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| taper problem. |
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| wheeltapper:
Hopefuldave; I didn't measure the bulge but when I cut at the back and got an iwards curve it was about 3 thou in 2.5 ins. the outer bulge did seem to be more than that tho. Roy |
| flutedchamber:
Wheeltapper, Is it possible that there isn't enough relief under the cutting edge of your toolbit? That would allow the bit to bite in the beginning of the cut until the material being cut pushes the toolbit back just a bit. The same basic thing happens at the end of the cut, causing a barrel shape. Are the spindle bearings good, with no detectable movement? |
| philf:
My guess is that the topside isn't running parallel with the headstock axis in the vertical plane. If this is the case the tool will only be exactly at centre height at one point. This could account for a wasp waisted part. Firstly, I would clock the top of the cross slide to make sure it is parallel to the bed. If that's OK then clock the bed from the topslide (by moving the topslide and not the saddle). Hope this helps. Phil. |
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