I take scallop to mean that the package chooses a variable stepover to maintain a constant scallop height, giving a consistant surface roughness. It's always difficult to interpret CAM options across packages, but of those shown I think the relevant ones are scallop, spiral and radial. I'll give it a whirl and see what happens

Use some paraffin on the job particularly with the ballįigures are for my 5000rpm spindle so you can up the speed and feed keeping the same chipload. On the adaptive I would use a 6mm 3-flute cutter 10000rpm and 1000mm/min feed 6mm max stepdown, 0.5mm fine stepdown a s you are using a small 3mm cutter to follow up and the adaptive stepover of 0.6mm. I usually use a4 flute ball nose for this sort of work so I can feed faster Go with the full 10K rpm and feed of to give a chipload of 0.02mm to 0.03 so 400-600mm/min. This may not cut the flat outer area so a 3D horizontal will finish that off 0.1 or 0.2mm stepover So I would start with a scallop which will give even stepover. The ideal option for the rest would have been steep and shallow but that is paye foreven with the non free version, I usually set the adaptive to leave 0.3mm then the contour is done with one roughing pass at 0.2mm stepover leaving the final finish pass to remove 0.1mm

I would use a 2D contour to finish the main outer diameter. I'll be using a 3mm ball end 2 flute cutter and the spindle can run up to 10,000 rpm.Īny suggestions including feeds, speeds and step-overs for initial attempts would be gratefully received. There are a lot of alternatives even in the free to use version! To this end I have drawn a simple test piece to be cut from 1' square aluminium alloy:Ī 3D adaptive clearance should rough it out OK but I am at a bit of a loss as to what to choose for finishing. I have decided that it's about time I investigated the 3D milling capabilities of my Denford/Sherline Mach3 converted mill.

Fusion 360 milling