topic Re: Threading Two Faces on One Part, Need to Follow the Same Lead in Fusion Manufacture Forum

Threading Two Faces on One Part, Need to Follow the Same Lead

westsidecnc2022 — Thu, 30 Jun 2022 12:32:26 GMT

I'm trying to thread multiple faces of the same part internally, and everything seems fine until I machine the part. My gauge wont screw in after catching the start of the thread, as if the two steps are not following the same lead. I'm basically brand new to CNC machining and Fusion 360, and have self taught up to this point so please forgive me if this is the wrong place.

Re: Threading Two Faces on One Part, Need to Follow the Same Lead

Don.Cyr — Thu, 30 Jun 2022 14:19:14 GMT

By the screenshot, it's hard to see the threaded section(s). Can you share a screenshot of the drawing and the Fusion file?

Re: Threading Two Faces on One Part, Need to Follow the Same Lead

westsidecnc2022 — Thu, 30 Jun 2022 17:24:56 GMT

https://a360.co/3OPgM1C -- I think this is a link to the file, again, green and learning as fast as I can teach myself.

The below image is the best I have regarding what the thread steps are. They are the two long steps following the shorter counter step of each section. I can hand draw you something a little more "readable" if it will help. I appreciate your help!

Re: Threading Two Faces on One Part, Need to Follow the Same Lead

Don.Cyr — Thu, 30 Jun 2022 18:53:29 GMT

Tried quickly to create the toolpath, it will most likely have to be written with a G32 threading cycle. I couldn't initially get Fusion to follow the path in 1 continuous move, it tries to break it up into multiple segments.. I wish I had more time to look, hopefully someone can chime in to offer better help.

Re: Threading Two Faces on One Part, Need to Follow the Same Lead

jswickJ9PWC — Thu, 30 Jun 2022 19:00:47 GMT

Most newer CNC laths start the threading cycle at the same C-axis rotation, so really all you have to to is program two separate threading cycles with the exact same starting Z-position and same RPM. You can only do this for straight threads though so if you are trying to thread that angle, you won't be able to. Also, older machines and cheaper machines start at arbitrary c-angles so it doesn't work on them either.