I'm cutting mdf slab doors on a Multicam 3000. The small beveled outside edge (about 3/16) is cut with a 45 degree V-carve bit. I getting a lot of chatter, less towards the corners, more in the middle. Just looking at the picture, any suggestion why this may be happening? Bit - machine - cutting direction speed, ....
thanks Stefan
From contributor Fr
Depending upon the shape of the tool, this may be caused from the direction of cut. You may want to try reversing your direction of cut for this tool only. If you are cutting in a clockwise direction, try counter-clockwise. If you are cutting in a counter-clockwise direction, try clockwise.
Direction of cut may not have any effect on solving your problem, but it might be worth a try.
-Just a thought.
From contributor Ke
Feed rate to fast....or cutter not concentric....or combination of both....
From contributor St
The fact that it's better near the corners where the feedrate slows down, let me try to change the feedrate first.
thanks,
From contributor Ma
My V groove Is a single flute replaceable tip tool. It looks to me like you are correct, either increase the RPMs or slow down the feed rate or both. My V groove Is a single flute replaceable tip tool. If your starting point for feed and speed s what you typically use for say, a 2 flute cutter that s a good indication of the problem.
Look to the simple stuff first.
From contributor Br
I have found that chatter is the result of vibration, something is moving. While a feed rate may improve the situation it will not solve it. Figure out if the part is moving or is the machine flexing? I have seen some of these smaller machines flex when pushed but That is a small cut. I would probably program that at 18000 rpm and somewhere between 600 and 650. But find the vibration the high spots are where the distance between the edge of the panel and the center of the cutter is changing.
