Need help with feeds/rates/settings!

It looks (I’m not a Carbide Create user so limited ability to read those settings) like you’re cutting in about 1.1mm depth passes. What sort of a cut are you making, a full depth cut through just the width of the cutter?

Which parts of the cut are messy? Is it tearout on the top surface or are the cut walls messy? Or both?

In addition to Will’s links on understanding the feeds and speeds, here’s a thread about Baltic Birch ply which contains some relevant discussion about surface finish;

This is an example of a compression cutter;

On this you can see that the majority of the cutter has a downward spiral to down-shear the wood fibres at the top surface and then the bottom 6mm reverses to an upward spiral which lets it up-shear the fibres on the bottom of the wood. This can only work when the bit is engaged deeper into the wood than the length of the upcut at the bottom though so they’re commonly used as a ‘finishing pass’ after doing the roughing out work.

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