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Tool starting from the bottom on Z-Level finishing

kgueorguiev
Advocate

Tool starting from the bottom on Z-Level finishing

kgueorguiev
Advocate
Advocate

In the file I have posted, I want to utilize the Z-Level finishing strategy with a .031 ball end mill to machine the four deep slots on the feature "Core Pin Cavities". On most of the slots, the tool starts cutting from the top and works its way down, which is what I want. However, on some slots it plunges down into the slot first, before retracting back up and starting to machine from the top again. 

 

This is what the toolpath looks like. First plunges to the bottom, then starts cutting normally at the top edge.

Toolpath plunge first.png

 

On 3D simulation it looks like this:

 

Tool Gouging on Plunge.png

 

Why is it not starting from the top down every single slot? 

 

If this continues to not work properly, I intend to try a different 3D strategy other than Z-Level. What would be a good alternative strategy to machine these?

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ChristopherMarion
Advisor
Advisor
Solución aceptada

Hi @kgueorguiev 

 

I think the porblem is not with the selected surf mill operation, but with one of the options that is turned on.

 

Take a look at this image.....  Even though the option for Interleave Spiral Paths appears to be off, it looks like it is still on which would cause your issue.

 

2021-08-30_09-26-18.png

 

To get around this, just create a new process (Z level) to unset everything.  Then apply the boundaries and step downs and everything else you were using.  I did this quickly on your part and it behaved how you'd expect it to.  I wouldn't change to a different strategy since I would have selected Z level as well.

 

FeatureCAM just looks to be holding onto that option and will not release it for whatever reason.  Just create a new one to move past it.

 

Hope this helps.

 

Christopher Marion
Technical Specialist - CAM
SolidCAD - Canada





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kgueorguiev
Advocate
Advocate

Thanks Chris, I knew you'd have my back. Starting a new Z-Level finish without Interleave does solve the problem. For some reason, when "Remachining" is checked, Interleave Spiral Paths becomes greyed out and can no longer be checked or unchecked. I assumed this meant that FeatureCam cannot use Interleave when Remachining so I didn't think this could have been the cause of the issue, but apparently Interleave was still being applied even though it was greyed out. Seems like a bug.

ChristopherMarion
Advisor
Advisor

Hi @kgueorguiev 

 

I've seen similar things in the past.  Maybe a small bug, but not 100% sure on that.

 

Anyway, always glad to help out when I can.  Have a good one!

 

Christopher Marion
Technical Specialist - CAM
SolidCAD - Canada





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