Stepover 12.7x tool diameter!

[gtprototype]

It seems the default step over has expectantly changed from 95% to 1270%.  Thankfully there is an error message.  I look at the expression it just says "tool_stepover" if I reset to default there is no change.

[karina.harper]

Hi @gtprototype 

Strange - mine looks like this:

Math.max((tool_diameter - 2 * tool_cornerRadius) * 0.95; tool_diameter * 0.05)

[gtprototype]

Yeah, it is strange.  I didn't know there was a variable "tool_stepover" until today and I have no idea where it is defined and what changed it.  It worked fine before, I didn't change anything, and now it's wonky.  Looking at a previous cam file the expression is also "tool_stepover" and if I force a regen it doesn't get messed up.   

To duplicate the problem, I created a simple block and created a facing toolpath.  If I right click on stepover and "reset to built in default" the expression remains the same.  If I right click and "reset to default" it goes blank and the expression is also blank. 

I get the same 1270% results with any tool and any new tool path where you can modify stepover.  To make matters worse if I specify a stepover it automatically defaults back to 1270% when I edit the operation for any reason.

I created a template from a successful facing operation and created  a tool path in the file with the wonky results, even though the expression is "tool_stepover", it functions properly.

It gets even stranger, I get the same error message regarding the finish stepover on 2D adaptive even when there is no apparent place to change that variable.

I've attached a sample file for you to look at.

[gtprototype]

Made a screencast, sorry I don't have a mic yet so there is no commentary.

Screencast will be displayed here after you click Post.

[karina.harper]

Hey @gtprototype 

Can you try posting the screencast as a link?

Thanks,

Karina

[gtprototype]

Apparently it had to be approved first.

[karina.harper]

@gtprototype 

I think you might try doing an uninstall/reinstall. I'm not sure why this would be happening.

One note though - when you change an expression, the units are in mm. So the change is from mm to inches in the dialog after you change it.

Let me know if the issue persists after the uninstall!

Karina

[gtprototype]

Uninstall/Install and no change.  Flushed cache and no change. 

Created new file and tool path using a 2.0" Dia face mill from the sample tools and got the same problematic behavior.

-Default stepover value 25.4 in (Design and Manufacture set to inches)

-Equation edit shows "tool_stepover" (reset to built-in default doesn't change it)

-If I change the tool path to use a 50mm Dia face mill from the sample tools the stepover is 0.984252 in (25mm) and it works.

[karina.harper · Accepted solution]

Hi @gtprototype 

We figured it out!

It looks like this is a bug with the 'multiple feeds and speeds' feature flag. If you turn this off it should work fine 🙂

(internal ID: CAM-13723)

Special thanks to

@paul.clauss and @seth.madore !

Cheers,

Karina

[gtprototype]

FWIW, I checked the multiple-feeds-speeds when it was a preview in the preferences.  After one of the recent updates, prior to 03/17/19, I no longer got the preset speeds and feeds but instead the default speeds and feeds.  It seems the obnoxious 4 or 5 decimal places appeared around the same time too.  When I edited the tool multiple legacy presets appeared; to get the correct speeds and feeds, I had to delete all but one of the legacy presets and regen my toolpaths.  Because of the hassle, I tried to turn off the multiple-speeds-feeds but the preview was no longer in the preferences menu.  I didn't know I could turn it off so I embraced the change and I started defining presets for different materials and aggressiveness.  Having got my feet wet, I'm slightly disappointed having to turn off this feature however, any disappointment is eclipsed by having a work around and more importantly the vision of what is just over the horizon!  Keep up the great work Fusion Team!

My sincere thanks for your help, Karina, and the collaborative efforts of Paul and Seth behind the scenes!  Although this is only my third interaction with the support team, I am thoroughly impressed with the help I've received as a new Fusion user.  

Regarding the tool_stepover variable, does it come from multiple-speeds-feeds and is it something that we will be able to specify inside a preset in the near future? (please, please, oh please)

Now that I have a workaround, I'm back to milling around.

[karina.harper]

Thanks for your input @gtprototype .

That helps us in trying to prevent a situation like this in the future. I've passed along this information in the development ticket we created.

Happy milling!

Karina

[salvadore.bertolone]

this is great to have a solution to this, i was stuck when this became an issue within the last week.  i noticed it was not letting me change the step overs or step downs on 3d paths and couldnt figure out how to turn the multiple speeds and feeds off.  awesome to have a solution for this.  thanks so much.

[karina.harper]

Hi @salvadore.bertolone 

Do you remember how you turned it on originally? Did you use the CAM.FeatureFlags text entry?

Cheers!

Karina

[salvadore.bertolone]

its a possibility i did when i was trying to get the machine setups back after they disappeared.  iirc it kind of worked for a while, but didnt cause problems until about a week ago.  also side not the html json tool library just gives a blank screen when opening the tool library, wasnt going to make a whole thread for it as its probably very early development.