topic Variable pitch thread in Fusion Design, Validate & Document Forum

Variable pitch thread

charlieuk — Fri, 08 Dec 2017 13:00:46 GMT

Im trying to draw a screw with a thread that goes from a course to a fine pitch similar to the picture below

Does anyone know how this would be done in fusion?

Many thanks

charlieuk — Sat, 09 Dec 2017 14:50:37 GMT

does any one have any ideas or is it beyond the powers of standard fusion and need some special programing/app?

innovatenate — Mon, 11 Dec 2017 23:46:28 GMT

You can use the import spline csv add-in to achieve a variable pitch coil in a design.

Using the equations for a coil. You can create a spreadsheet that quickly calculates the XYZ locations of a variable pitch coil/helix.

Copy and Paste the results into a CSV.

Then in Fusion 360, use the ImportSplinesCSV add-in to create the variable pitched helix from the CSV file.

Here's a screencast showing a helical helix using a similar methodology.

See the attachments for samples and further details.

I hope that helps.