Rapid Collision with stock at end of lathe internal threading

[Smokeys]

At the end of each thread cut, I get a rapid collision with stock.    I am not quite sure where it's happening and there are not a lot of options for lathe threading so I am not sure what I can change.  

[HughesTooling]

Can't help at the moment but is your thread depth correct? It looks twice as deep as it should be, depth is per side. Have noticed the radii tab has changed, the retract options missing not sure if that's correct. 

Mark

[Smokeys]

The thread depth is correct,  (even when I changed to almost nothing I still get the collision).

It's the first retract move that gets the collision.  The threads all cut just fine.   I suspect it's nothing, but then I've learned to pay attention to everything Fusion tells me as it's more often correct.

[DWhiteley]

I see this exact problem on the Fusion tutorial (Turning_Hex_Cap). "Turning - Live Tooling, OD, ID and Sub-Spindle" on the last internal thread (2nd spindle).

The collision is showing in the simulation.

Come on Autodesk, sort it out!

Dave

[akash.kamoolkar]

Hey guys,

Just to update you, we are aware of this issue of a false collision in simulation during the threading retract move and we are looking into resolving it.

Regards,

Akash Kamoolkar

[DWhiteley]

Thanks for letting us know Akash.

But why has 'Smokeys' had to wait since July last year for an answer?

[akash.kamoolkar]

@DWhiteley 

As the Turning Product Owner for Fusion 360 I make it a point to respond personally to each and every turning-related forum post. In fact I have responded to at least 3 questions about false collisions in threading that were posted since this one. I am not sure how or why this one fell through the cracks.

Regards,

Akash Kamoolkar

[ivan_rados]

Hi all,

I have this part from the tutorial, which I am not able to make the thread turning operation without a collision at the end, I have tried many different options and parameters. Can someone look at it and tell me if this is the error or I am missing something. It is a OD thread and the part is attached.

best regards,

Ivan

[seth.madore]

As @akash.kamoolkar mentioned a few posts above yours, this is a known issue. It affects simulation only, not the code.

[ivan_rados]

I understand, just wanted to know if I am setting something wrong.

It is because I took the part and defined the machining operations from scratch and could get it done the right way and then I came across the tutorial, the same part, available direct from Fusion Data Panel -> CAM Samples -> Tutorials folder -> Tutorial6 , where there is no collision in the turning thread operation although it is in some others.

That is why I  asked for help here.

[seth.madore]

No, regarding the threading, you did it correctly. It's just a bug that's crept in.

If you copy/paste the toolpath from the Tutorial and re-select your diameter to thread, you will see that the collision now occurs.

[ivan_rados]

Ok, yea copying results in the same, thank you for the lookup and hope this will soon be corrected.

best regards,

Ivan

[Aadithya01]

@boopathi.sivakumar FYKI

Hi @akash.kamoolkar ,

Is the false collision simulation issue resolved ?? Cause I still see a rapid collision issue with the internal threading operation (I have attached the fusion file for your reference). 

Kindly looking forward for your reply. 

Regards

Aadithya

[matthewM5R6M]

I can confirm this false collision issue is still not resolved.  I'm getting it on the retract on the most recent part i'm doing!