Weird behaviour on radius corners on groove finishing operation

[krisGPB83]

Hi,

I noticed that cycle does not include the full radius when doing the op.

Tool is grooving tool 2mm wide with R0.2 radius.

Front and Back on the geometry tab does include the radiuses (edges selected). Please see ss below

Lead in as image below:

But when I generate the cycle it does not include full rad thus does not generate nice 45deg lead-in:

This is the first tool/material contact point, is misses part of radius marked in red:

The only solution I found is to extend the geometry by 0.2mm then it is creating correct toolpath:

Any reason why fusion does not include full rads when they are included in geometry?

File with model attached.

[programming2C78B]

This is what you posted. Seems right to me

[krisGPB83]

Yes because front and back of the groove is offseted +0.2 and -0.2mm and they shouldn't - check the geometry tab on the operation.

[programming2C78B]

I believe it's because you have a 0.2mm rad on the tool, and the front/back selections work as a way to constrain the edge of the insert (not the cutting edge) into that "window".

For example, you can make it even wider and it will still just cut that one groove with its rads

[akash.kamoolkar · Accepted solution]

@krisGPB83 Unfortunately groove finishing does not have the capability to use the back stock limit as a "contact point" boundary which would finish the radii fully. However, you can use the profile finishing strategy with a grooving tool with tool limit set to "contact point" that will give you the result you want.

Regards,

[krisGPB83]

Well, not really as profile finishing cycle will try to do it in one pass. How can I split it in the middle of the groove and do a lead out?

[programming2C78B]

Whats wrong with just using the 0.2mm offset? the path does exactly what you're after. I explained "why" it doesn't cut it properly when constraining it to just the edges.

[akash.kamoolkar]

@krisGPB83 i've created a ticket to explore the possibility of adding a contact point tool limit to groove finishing.

Regards,

[krisGPB83]

I created this thread to understand the software behaviour and I do now so It's fine. Just when using different systems like EdgeCam when whole profile was selected with radiuses, tool was turning it complete. Here in fusion it work's differently and I couldn't understand why.

[krisGPB83]

Thanks