Fusions generated tool path incorrect, simulation operates correctly

[Anonymous]

Fusions Cam is incorrectly generating cutting tool paths when there is a mix of linear and circular movements.    The tool path its generating is NOT what the simulation is displaying.  Pretty much any time it switches from linear to circular, it screws up the 1st arc instance.  The simulation correctly shows what the tool path should be.   I'm using the sample waterjet tool in the included tool library is that matters.

The most basic test showing this is w a 6" circle cut.   See 1.jpg attachment

The tool path... See 2.jpg attachment

In there, line 10 is listed as a linear cut.  This is incorrect!   Its a circular.

6.5, 3.5 is 3 o'clock position of the circle.  So its saying to start a line at 3 o'clock and go straight to 6 o'clock.  It correctly completes the next 3 arc's for the circle and switches to the lead out.

This is what the toolpaths actually generating in this example.  See 3.jpg attachment

Its reproducible on every machine i've tried, 3 so far.  Did the last update hose the cam?

Want a simpler example- draw a straight line and connect a 180 arc to it......like a candy cane.   View the toolpath, the 1st switch to circular is missed.  It draws the stick, then straight line to the midway point of the arc, then draws the last 90.

Any ideas?   Thanks!

[johnswetz1982]

What post processor are you using?

[Anonymous]

You don't even need to select a post processor because its screwed up as soon as the tool path is generated.   When you select any post, it just pushes the missed switch to arc commands through the processor.   The post processor directly reads that tool path, which you can't feed it garbage and expect it to work correctly.  

There's a couple threads i've found since I wrote this where the users are thinking their post file is screwed up.  They even used basically the same circle example as I did.   They are flow waterjet related, no mention of confirming the listed tool path.  I'm guessing they ran the simulation and assumed the tool path was good.  Simulation displays correctly.

When I get back tonight, i'll change the tool to something other than the provided sample waterjet tools in the library.  I'm doubting any difference here, but its worth a shot.

[johnswetz1982]

I get 3 arcs of 120 degrees, If you dont want to attach your file or what post you are using it is going to make it more difficult to solve *if* there is an actual problem.

[Anonymous]

my home machine, which is showing at the top it was just updated....  Accessing my same file, i'm getting 3 arcs also now...WTF?   

[daniel_lyall]

@Anonymous  The person who is trying to help you need to know what machine control you have and what post you are using otherwise it is a stab in the dark to what is wrong.

[seth.madore]

@Anonymous I don't care about the machine or post processor at this point, but I'd really like to see your files. Just to confirm, you are up to date on Fusion, you should be at 

To share the file: File > Export > Save to local folder. Return to thread and attach the .f3d file in your reply

[seth.madore]

A quick test drawing up your part as close as I could figure yields this for a toolpath:

[johnswetz1982]

@seth.madore I *think* what poster was trying to convey (and its hard to tell without actual file) is that he was trying to draw a circle but that the path being put out was what he had sketched in pick 3 (and you redrew?) Do you get that same path from a full circle? 

[seth.madore]

Oh, I see what you're saying..

Yeah, we are going to need to see the file. I strongly suspect that there is actually no issue here and there is a misunderstanding of what's actually going on. But, hard telling without the file.

*EDIT* No, a full circle gives me a toolpath as I would expect. It's understandable, looking at the "toolpath" XYZ moves to think something inappropriate is taking place, but that's really not the case