Grooving toolpath, what am I doing wrong

[tomae]

I can't figure out why the grooving toolpath in this model won't work.  I have an identical part where this toolpath works fine.  Not sure what I am missing...?

The only thing different here compared with my other part is the stock here is from a solid, where my other part the stock is a fixed cylinder.  But I tried to change this one to a fixed cylinder and have the same issue.  The grooving toolpath gives Error: Invalid contour.

-Tom

[akash.kamoolkar]

@tomae I have managed to replicate this problem and created a ticket. In the meantime a workaround might be to increase the Z stock limit just a slight bit so it's outside the groove.

Regards,

Akash Kamoolkar

[tomae]

Thanks Akash.  Not sure what you mean by "increase Z stock limit".  Are you talking about the Radii tab of the toolpath, or changing the stock in the Setup?

-Tom

[akash.kamoolkar]

@tomae Sorry I should've been more specific. I was referring to the back z limit in the geometry tab of the toolpath. if you move it a slight bit out of the groove towards the back it works.

Regards,

[tomae]

Akash,

Ok.  One other thing, when I simulate that toolpath I get an error that says "Error occured during stock calculation" and it simulates the path but doesnt cut the stock.  Is that part of the bug?

Thanks again,

-Tom

[akash.kamoolkar]

@tomae that might be an issue with in-process stock and unrelated to this bug. try turning IPS off.

Thanks,

[tomae]

IPS is *not* on so this isn't the problem...

[akash.kamoolkar]

@tomae I have asked the simulation team to look into your issue.

Regards,

[tomae]

Ok, thanks.  Attached is a screen capture of what I am seeing, though I suspect they can just use the model to see it as well....

-Tom

[brekmiller]

The stock-calculation error is because the tool's "Head length" is bigger than its "Overall length".

"Overall length" = 18.9 mm
"Head length" = 31 mm

Increase the "Overall length" so that it is bigger than the "Head length".  We have an open ticket for getting Fusion to prevent this from happening.

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[tomae]

Thanks Brek,

That does fix the stock error in simulation.  However, more generally... these 2 parameters are in the definition of the insert.  "Overall length" appears (to me) to be the length of the insert itself.  "Head length" appears (to me) to be the length of the head of the tool (holder+ insert).  In the case of my interpretation the numbers I entered are correct (my insert is ~19mm long and the head of the holder+insert is about 31mm).

If my interpretation is incorrect then there should be some text or something to define these values for the user.  A suggestion:  In the holder tab, these two values also appear and when I click on a field, like "Head length" or "Overall length", the diagram changes to show the dimension being referred to.  That same behavior would be useful in the insert tab as well especially if the meaning of "overall" and "head" is different between the two tabs!!

-Tom