I would appreciate your opinion about the following.
I am thinking of running 2 finishing passes:
Rough Finish Pass: Using a ‘down cutter’ (the 1/4" one used for the roughing pass). Reason for this is to achieve some 90 degree angles on specific routings. I am using VCarve Desktop and I can’t select vectors for specific areas with 90 degree angles.
Fine Finish Pass: Using a 1/8" ball.
What do you think about this finishing approach?
What are you cutting? It’s hard to recommend a strategy with no idea of what the part is, what material, what you’re trying to achieve…
I am cutting a curved top design on a piece of poplar
I don’t know what version you have of V-Carve desktop. I use Aspire 11. My strategy on peice like that is a .25 ball nose and a .5 or 1 mm tapered ball nose after the .25 end mill roughing pass, on which I leave.005 for the ballnose. I set the ball nose at a 45 degree raster at 8% stepover. This strategy eliminates most sanding, and with rest machining lowers carve times.
Charles, so using a downcut bit for a finish pass is not a good idea?
Can you share the vector or a similar example? Seems like solving that problem would make this easier.
I cant. But imagine a wooden, rectangular stock. Then you carve a 3d half sphere over it and around the half sphere, a ‘ring’ or ‘channel’ whose walls have a 90’degree angle.
Couldn’t you just create a separate vector to generate a pocket? Or profile, depending on need?
I would opt for a ball mill for finishing. If I understand, you’re carving a 2d+ relief, maybe a dome of some kind, concave or convex. The ball mills will usually offer a cleaner finish.
What you need to use in Vcarve Desktop is the Moulding Toolpath. It will create that dome for you. Then you run a profile or pocket toolpath to get that groove.
Ask you question on the Vectric forum, too. https://forum.vectric.com/
Thank you everyone.
The question I have is, can I use a downbit to perform a FINISH pass, instead of a ball end?
Which are the pros and cons?
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