Carving into Walnut, does this sound ok?

CNC Machines Shapeoko
2
  1. see this
  2. what RPM are you using ? Chipload may be slightly off, or it may just be a resonance: try changing the RPM slightly, see if the chatter disappears
  3. how fresh is your cutter? A dull endmill will tend to rub instead of cutting, and might vibrate
  4. reduce that stickout and/or use a shorter endmill. Less likely to vibrate
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