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OT: Any woodworkers here?
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Cerebus:

--- Quote from: CatalinaWOW on December 03, 2020, 06:35:51 pm ---Something that goes through aluminum/steel laughs at end grain.

--- End quote ---

However, you will likely still have the same problems with tear-out as you would have with a plane. This is a consequence of wood being an anisotropic material. The solution for a mill would be the same as with a plane, make sure that the edges are supported by being clamped with some sacrificial scrap.

It occurs to me that a fly cutter is probably the best tool for the job, and that's something one can often get away with using on wood in a drill press. The cutting forces on a single point tool like a fly cutter are relatively low compared to an end mill or face mill. I'd still be concerned about tear-out but that can be ameliorated as above. If one had a drill press to try this on, the next question would be "Do I have enough space over the bed to swing a fly cutter far enough to be useful?".
tautech:

--- Quote from: Cerebus on December 03, 2020, 08:10:11 pm ---
--- Quote from: CatalinaWOW on December 03, 2020, 06:35:51 pm ---Something that goes through aluminum/steel laughs at end grain.

--- End quote ---

However, you will likely still have the same problems with tear-out as you would have with a plane. This is a consequence of wood being an anisotropic material. The solution for a mill would be the same as with a plane, make sure that the edges are supported by being clamped with some sacrificial scrap.

It occurs to me that a fly cutter is probably the best tool for the job, and that's something one can often get away with using on wood in a drill press. The cutting forces on a single point tool like a fly cutter are relatively low compared to an end mill or face mill. I'd still be concerned about tear-out but that can be ameliorated as above. If one had a drill press to try this on, the next question would be "Do I have enough space over the bed to swing a fly cutter far enough to be useful?".

--- End quote ---
Surface finish is relative to tool tip speed and feed rate. Period.
An experienced operator could get a perfect finish on this board with a mill.
CatalinaWOW:
I agree, tear out at the edges could be a problem.  But either sacrificial material at the edges as you suggest or a well chosen tool path will eliminate the issue.
Cerebus:

--- Quote from: tautech on December 03, 2020, 08:42:12 pm ---
--- Quote from: Cerebus on December 03, 2020, 08:10:11 pm ---
--- Quote from: CatalinaWOW on December 03, 2020, 06:35:51 pm ---Something that goes through aluminum/steel laughs at end grain.

--- End quote ---

However, you will likely still have the same problems with tear-out as you would have with a plane. This is a consequence of wood being an anisotropic material. The solution for a mill would be the same as with a plane, make sure that the edges are supported by being clamped with some sacrificial scrap.

It occurs to me that a fly cutter is probably the best tool for the job, and that's something one can often get away with using on wood in a drill press. The cutting forces on a single point tool like a fly cutter are relatively low compared to an end mill or face mill. I'd still be concerned about tear-out but that can be ameliorated as above. If one had a drill press to try this on, the next question would be "Do I have enough space over the bed to swing a fly cutter far enough to be useful?".

--- End quote ---
Surface finish is relative to tool tip speed and feed rate. Period.
An experienced operator could get a perfect finish on this board with a mill.

--- End quote ---

Tear-out in this context has nothing to do with surface finish but with the chunks breaking off the edges.
langwadt:

--- Quote from: CatalinaWOW on December 03, 2020, 08:51:16 pm ---I agree, tear out at the edges could be a problem.  But either sacrificial material at the edges as you suggest or a well chosen tool path will eliminate the issue.

--- End quote ---

yep going around the edge so the cutting is always inwards also works on metal to avoid making burr
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