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How to do multiple stepdowns when roughing bottom radius

kgueorguiev
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How to do multiple stepdowns when roughing bottom radius

kgueorguiev
Advocate
Advocate

In the program I have attached, I want to rough out the top part of the groove with my 4-flute .125 flat end mill, and then rough out the bottom radius with the 4-flute .125 ball mill. The flat mill roughing works fine, because I can use the "rough pass Z increment" option to enable stepdowns in Z. But there is no such option in the Draft Radius operation, so FeatureCAM wants to machine the whole depth in one pass with the ball mill. What is the simplest way to rough out the bottom radius in two Z stepdowns, after roughing out the upper walls? 

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TomOliver
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Solución aceptada

First off,  I think you are better off using a groove feature. Side features what to rough and finish, and since your groove is .125 and you are using a .125 tool there really isn't any rough on the side. A groove feature is designed for the tool size to be the same as the groove as you are trying to do. 


Secondly to accomplish the rough/ finish z increments you want. I would make a groove feature using a .125 flat end mill with a depth of .1365. This is your rough feature. you can select the z increment you want. 

Then copy that feature. Change the tool to your radius tool and make the depth .199.  Make your z increment .168. Go you the misc tab and uncheck equal depth of cut. This way the tool will go z-.168 and then z-.199 on the second cut.

 

I know it sounds complicated but I don't think it really takes that long.  

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Inventor Professional
Autocad LT
FeatureCam Ultimate
Fusion 360

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