Surface Care
Nicks, dings, and scratches on the surface of the rotary table and base can have an adverse effect on accuracy and may damage the workpiece or mill table.
Prior to use, dress or "stoning" these surfaces with a fine sharpening stone. A few strokes of the stone on the table surface, the machined base and back, and the mill table will help to ensure longevity and accuracy. Make sure to thoroughly wipe these surfaces clean to remove any dust generated from the process.
Preload
A precision spacer is installed under the keeper on the back of the rotary table to maintain the proper amount of preload. With use, the spacer surface that the keeper rubs against may become worn.
You can test the preload by mounting the rotary table horizontally on the mill table, positioning the tip of a test indicator on the surface of the rotary table, then attempting to lift the table up from the base. The table is properly preloaded when no motion is measured. If motion is detected by the test indicator, perform the procedure below to cor- rect the amount of preload.
Tools Needed | Qty |
Hex Wrench 5mm | 1 |
Fine Sharpening Stone | 1 |
To correct the amount of preload: |
|
1.Turn the rotary table horizontally upside down on a protected surface.
2.Remove the three cap screws shown in Figure 21 that secure the keeper.
Keeper
Figure 21. Keeper and cap screws.
3.Remove the keeper and the spacer (see
Figure 22).
Keeper
(Shown Upside
Down)
Spacer
Figure 22. Keeper and spacer removed from the
rotary table.
4.Stone the spacer as instructed in the previ- ous Surface Care subsection on this page.
5.Thoroughly clean all of the mating surfaces, then apply a thin coat of light machine oil to all parts.
6.Re-assembly the parts and test the preload again. If necessary, repeat this procedure until you have attained the proper amount of preload.
G9298/G9299/G9300 Rotary Table |