Hi,
I'm trying to find a workflow to model custom parametric thread. My goal is this:
Below is my approach at the moment. All goes as planned until I want to fillet, the sweep is segmented and fillet seems to fail because of these segments (I had to upload all steps in one image because the upload limit is 3?).
I also attached my f3d
So, does anyone have a suggestion on an alternative workflow for my goal?
Thanks!
The effect of segmentation you're seeing is caused by the guide surface.
When you use a guide surface, the sweep command forces the geometry to stay parallel to the guide surface, which results in a segmentaed not-smooth path to get the shape you're after.
This also happens in other applications like architecture when trying to create a helix ramp for example, and I always solve it by using a script that merges edges together to get smooth rails to loft and guide the geometry by these loft rails, but the catch is that it's not parametric.
Saeed Hamza
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Here's something I came up with a few years ago. It uses a plane at the helix angle then a sweep with twist to create the thread, doesn't use coil at all. See attached file.
Just use the three favorite parameters to drive the thread and edit the ThreadForm sketch to the thread you need. The form is at the helix angle not parallel to the axis but this should not be a problem for small threads. Not even sure it's a problem, although threads are drawn parallel to the axis thread, cutting tips are held at an angle and can cut several pitches with a standard holder and anvil.
Mark Hughes
Owner, Hughes Tooling
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