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Cut my first thread

Been busy at the shop, not much time to learn the new machine.

The Hyundai is alive and running, cut my first part, turned a diameter and put on a 1/2-13 thread.

Still some work to be done figuring out the L95 turning cycle (siemens)

My finish cut is programmed to cut longitudinal right to left (-Z) but it cuts left to right??

And I have to fudge the thread length, the tool is set with the tool pre setter, point in X and the left edge in Z. So I had to add 1/16" or 1/2 the insert thickness to the thread length for the thread to go full length into my relief cut.

Thank You, Randy

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Reply to
Randy
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My first thread at aged 15 years old (1968) running a Hendy belt drive using collets and centre in the end of the part, a 3/4 UNF thread.

Manual engaging the lead, on the same mark every time to be cautious. All going singingly well, approx 90% depth cut and looking a treat. Instructor disappeared for a cup of tea or piss, me getting real cocky and backing off centre by sliding tailstock back to try a nut after every cut. Almost there,

99%, then unbeknown to me, recentering the centre must have punched the part dead on 1/2 pitch into the collet. Final cut all the thread crests removed in one foul move :-) hey presto my first 2 start thread.
Reply to
Lez Pawl

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