Finished my CNC router I'm quite happy with it, this awesome feeling when you see it finally moving ^^.
As you can see circular interpolation as well as linear interpolation work well.
I've used the G-code interpreter posted by aventgps(is or was also member here) apparently it's reprap firmware, however the newer versions don't look alike.
You can find my code below.http://pastebin.com/A7tRGgd7
Bit more info
Steppers do 48 steps per revolution
Were initially unipolar but I cut the center wire so they act as bipolar now.
The one for the X axis is a pm55l048
I do suggest stronger steppers these probably won't be moving a mill even if it's through balsa.
If anyone can suggest some good ones would be appreciated.
I used two l239d quadruple H-bridges to drive the steppers. The circuit can be found on the main site.
I hope to gain some more experience with it before I move to a bigger model
Probably will spend the hollidays writing a spoonfeeder and some programs which output G-code.
When I see it moving it remembers me of that one song "She's incredible math. Just incredible math" ^^Special thanks to johnwasser and PeterH for the quick response while troubleshooting.