Southbend SB1023 - Manual (Page 27)

For Machines Mfg. Since 8/09 Model SB1023
-25-
O P E R A T I O N
This test will give you an indication of any
internal damage that may not be obvious during
a visual inspection.
To perform a ring test:
1. Make sure the wheel that you test is clean
and dry; otherwise, you may get false
results.
2. Hang the wheel in the air with a piece of
cord or string looped through the hole in the
center, as shown in Figure 30.
3. At the locations shown in Figure 30, gently
tap the wheel with a light non-metallic
device such as the handle of a screwdriver or
a wooden mallet.
An undamaged wheel will emit a clear
metallic ring or “ping” sound in each of these
spots. A damaged wheel will respond with
a dull thud that has no clear tone. If you
determine from the ring test that the wheel
is damaged, DO NOT use it!
Figure 30. Ring test setup and test locations.
Paper Washer
Ring Test Wheel Dressing
Figure 31. Safe tool positioning for wheel dressing.
YES
NO
Rotation
Grinding
Wheel
Dressing
Tool
Magnetic Chuck
Superior grinding results can only be achieved
with a properly balanced and dressed wheel. Do
not assume that a wheel will run true on the
spindle if it is new or has not been separated
from the hub.
Dressing the wheel correctly will save you from
wasting grinding abrasive and shattering the
dressing tool diamond. Additionally, with a
properly balanced and dressed wheel you can
rest assured that if you have finish problems, the
grinding wheel is not the culprit.
Depending on the finish required, varying
degrees of roughness can be obtained. For
example: A fast dressing at a depth of 0.03mm
will prepare a wheel surface for rough cuts, and
slow dressing with multiple light passes of the
diamond at a depth of 0.01mm will prepare the
same wheel for finish cuts.
Positioning is critical for the dressing tool so
you will not shatter the diamond or have poor
dressing results. The dressing tool must be
positioned in the trailing zone of the wheel, as
shown in Figure 31, for best results and safe
use. If the tool is positioned on the leading side
of the wheel, the diamond will be shattered or
even grabbed by the wheel and drawn under the
grinding wheel, causing severe damage or injury.