shazam/TPP

another morph between 2 curves problem

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mastercam 2017, just trying to finish a tapered boss on an od and figured morph between 2 curves would give me a smooth toolpath.

my two curves are in dark blue and the surfaces are tan. i am using 3 axes with all geometry in the top view. my toopaths do not stay between

the curve and am getting frustrated. any help would be appreciated. tia

TEST.mcam

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Trim the larger surface to the outer curve (I used "split model" to keep all surfaces).  Then, make sure the only surfaces selected are between the two curves.

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Morph between 2 curves is a awesome toolpath, but also dumb to some extent. The chains are like suggestions to the toolpath to cut the toolpath with, but not limit. You can take 2 lines and use them and it will cut the surface you select for cut using them as suggestions to cut the toolpath with them. Trim the surface like John suggested or use the HST Finishing toolpaths as they will respect the boundary and not cut outside of the shape.

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Dave, i could not download your file (it says it doesn't exist), but i did a combination of what you and John recommended and toolpath looks great!! thank you.

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 or use the HST Finishing toolpaths as they will respect the boundary and not cut outside of the shape.

 

Ron, i did try the HST toolpath and used spiral, waterline, scallop and contour. the toolpath was just too choppy and would've left a bad surface finish. thank you

though, i always heed your words!!

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Ron, i did try the HST toolpath and used spiral, waterline, scallop and contour. the toolpath was just too choppy and would've left a bad surface finish. thank you

though, i always heed your words!!

 

Well take it for what it is worth I would have approached it the same way you did. :scooter: :scooter:

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