https://forums.autodesk.com/t5/fusion-support-forum/fusion-miscalculated-duration-of-cam-operation/m-p/13988701#M213468 <P>Hi realized that Fusion is incorrectly calculating the duration of CAM operations when utilizing inch tooling in a metric file. I ran the simulation and saw that the speed used was the inch feed rate number as mm/rev.</P><P>&nbsp;</P><P>I changed the tool to metric and the duration calculation makes sense.</P><P>I am running the lated version of Mac OS and Fusion360</P> Sat, 24 Jan 2026 01:49:47 GMT WestCoastRCWorks 2026-01-24T01:49:47Z https://forums.autodesk.com/t5/fusion-support-forum/fusion-miscalculated-duration-of-cam-operation/m-p/13988701#M213468 <P>Hi realized that Fusion is incorrectly calculating the duration of CAM operations when utilizing inch tooling in a metric file. I ran the simulation and saw that the speed used was the inch feed rate number as mm/rev.</P><P>&nbsp;</P><P>I changed the tool to metric and the duration calculation makes sense.</P><P>I am running the lated version of Mac OS and Fusion360</P> Sat, 24 Jan 2026 01:49:47 GMT https://forums.autodesk.com/t5/fusion-support-forum/fusion-miscalculated-duration-of-cam-operation/m-p/13988701#M213468 WestCoastRCWorks 2026-01-24T01:49:47Z https://forums.autodesk.com/t5/fusion-support-forum/fusion-miscalculated-duration-of-cam-operation/m-p/13988707#M213469 <P>I did some more testing and found that when I uncheck "feed per rev" the duration calculation is working.</P><P>&nbsp;</P> Sat, 24 Jan 2026 02:08:53 GMT https://forums.autodesk.com/t5/fusion-support-forum/fusion-miscalculated-duration-of-cam-operation/m-p/13988707#M213469 WestCoastRCWorks 2026-01-24T02:08:53Z