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Rapid Collision with stock at end of lathe internal threading

13 REPLIES 13
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Message 1 of 14
Smokeys
825 Views, 13 Replies

Rapid Collision with stock at end of lathe internal threading

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.  

 

13 REPLIES 13
Message 2 of 14
HughesTooling
in reply to: Smokeys

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. 

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Mark

Mark Hughes
Owner, Hughes Tooling
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Message 3 of 14
Smokeys
in reply to: HughesTooling

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.

Message 4 of 14
DWhiteley
in reply to: Smokeys

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

 

Message 5 of 14
akash.kamoolkar
in reply to: DWhiteley

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



Akash Kamoolkar
Software Development Manager
Message 6 of 14
DWhiteley
in reply to: akash.kamoolkar

Thanks for letting us know Akash.

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

Message 7 of 14
akash.kamoolkar
in reply to: DWhiteley

@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



Akash Kamoolkar
Software Development Manager
Message 8 of 14

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

Message 9 of 14
seth.madore
in reply to: ivan_rados

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


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 10 of 14
ivan_rados
in reply to: seth.madore

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.

Message 11 of 14
seth.madore
in reply to: ivan_rados

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.


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 12 of 14
ivan_rados
in reply to: seth.madore

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

 

best regards,

Ivan

Message 13 of 14

@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

Message 14 of 14
matthewM5R6M
in reply to: Aadithya01

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!

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