Feed optimization slows ALL corners when "only inner" is checked

[FrodoLoggins]

For the past few months, selecting "only inner corners" in the "Feed Optimization" section does not apply feed optimization to only the inner corners. It applies it to all corners, for example:

I've had this issue on 2 rMBPs (2016 15", 2019 16"). Both with latest Fusion version. 2019 16" is on a fresh new install.

Let me know if you need anything.

Also you guys need to allow longer post titles on the forum lol.

[seth.madore]

Yep. This issue has existed from the very beginning. The trick is to find the radius value that will hit the internal radii but ignore the external. Sometimes that's not possible....

I'll add this to the ticket Actually, I'm not finding an active ticket on this issue, I will open one and post back here when I have more info!

[FrodoLoggins]

[seth.madore]

Yep, the bug still exists and quite likely will remain "as-is" for some time.

CAM-19631 for reference.

[FrodoLoggins]

Do you know when the feedrate optimization option was first added to Fusion?

[seth.madore]

I think it's been there since day one. AFAIK, all the original toolpaths were ported over from HSMWorks

[FrodoLoggins]

Hi @seth.madore I'm noticing this behavior again and someone liked my OP a few days ago so I'm assuming I'm not the only one.

Should we log another ticket or is the original ticket still active?

[dwilliamsFM6K4]

Ya would be really great to not have to make separate toolpaths for internal / external if this actually worked as intended

Maybe in another 2.5 years. Sometimes I think these tickets are quite literally, never looked at

Don't really understand how this would be that hard to address, as in a 2D contour operation the direction is clearly managed by the direction arrow on contour select / the cutter side dropdown box, just flag any radius value as either INT or EXT based on that alone, and apply the FeedOpt feedrate, hell if you just read the upcoming radius value you could automatically feed adjust for ANY corner dia external or internal. That would be incredible

Sometimes I think I missed my calling as a software programmer not just a toolpath programmer

[seth.madore]

The feedrate slowdown being applied to outer corners is a bug and it's been documented for some time. Sadly, it doesn't seem to rise to the level of importance we (the users) would prefer to see...

[hunt_fred]

It took me a little while to figure this one out, but it isn't necessarily an actual bug. It functions correctly with one massive caveat. The "Reduced Feed Radius" in the dialog box doesn't refer to the radius of the part, it applies to the radius of the posted code. Therefore if you put in a large radius for that variable, it will include the outside radii as well. For instance if you have a part with uniform .200" inside and outside radii using a 3/8" EM, it will only do the inside radii until the input is greater than .3875". This feature isn't overly smart (aware of the model). It simply slows down all radii below that threshold in the actual code... so even when set correctly a small outside radius might get slowed down and a very large inside radius might not.

[engineguy]

@FrodoLoggins 

@hunt_fred 

@seth.madore 

@dwilliamsFM6K4 

Well, decided I had better have a look into the cornering with reduced feeds, it got "interesting" so I did a Screencast because there is too much to type here 🙂 🙂 🙂

Maybe it will be of interest to someone ?? 🙂 🙂

First, as there are no internal corners in the OPs file then it isn`t going to do anything that I can see, Radius has a value in it so therefore it will create reduced feed Radii both inner and outer depending on the value, as @dwilliamsFM6K4 suggested it is pretty "dumb" as it is working only from the values input and does not appear to be "model aware", or does it need to be ?? Answers on a Postcard to Autodesk maybe ?? 🙂

Screencast link here :-  https://autode.sk/3DjyibC