FreeCADView Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001933 | PartDesign | Bug | public | 2015-01-26 12:54 | 2017-03-08 19:09 |
| Reporter | thor | Assigned To | kkremitzki | ||
| Priority | normal | Severity | minor | Reproducibility | N/A |
| Status | closed | Resolution | no change required | ||
| Summary | 0001933: Pocket from multi-arc sketch leads to invalid geometry | ||||
| Description | Trying to create a hole in a body with a sketch constructed of many arcs results in geometry where you can see the sketch contours show up on both sides (using "through all"), but what should be a hole is filled up. A similar result can be obtained be extruding the sketch in the Part workbench and trying a boolean subtraction. I did try to simplify the multi-arc sketch, but did not manage to reproduce the issue with only a few arcs. | ||||
| Steps To Reproduce | - Open attached file - Select "Spline 21T Internal Shape" sketch - Use "Pocket" | ||||
| Additional Information | OS: Ubuntu 14.04.1 LTS Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.15.4527 (Git) Branch: master Hash: 0da2e4c45a9a259c26abd54c2a35393e1c15696f Python version: 2.7.6 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 6.7.1 | ||||
| Tags | No tags attached. | ||||
| FreeCAD Information | |||||
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I notice your arcs in the "Spline 21T Internal Shape" sketch are all tangent to an outer construction circle of radius 2.5mm which is the same radius as in "Bottom Hole Circle". Booleans in FreeCAD are notorious for not liking surface tangency much. It looks like it simply cannot handle so many tangency situations. A workaround is to change the radius of the construction circle to 2.499mm. Then the pocket works as expected. |
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This seems like workflow rather than software error. Resolving as 'no change required' unless devs decide differently. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2015-01-26 12:54 | thor | New Issue | |
| 2015-01-26 12:54 | thor | File Added: servo_horn_21t_turnigy_tg9z.fcstd | |
| 2015-01-27 05:01 | normandc | Note Added: 0005742 | |
| 2017-02-10 04:56 | Kunda1 | Note Added: 0008259 | |
| 2017-02-10 04:56 | Kunda1 | Status | new => resolved |
| 2017-02-10 04:56 | Kunda1 | Resolution | open => no change required |
| 2017-02-10 04:56 | Kunda1 | Assigned To | => Kunda1 |
| 2017-02-10 04:56 | Kunda1 | Assigned To | Kunda1 => |
| 2017-03-08 19:09 | kkremitzki | Assigned To | => kkremitzki |
| 2017-03-08 19:09 | kkremitzki | Status | resolved => closed |
