Re: [CAD_CAM_EDM_DRO] how do I calculate thread pitch or TPI?

In a message dated 19-Aug-02 23:14:25 Central Daylight Time, lloyd@...
writes:

> 12.7 TPI. is this correct?<<

Yes. You have the picture!

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> Also, what is pitch, and how do I calculate it from the TPI?<<

"Pitch" is the number of threads per inch. If a thread is "single start"
(only ONE thread on the rod), the "lead" is equal to pitch. The definition
of these words is confusing when you have "multi-start" screws. For example,
the 1/8" pitch ACME lead-screws on my plotter are "four-start". ONE turn
results in a linear move of 0.5 inch. (Four TIMES 1/8").

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