Lead-In Positions -- Problems and Workarounds and Explanations

Lead-In Positions -- Problems and Workarounds and Explanations

jeffhammond
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Lead-In Positions -- Problems and Workarounds and Explanations

jeffhammond
Enthusiast
Enthusiast

Maybe something I say in this video clicks with the devs and they'll give the Lead-In position capabilities in Fusion CAM some more love


that aside, maybe some users have encountered similar issues as I and they can use some of the ideas/'hidden' capabilities I've found and incorporate them into their own workflow.. idk

 

(view in My Videos)

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seth.madore
Community Manager
Community Manager

You've got a lot of stuff there to unpack, but I wanted to touch on the very last bit; tool with less flute than stock/part thickness. I notice that you don't have any collisions showing up in the timeline, but you really should see them. I did a quick test file to see if I could replicate your results, but was unsuccessful:

2025-12-15_09h16_12.png

Can you share a sample Fusion file that doesn't show a collision, but should?

File > Export > Save to local folder, return to thread and attach the .f3d file in your reply


Seth Madore
Customer Advocacy Manager - Manufacturing


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jeffhammond
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Enthusiast

no, I don't have an example of that and to me, Fusion is reliable with detecting collisions that may occur.

I get it how the video isn't as clear as it should be but everything up until the 10 minute mark, the lead-in positions are always in the same exact spot so no collisions are detected and the cuts are fine.

at the 10 minute mark is when I regenerate all the tool paths except the final pass lead in position has been changed slightly so it no longer coincides with the previous two.


it is then you can see the popup show 1 error detected.. and this error is very quick and at the very end of the timeline. it's because the tool is now exiting at a point that hasn't been cleared out by the roughing tool path since the lead-in points are no longer the same

----

but to be clear,  I'm not asking anything of Autodesk at this point.. the way I'm doing it now with the script in rhino and the ability to use points as a selection set in Fusion is perfectly adequate for me and is saving me tons of time compared to how I used to do it. I guess this post is meant to bring awareness to the importance being able to control lead-in/lead-out positions when using vacuum spoilboard hold downs on sheet goods.

 

Fusion is awesome for doing this stuff, especially compared to Vetric VCarve (imo) but for whatever reasons, VCarve seems to be the go-to that many of the manufacturers are pushing these days. They seem to focus on exactly wood/sheet goods whereas Fusion seems to talk more about or geared towards metal machining.. which is fine.. but still, it works great for 5x10 3axis machines as well.

 

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