HI,

Long time woodworker and new to CNC. I have a baby CNC, the Shapeoko 3 with a Makita trim router. I'm curious about the RPM that software suggests.

The RPM suggestion that Carbide Create and Fusion 360 give me, seem very low.. Example, I am cutting 3/4 plywood just for some testing and it says to use 6,000 RPM? I tried this and it was just way too slow and seemed to really struggle. I have been sticking with the suggested feeds and speeds, but use around 27000RPM and it has been working fine.

Does anyone know why these suggestions are so low?

Thanks.