Kirk,
A friend of mine had the exact same problem with a brand new CNC lathe.
He traced it to a bad spindle encoder cable.
John
On 17 Oct 2007 at 1:00, [EMAIL PROTECTED] wrote:
> I went back to making threads
> without much success. Randomly, but close to every third or fourth pass
> comes out being about a half thread off.
> <snip>
> I assume that the spike in the spindle velocity data is due to a
> counter reset at the start of each pass?
>
> Any help with these would be appreciated.
>
> --
> Kirk Wallace (California, USA
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