For Machines Mfg. Since 8/09 | O P E R A T I O N | Model SB1023 |
Ring Test
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.
Paper Washer
Figure 30. Ring test setup and test locations.
3.At the locations shown in Figure 30, gently tap the wheel with a light
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!
Wheel Dressing
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.
Grinding
Wheel
YES | NO |
|
Dressing | Rotation |
| |
Tool |
|
Magnetic Chuck |