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I am having some issues with fuzzy edges left on 19mm. plywood on my cnc. I am cutting with 1/2" 2 flute chipbreaker compressions running about 18000 rpm at a rate of 18 m./min. I have in the past just done 2 cuts (one clockwise and the other counter clockwise). This then takes twice as long..any suggestions...?
Are you climb cutting or cutting against the rotation?
With plywood you will get a much cleaner finish with a "Power Cut" as opposed to "Climb Cut"
I have a two field cnc so one side cuts with rotation while the other cuts a mirror image therefore climb cutting(counter clockwise). I do notice a better finish when climb cutting. I suppose the best would be to climb cut in both fields but doing that in nesting could take some programming tricks.
After talking to the tech at biesse( i run a rover as well with biesseworks) he showed me a trick on my piece variable to export the symmetry. I still get mirror cuts in both fields but now i get the same direction of cut. I simply program my millings in reverse therefore getting a climb cut in both fields!! Problem solved!!
To eliminate the fuzzing use a 3 flute compression with serrations. We have been doing this for years for our customers
Could you guys define your "fuzzy" plywood?
The issue I have is with the plies that run perpendicular to the cut. I want the edges to be extremely smooth, as they do not get banded, but the plies that are cut as end grain don't look so hot. I'm using 3/4" birch Europly and the long grain parts are great, but the end grain parts are more pitted, like it's ripping out parts of those plies. Is this the fuzzy that you describe, because that's the issue I'm trying to solve.
Will the direction help this issue? Do chipbreakers address this? Do I just need to do an offset cut and a final pass where I shave off the final 1/32"? I would prefer an easy solution, like direction or different tooling, but the sanding required to deal with this issue unresolved is so time consuming, I'm happy to add an extra step if this is the way to go.
Thanks in advance!
a 3 flute compression chipbreaker will stop your issues. 1 pass and a perfect edge finish. email me for more info
Try putting a small Flex Trim head on a secondary holder and following the cut with a brush sanding. You will be amazed at what these heads can do for edges on a CNC machine. Call them to find out about it 855-437-3390. They give you 30 day test so you can see the results. Hope this helps