Help with getting bore to machine on size

[Anonymous]

This part has 2 boss's on top and two bores on bottom, the boss's come out dead nuts on size using wear compensation with a 2D contour path (wear offset set in machine offset table) however the 2 bores are under size using (-.043") using the same tool and wear compensation and 2D pocket path.

I'm pretty new to Fusion but coming from another CAM system but this has me stumped!

[alan]

I'm not sure but I think "wear" compensation maybe the issue.  I always use "In Machine" compensation.  The pop up explanation states negative value only for adjusting compensation.  

[Anonymous]

Turned out the stock to leave was the issue, coming from another system that would be the amount left for the finish pass, I didn't realize the tab below the # of finish passes was where you defined the finish pass stock.

Might be a good thing to emphasis in the tutorials!

[cobranco]

I've found when using the "bore" sequence, the "stock to leave" needs to be reversed when doing a boss. Apparently, when machining a boss, Fusion 360 programs it as a bore. So to leave stock on a boss, you have to use a negative number in the "stock to leave" box.  To make the boss diameter smaller, you have to use a positive number.

This is very confusing and frustrating and Fushion should point this out in the help pop up.

[seth.madore]

@cobranco 

I'm not finding that to be the case, a boss is leaving stock in the proper direction....