A few things to check (besides the g-code):
When you save your g-code is the "use G28" checked? Is G28 defined?
Where is Z=0, top of material or top of spiilboard? Same for both tool paths? Were both toolpaths part of same CAM "setup" in Fusion 360?
Does it look like bit may have slipped in collet?
Are you a regular user of Fusion 360 or was this a relatively new experience?
Was there anything else running on you cnc control computer at the time (software update, antivirus, etc.).
Thanks for the reply BalloonEngineer. I don't see G28 as an option, and looking at the code it isn't used. Should it be in the Post?
Z=0 is the bottom of the stock, the program is set to leave 0.10" of stock at the bottom. Yesterday I didn't have a spoilboard (doh!) but this morning I put a spoilboard down and used "ZSpoil" offset in my controller.
No slipped collet.
It did it in the first operation when I ran it this morning.
I have cut a few things with fusion, it has dragged the top of a piece once but that was it. It seems to be going to the program's Z0 not the machine's Z0.
Full disclosure I am by no means experienced. I've just read a whole hell of a lot and played with the program for a long time before getting my router, so please forgive me if this is an amateurish issue.
Here's how the g code reads at the end of the operation:
N15805 G00 Z1.35
N15807 M05
N15808 G53
N15809 G00 Z0.
(next lines of code are the next operation)
I am considering using my NC editor and replacing line 15809 with G28.
Your thoughts would be much appreciated.
-Ronnie