Spindle Speeds for a cnc knee mill

[MrG]

Hi :

I am extreamly new to cnc.. i have only very limited experience in cnc for material such as modeling foam which is pretty easy to machine..

My question is that i want to machine some "organic" forms from wood.. inparticular i want to laminate russian birch ply wood 9 layers thick ..aboub 5 - 10 stacked up on eachother and them macnine it into a more complex shape...

however our machine is only capable of 4500 rpm.. and i understand with wood i need much higher speeds....

So is there anyway i can compensate for teh slow speeds of teh spindle.. can i find some really good bits, special bits to help me get soem decent results..

we have a cnc knee mill with a 4500 limit on th sindle...


all help will be greatly appreciated

[judleroy]

You can cut wood just fine on the mill. You should use a carbide down spiral tool to keep the top edge from fraying. For ballnose they don't make a down spiral that
I'm aware of so go with a straight flute for ballnose cutters.

[MrG]

thanks for the info .. some guys at work said they have issues with a fadal that runs up to 7500 ... and my school one only reaches 4500 .. but i will give it a try with what you mentioned ..

anyone else tried anything liek I have mentioned above??