Need help with slicing an object! Any tips?

[Anonymous]

Hello! 

I have made a spoiler for a car, now I would like to slice it using Slicer for Fusion 360 to use it on a CNC milling machine, but I've never done this before, but I'm very much willing to learn, but can't seem to find the right answers online!

First of all the dimensions for the CNC are X: 120cm, Y: 170cm and Z: 12cm, using a 6mm ball head.The material used is DSP 120x60x1.8 cm. I guess I have correctly input all the specs in Manufacturing settings (pic below), but I have no clue what to do now, because the part is larger than the material(pic below)! How do I set this up correctly, to get the g-code and fix the issue? I uploaded my .obj file below, so any tips or help would be greatly appreciated! 

The Settings

Parts are too large for the material!