Surface High Speed Problem

[Mic6]

Hey Everybody, so my part looks like a picture frame with a slight radius on the face. I'm using surface high speed, core roughing, and no matter what parameter I check/uncheck, I cant stop the tool from pocketing out the center window. I tried making containment at Z0 just inside the center window, I tried area clearance but I can't keep the tool from trying to pocket the center area. Keep in mind the center window will come out, just not yet, I have screws in there holding the part down. I just want to rough the radius. Any idea how to keep the tool out of the center? TIA!

[Mark H]

Put in a (check) surface high above the part and use Z depths.

[Mic6]

Thanks for replying there Mark, but could you elaborate a little? Should the surface I create be inside the window dimensions and how would I apply z-depths? This is my first time using Surface High Speed. Thanks again

[Ocean Lacky™]

I'd model the stock, save it as an STL and use High Speed Rest Roughing

[Mark H]

Just draw in a surface where you dont want the cutter to go. Then in the cut parameter - steep/shallow page select the Z depths you want to use. And make user your surface is above the minimun Z depth value.

[Tony35]

i use 2 containment boundaries

 

HTH

[Roger Peterson]

HST core rough doesn't support check surfaces. but it does support nested containment boundaries. Since a single containment boundary will keep the tool inside it, use nested boundaries to stay inside the outer boundary but outside of the nested boundary. you may want to create some cylinders that represent your bolt heads and add them as drive surfaces to ensure the cutter doesn't hit them.

 

 

HTH

[Rob Peirolo CNC Software]

You didn't say if you were using the 2D or 3D HST toolpaths. If you are using the 3D HST Core Rough, did you try setting the "Skip pockets smaller than" to the size of the center window?