more or less stepover?

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mikep608
Posts: 22
Joined: Tue 25 Dec , 2012 8:38 am

more or less stepover?

Post by mikep608 » Wed 20 Mar , 2013 9:49 am

Here is a photo of something that I had bobcad make a code for. It has lines cut into it that aren't supposed to be there. I'm using a flat end mill. Should I use more or less stepover distance. The bit is 3/16.
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mikep608
Posts: 22
Joined: Tue 25 Dec , 2012 8:38 am

Re: more or less stepover?

Post by mikep608 » Wed 20 Mar , 2013 9:50 am

it's part of this
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Re: more or less stepover?

Post by Denford Admin » Wed 20 Mar , 2013 10:25 am

It's hard to see from the photo - I take it the shape is curved ?
That type of design would probably come out better with a ballnose cutter - a flat cutter will leave lines on curved surfaces as there is only a small part of the tool diameter in contact when machining a slope.
Increasing stepover would improve it but I'd try using a ballnose for the finishing (use a larger flat bottom cutter for roughing if required)

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