https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148454#M178372 <P>hello guys, I'm having a weird problem that I believe its a bug, this op was working just fine a couple of days ago and yesterday when I made some changes to the design and regen the toolpaths it got messed up. it's a simple contour with a 45deg 6mm dovetail mill to make a backchanfer but it's going WAY outside, I didn't noticed until I remachined the part and at the end the part wasn't chamfered. I didn't even checked the sim because I didn't changed the design on that profile so if it was working fine I assumed it was still good...&nbsp;<BR />I tried to delete and redo the operation and still doesn't do the correct offset.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_f0AF5cY0yF.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642878i722613FA4609C188/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_f0AF5cY0yF.png" alt="Fusion360_f0AF5cY0yF.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_YzZLn0aiWD.png" style="width: 250px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642875i98B11A3093B9D2B4/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_YzZLn0aiWD.png" alt="Fusion360_YzZLn0aiWD.png" /></span></P><P>&nbsp;</P><P>I have a similar op on another setup with similar parts arrangement (lids for the other parts) and its fine BUT if I regenerate the toolpath it gets wrong too so it's definitely a bug...</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_xWROmOapYv.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642876iACC7379B8F166AE6/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_xWROmOapYv.png" alt="Fusion360_xWROmOapYv.png" /></span></P><P>&nbsp;</P><P>after regen</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_ZuirTcBHEB.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642877i087DDD7FC0C798CA/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_ZuirTcBHEB.png" alt="Fusion360_ZuirTcBHEB.png" /></span></P> Sun, 31 May 2026 10:56:02 GMT Bruno_Silva1WQZ3 2026-05-31T10:56:02Z https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148454#M178372 <P>hello guys, I'm having a weird problem that I believe its a bug, this op was working just fine a couple of days ago and yesterday when I made some changes to the design and regen the toolpaths it got messed up. it's a simple contour with a 45deg 6mm dovetail mill to make a backchanfer but it's going WAY outside, I didn't noticed until I remachined the part and at the end the part wasn't chamfered. I didn't even checked the sim because I didn't changed the design on that profile so if it was working fine I assumed it was still good...&nbsp;<BR />I tried to delete and redo the operation and still doesn't do the correct offset.&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_f0AF5cY0yF.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642878i722613FA4609C188/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_f0AF5cY0yF.png" alt="Fusion360_f0AF5cY0yF.png" /></span></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_YzZLn0aiWD.png" style="width: 250px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642875i98B11A3093B9D2B4/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_YzZLn0aiWD.png" alt="Fusion360_YzZLn0aiWD.png" /></span></P><P>&nbsp;</P><P>I have a similar op on another setup with similar parts arrangement (lids for the other parts) and its fine BUT if I regenerate the toolpath it gets wrong too so it's definitely a bug...</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_xWROmOapYv.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642876iACC7379B8F166AE6/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_xWROmOapYv.png" alt="Fusion360_xWROmOapYv.png" /></span></P><P>&nbsp;</P><P>after regen</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fusion360_ZuirTcBHEB.png" style="width: 999px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1642877i087DDD7FC0C798CA/image-size/large?v=v2&amp;px=999" role="button" title="Fusion360_ZuirTcBHEB.png" alt="Fusion360_ZuirTcBHEB.png" /></span></P> Sun, 31 May 2026 10:56:02 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148454#M178372 Bruno_Silva1WQZ3 2026-05-31T10:56:02Z https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148482#M178374 <P>This is a known bug. Reduce the shaft diameter to that of your relieved section</P> Sun, 31 May 2026 11:57:10 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148482#M178374 seth.madore 2026-05-31T11:57:10Z https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148860#M178381 <P><a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/6965551">@seth.madore</a>&nbsp;Thank you, I had the same issue. Posted in support forum&nbsp;</P> Mon, 01 Jun 2026 01:46:54 GMT https://forums.autodesk.com/t5/fusion-manufacture-forum/backchamfer-op-wrong-after-update/m-p/14148860#M178381 CNCBits 2026-06-01T01:46:54Z