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General Mach Discussion / Re: Problems threading on the lathe
« on: October 15, 2009, 06:03:57 PM »
Very interesting Rich, from that it would seem that you have some issue with either the computer or index pulse or something that I don't have. Granted I never did all the passes you are doing, if you post the code you are using I can give it a shot tomorrow and see what my results are using the exact same method.
I dont have the means of optical measuring that you have but if each pitch is off by the amount you are saying it will add up to a lot over the 200mm I will do so I can easily detect.
With my last test to confirm I measured with digi cals, mic and also zeroed the Z axis in the root of the first thread and moved it by MDI to Z -190mm and then wound in the X and again it was exactly in the root so I have to conclude it was spot on.
Hood
I dont have the means of optical measuring that you have but if each pitch is off by the amount you are saying it will add up to a lot over the 200mm I will do so I can easily detect.
With my last test to confirm I measured with digi cals, mic and also zeroed the Z axis in the root of the first thread and moved it by MDI to Z -190mm and then wound in the X and again it was exactly in the root so I have to conclude it was spot on.
Hood