Need Help!- Freemill 2-sided milling

[Gosa]

Hello, I'm quite new to CNC and milling and started using Freemill to machine simple 3d objects.
It works ok for single sided objects, but I need to mill a cone and would like to turn the part around and mill the other side.
Problem is that I cannot figure out how to rotate the part so that the Y-axis lines up.
I set the parting plane into the middle of the object created a post-proc.file for the first side, then went back to the milling axis page rotated the part 180 degrees and created the second post-proc. file
Problem is that I don't know which dimensions Freemill uses as the raw part size? It is bigger than the part itself for sure, even if the offsets are 0.
When I turn the part around, I have had an offset of 12 mm.
I'm milling with a 8mm mill and set an y-offset of 3.9 (as my raw block was 3.9 mm larger than the part. Is this a coincidence that I get 8+3.9 ^= 12??

How should I chose my part zero on my machine? do I have to compensate with the y-offset? How do I enter the raw block size into Freemill?
Also, the Mecsoft page claims that you can use ball or flat or corner radius mills, but I cannot set the radius to 0, it is limited to half the diameter??

Any help greatly appreciated...

[dbtoutfit]

I'm assuming the cones final height dimension is too tall for your Z axis and this is why you are machining the part on its side? Because if not I would definitely machine it standing up if not.

[Gosa]

Originally Posted by dbtoutfit I'm assuming the cones final height dimension is too tall for your Z axis and this is why you are machining the part on its side? Because if not I would definitely machine it standing up if not.

Indeed, it is too long. I have not retried since, haven't found the time, but I'd still be interested in any experience with free-mill