help needed on fusion 360 and g code

[Washout]

Just an idea - when my machine starts any job posted from Fusion 360 it does a full retract to the machine's Z axis zero point i.e. full retract to the "up" limit and then continues the job. Its not going to the stock or work zero for Z axis. This is a "safety" feature I think in the Fusion 360 post in order to ensure the work piece is cleared from whatever starting position your tool is at.

Sounds like you may have your machine set up so that its Z axis machine zero is either at the top of the work piece or on the bed and the full retract my machine is performing is a "full down" to the bed move (machine zero) on your machine before continuing.

Hope that helps.