Hello all, Loving this forum, it is one of my 1st visits every morning.
I occasionally get this issue and never figured out why. The profile cuts 491 and circle were the same tool path (Vcrave pro, .25 2 flute straight bit, 100 ipm, plunge 50ipm, depth .125) The circle profile is smooth, but the numbers have missed spots? The 2nd tool path (hello spring) has the same missed spots? I even changed to a 1/8th bit and slowed down feeds and speeds, as well as run a separate clearance pass of 0.05 and then 0.01. I also tried upcut 1/18th bit, climb, conventional and plunge, but always exactly the same areas missed? I still get "missed spots"
It almost looks as if the piece isn't completely flat and there is some movement up and down as Mezalick has stated. When I am making a blank that size, I make it with wood strips no more than 3" wide and reverse the grain every other strip. I then run it thru my drum sander to make sure it's as flat as it can be.
Morning gents, The material was rock solid and remained in the same position while running the same toolpath multiple times. Each time making slight variations trying to clear the bottom of the pocket. The same areas were consistently missed? The circular pocket was run before the "hello spring" toolpath with no issues. 1st 491 - missed spots 2nd circle pocket - good clean 3rd hello spring - missed spots
Post by Axiom Tool Group on Mar 27, 2019 11:15:36 GMT -5
As mentioned, using two different bits has been known to cause this to happen.
On trick to help with that is to set your Z-0 on the spoil boards (bottom of the material) instead of at the top....this lessens the difference in reference points when changing bits and resetting the Z-0.
I only used a .25 2 flute straight bit no clearance bit. My final attempt was a 1/8 upcut bit but still the same spots not cleared. I really did try everything I could think of and searched google before reaching out. If the circle pocket had the same problem I would have said errors in the toolpath settings or hardware issue but the circle is clean and flat?
Hi, this is my first time posting. I'm not sure if you've found a solution to you issue yet. First which type of 2 flute cutter are you using? Router bit 2 flute straight, or 2 flute spiral endmill? Also when you are pocketing are you using offset or rastering. I was using offset at first but since I switched to Rastering cutting my pockets are very clean. The only time I get a small bit of material height change is when I use a large area clearance tool and then finish off my radius with a much smaller cutter. This can be very easily cleaned up.
Using a 2 flute straight, I tried offset and raster, with no clearance bit change.
Try using a spiral downcut endmill. Or even a 4 flute once you do all the clearing out with the 2 flute. I know that sometimes depending on the type of 2 flute straight the cutters can actually leave a section on the bottom of the cut uncut. Hope you get it figured out cause I know its a pain ruining good wood. Bentley