[jesastrup]

Hello everyone. I'm quite new in the CNC game, and i have some major issues when i try to machine 3d reliefs on wood.

The typical problems which i expect is that if i first do a roughing and then a machine relief, i still on the wood get a clear difference in the material where it should have smoothed over. Look at the attached image.

I've used a 6mm roughing and a 6mm ballnose for this, stepover for ballnose is 0.72 and 6mm stepdown.

Please, any help is greatly appreciated :-)))

[WoodSpinner]

Hello everyone. I'm quite new in the CNC game, and i have some major issues when i try to machine 3d reliefs on wood.

The typical problems which i expect is that if i first do a roughing and then a machine relief, i still on the wood get a clear difference in the material where it should have smoothed over. Look at the attached image.

I've used a 6mm roughing and a 6mm ballnose for this, stepover for ballnose is 0.72 and 6mm stepdown.

Please, any help is greatly appreciated :-)))

Looks to me like the z for the second tool isnt set the same as the first

John

[jesastrup]

Looks to me like the z for the second tool isnt set the same as the first

John

The machine has a sensor which i use to define Z, so it seems somewhat unlikely, doesnt it?

[awerby]

What I think you're seeing is the gouging caused by using a flat endmill for your roughing. Switch to a ball endmill for the roughing pass and those erroneous cuts should disappear. Also, use a better piece of wood, once you get this working for you...

Andrew Werby
www.computersculpture.com

[EBC]

you need to set your roughing pass with a "machining allowance" that is not as deep as your finish pass. Using a end mill even twice the diameter for the rough pass is fine if this allowance is correct. This panel rough pass with 12mm end mill finish pass with 6mm ballnose. You should be able to see your problem in you toolpath previews...

[jesastrup]

What I think you're seeing is the gouging caused by using a flat endmill for your roughing. Switch to a ball endmill for the roughing pass and those erroneous cuts should disappear. Also, use a better piece of wood, once you get this working for you...

Andrew Werby
ComputerSculpture.com — Home Page for Discount Hardware & Software

Thanks for this tip, i've attached the result after using ballnose as both roughing and finishing pass.

I'm happy about the result considering its my first sign on the cnc with 3d ;-)

I still have a bit left on the last finishing touches tho

[awerby]

That's looking a lot better. Rumpa Rumpa!

Andrew Werby
www.computersculpture.com