Reindexing thread

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13 Mar 2017 14:58 #89525 by emcPT
Reindexing thread was created by emcPT
Note sure if possible, but I would like to know if I can reindex a thread to open it deeper.

Let me explain it better: A thread was opened and I needed to remove the part from the lathe. Figured out that I need to make the thread deeper. How can I clamp it again and still open the thread on the same spot? I understand that I can do this by switching the Z axis, but how can I check when the threading tool is on the thread track?

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13 Mar 2017 18:10 #89537 by emcPT
Replied by emcPT on topic Reindexing thread
Issue solved.
Made another part(s). Too much trouble in setting the tool.

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14 Mar 2017 16:21 #89593 by andypugh
Replied by andypugh on topic Reindexing thread
I have done this in the past. Here is how.

Set up the G76 as before, with the same parameters and let it run in air.
On the spring-pass stop the spindle (override to zero)
Put the work loosely back in the chuck and rotate it in until the threading tool engages properly.
Then you can press "stop" and change the G76 parameters to re-cut the thread.
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