Does the thread tool generate correct threads (pitch diameter)?
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Hi all,
After doing some experiments with defining my own custom threads for use with the built-in thread tool, I've run into an issue with the pitch diameter always coming out wrong. I can not get the thread tool to actively use the <PitchDia> tag in my custom thread XML file. It seems like it really doesn't matter what diameter I define - it will always turn out as the same (incorrect) diameter anyway. I checked the built-in thread XML files, and it seems they behave the same way - i.e. the pitch diameter is not correct, when the thread is modeled by the thread tool.
The following is a snippet of the XML file defining the standard metric threads in Fusion 360 (2.0.3803). The snippet defines the external M10x1.5 thread:
<ThreadDesignation>M10x1.5</ThreadDesignation> <CTD>M10x1.5</CTD> <Pitch>1.5</Pitch> <Thread> <Gender>external</Gender> <Class>6g</Class> <MajorDia>9.85</MajorDia> <PitchDia>8.928</PitchDia> <MinorDia>8.141</MinorDia> </Thread>
When I use the thread tool to model this thread and afterwards use a sketch to check the dimensions of the thread, I get this:
Hopefully, you'll be able to read what the dimensions in the sketch says, but if not the minor and major pitches are matching the values in the XML file, whereas the pitch diameter do not. It reads 8.876 instead of 8.928.
Has anyone been working with custom threads and using the tool to model the thread (and not just visualize it)?
Best regards
Jesper
Greetings from Denmark! 🙂