To Operate CX904
Check the work-piece and make sure it
is suitable for grinding and select the
correct grinding wheel for the work-piece
you want to grind.
Adjust the tool rest so that it is
perpendicular to the grinding wheel and
the gap is 1/16" - 1/8"
Adjust the spark deflector so that the
gap is 1/8" - 1/4".
Make sure eye shields are in position.
Wear safety goggles or face shield and
a respirator and stand to the side of the
grinding wheel.
Connect the cord to the power source
and turn the switch to ON position.
Allow the grinding wheel to reach its full
speed and gently feed the workpiece
into the grinding wheel.
Keep the workpiece moving across the
face of the grinding wheel. Grinding
continuously on the same spot on the
wheel will cause grooves to be worn into
the wheel. The wheel may crack or
become damaged more easily and
grinding of the other objects will be
difficult.
If the workpiece becomes hot, dip it into
the water or oil to cool it preventing
surface hardening or temper loss.
If the surface of the grinding wheel is no
longer square, the wheel should be
reshaped using a wheel dressing tool or
replaced.
GRINDING WHEEL INSPECTION
The CX904 comes with an aluminum
oxide grinding wheel. The grinding
wheel should be inspected properly
before installation.
Clean the dust and/or dirt from the
surface of the wheel and inspect it for
any cracks, dents, chips, or any kind of
external damage.
To inspect the wheel for any internal
damages:
Inspect the grinding wheel and make
sure it passes the "ring-test".
Hold the wheel up with a finger through
the hole located in the middle of the
wheel and tap it using a wooden mallet
or a light non-metallic object as shown in
figure 10.
Wheels should be tapped gently with a
light wood or non-metallic instrument. A
stable grinding wheel will give a clear
metallic tone or "ring."
That distinctive ring comes from the
hardness of the material in the wheel
and its ability to transmit sound
vibrations. If the wheel is cracked, the
vibrations stop at the crack and there is
no ring. However, a ring test may not
detect all defects in a wheel, so a