Adaptive 3D "rapid move into stock" error

[gj101]

I've tried a few things unsuccessfully but can't figure out how to eliminate this one error...

[nubrandao]

My tip for simulation is:

Always simulate setup and not specific toolpath 

For example:

Your first setup you a block stock

You have 3 toolpaths 

Rough, semi finish and finish

If you simulate everthing from beggining, when the finish toolpath starts, the material already is out.

But if simulate ONLY finish, Fusion Will assume is still all the material (block) and for Fusion, the toolpath is enter agressive into stock and error appears

If you have stock calc actived auto, sometimes, Fusion didnt had calc stock already and when simulation, Fusion assume is still already stock from the beggining.

For me, i always have automatic stock disable and always simulate from setup and jump to the end when verication is finish.

If i want to check colision, i simulate that toolpath specific, disable stock and see the colision report and try to see a specific error like shaft or holder colision

[scottmoyse]

I'm guessing this is a false positive because your simulation stock accuracy is set to below maximum. 

It's also possible your in-process stock from your first toolpath has some residual artifacts / accuracy issues. 

[gj101]

Thanks for the reply. I’m a little bit of a noob…. Are you saying that I
need to verify the stock accuracy on the Initial Setup tab Or am I missing
something in The actual toolpath tabs?

[scottmoyse]

I'm referring to this setting in Simulation:

[nubrandao]

Hey, do you have any idea how is accuracy bar works between low and max in terms of tolerante?

For example 

I usually have the low to see Faster

But in the end of the project i increase to max but takes lot time

I would like if the low is like 1mm tolerante, and high is 0.01 tolerância 

Because for me, in powermill we try to work around 0.05 tol

[seth.madore]

@nubrandao the Accuracy slider isn't a static tolerance value, but based on tool/tool-tip radius:
The slider affects the facet tolerance of the tool.  The tool is modelled with a polygonal cross section, not circular.  At the lowest setting, the tool might be modelled with a square cross section! Each click upward on the slider halves the facet tolerance, which increases the number of sides in the polygon in the cross section. It's hard to put exact numbers on it. But when the slider is in its default position (three clicks up from the bottom), the facet tolerance is 0.02 * tool_radius. So the actual tolerance changes from one toolpath to the next as the tool changes.  Different diameter tools cut to different accuracy.

[gj101]

Well I tried to run the toolpath again and didn't make it past the first 3D adaptive pass as the entire collet plunged into the stock and got stuck and starting to smoke (attached pic for example of what happened). The weird thing is I didn't get any errors this early in the cut....but later in the timeline it would pass "rapid move into stock" errors.

I guess my question is this the best strategy? Like why is it not cutting per z depth levels and moving on down instead of plunging deep into the stock?

Thanks for the help with this...it's been a head scratcher but critical for me to solve with these 2-sided flip milling projects!  

[programming2C78B]

please attach your code.

[gj101]

Hi - thanks for taking a look...I've attached the first 3 toolpaths below. 

[programming2C78B]

I dont know how you expect to mill this out of the solid with no adaptive roughing, and the Z seemingly up in the air? 

Are you very new to Fusion + CAM ? 

[gj101]

Well I’m using the 3-D adaptive tool path…Are you saying I need to use 2D adaptive tool path instead? I have two setups and side B has the Z flipped to the opposite corner so perhaps you selected that set up and are seeing it flipped?

[programming2C78B]

Yes but generally there'd be a sq endmill that would come in first and remove that giant chunk of material first, leaving 1/8th or so. The toolpaths you posted certainly do not rough enough to make this part properly!

Im look at the CODE you posted not your project files. 

[gj101]

Well that's the point of the 3d adaptive clearing tool path to get rid of that material leaving a bit for finishing. Not sure if looking at code will help resolve this issue??

[scottmoyse]

Based on your photo, it looks to me like you have set it to just plunge straight down into your stock... and haven't provided it with the containment boundary necessary to allow the tool to enter from outside the stock. 

What's run there, doesn't match the first two 3D Adaptive Clearing toolpaths you had in the sample F3D file you provided. Because those toolpaths are clearing the stock as I would expect them to. 

[gj101]

Ah very interesting but I see the logic. Is this the same setting as machining boundary? I’m trying to keep the corners for the flip side suspension.