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Hukshawn
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When a company makes a lathe for both the metric and the imperial markets, it is set up with different labeling, gearing, lead screw, and threading dial. Do you have a manual for the lathe? If so, check that all the tooth counts are correct. Sometimes a mistake is made at the factory and both metric and imperial components are mixed during assembly. QC would normally catch that, but QC is sometimes poor or nonexistent, and sometimes mistakes are made. I would also carefully check the last gear in the gear train that drives the quick change box. That is a compound gear. Make sure both tooth counts on that gear are correct. Also, you made that one thread that looks pretty good. Could you check that thread with a thread gage or a ruler to see if it is the correct pitch to match the machine setup used when it was cut?
Good idea... I will check the thread pitch tonight.
No manual. and very difficult to find info on the internet. not much out there.
I am cautiously optimistic the gear on the thread dial is wrong. it would explain why my threads are consistent, just consistently wrong...
However... if the gear were wrong, wouldn't that cause the half nut to not line up with the thread dial at all? as it stands, I can engage perfectly on number 2 & 4. no where else... everywhere else the half nut hits the top of the threads and engages just past the line or out in left field. IF the dial gear was wrong, wouldn't there be no consistency with 2 & 4 at all? shouldn't it just be all over the place??