FreeCADView Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0002916 | Path | Feature | public | 2017-02-22 06:02 | 2021-08-25 15:40 |
| Reporter | EdgarRobles | Assigned To | |||
| Priority | normal | Severity | feature | Reproducibility | always |
| Status | confirmed | Resolution | open | ||
| Platform | Linux | OS | Ubuntu | OS Version | 16.04 LTS |
| Product Version | 0.18 | ||||
| Target Version | 0.20 | ||||
| Summary | 0002916: Add knife align up function to locate knife at begining cut precisely | ||||
| Description | You can see similar function in dxf2gcode application it align up the knife before begin to cut and between cut inputs. | ||||
| Tags | dragknife | ||||
| FreeCAD Information | |||||
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@EdgarRobles Thanks for the report. Just a tip to help bug triage and expediting your request: please always try to:
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Here is what i post but it is not in english https://forum.freecadweb.org/viewtopic.php?f=14&t=20620 ty didn't know about triage. |
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@EdgarRobles you can also ask in https://gitter.im/FreeCAD/Path Bug triage is when someone goes through bugs organizing them for clarity and helps get them to the correct people. ;) |
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Can you describe better what kind of behavior you're looking for in the 'align' function? Should the program pause to let the user manually align the knife or should it add some kind of lead-in move to give the knife time to pivot. If it's a lead-in move, how do I determine a safe position to start from? |
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Sure, If you try to make a dress-up knife path as fast as you start to cut it, you will see knife is not aligned at one specific direction; I think one simple solution could be say the final user align it by hand before start cutting always at the same direction. Other case might have to change it's between cuts for example if you have two squares at moment you wanted to cut the second square, it will be necessary to get down the knife and re-align (make a semi-circle to point the knife towards the first trajectory) I saw a little issue on the path you can see it from here: https://forum.freecadweb.org/viewtopic.php?f=14&t=20620 in the "dragknife.png" image. I saw on second edge that not do knife dress-up operation; I did a second test and always it misses the second edge. |
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This attach g code is from dxf2gcode dressup knife function, i think a example file is better than my words. xDD |
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Would one way to solve this would be to "drag the knife into the starting position" - if that makes any sense. Probably easiest to let the user specify a starting position from where to start dragging. The same is true for every independent Path. Whenever there is a rapid-move (aka the knife gets lifted off completely), there needs to be a "lead in" segment to orient the knife. |
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changing to feedback to keep track of ticket. |
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@sliptonic do you mind weighing in on the discussion at your earliest convenience? |
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I don't have a good solution at this time. I think the most expedient solution is for the dressup to add a pause event to give time for the user to align the knife. Basically, after every G0 rapid, check if we are descending to the cut depth. If so, descend to just above the material, insert a M0 command, descend to cut depth, and continue. I don't know if an M0 will work on controllers other than LinuxCNC This logic could be implemented as another entry dressup and applied optionally to dragknife dressed operations. |
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@sliptonic should I change this to a ticket as a feature request? |
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The simple solution of pausing and waiting for the operator to align the knife won't work for many machine controllers that don't allow interaction. For example, Smoothie doesn't even have a pause command. I don't know of a way to safely determine an entry position where a big entry arc could be cut to guarantee starting angle. I think it should be left as a feature request. Maybe someone will come along with a bright idea. |
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Changed ticket to Feature Request. |
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Opened a thread in the Path subforum for discussion: https://forum.freecadweb.org/viewtopic.php?f=15&t=42233 |
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Summary by sliptonic:
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This ticket has been migrated to GitHub as issue 5682. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2017-02-22 06:02 | EdgarRobles | New Issue | |
| 2017-02-22 06:02 | EdgarRobles | Tag Attached: dragknife | |
| 2017-02-22 12:37 | Kunda1 | Note Added: 0008403 | |
| 2017-02-22 14:20 | EdgarRobles | Note Added: 0008406 | |
| 2017-02-22 16:48 | Kunda1 | Note Added: 0008407 | |
| 2017-02-23 22:56 | sliptonic | Note Added: 0008415 | |
| 2017-02-24 19:58 | EdgarRobles | Note Added: 0008423 | |
| 2017-02-24 20:02 | EdgarRobles | File Added: Mascara de soldadura.dxf | |
| 2017-02-24 20:02 | EdgarRobles | File Added: Mascara de soldadura codigo G.ngc | |
| 2017-02-24 20:02 | EdgarRobles | Note Added: 0008424 | |
| 2017-02-28 19:29 | mlampert | Note Added: 0008476 | |
| 2017-03-02 11:51 | Kunda1 | Target Version | => 0.17 |
| 2017-03-23 23:55 | Kunda1 | Status | new => feedback |
| 2017-03-23 23:55 | Kunda1 | Note Added: 0008692 | |
| 2017-04-28 16:21 | Kunda1 | Note Added: 0008809 | |
| 2017-05-10 13:41 | sliptonic | Note Added: 0008938 | |
| 2017-05-10 13:46 | Kunda1 | Status | feedback => confirmed |
| 2017-05-11 21:27 | Kunda1 | Note Added: 0008965 | |
| 2017-05-25 15:51 | sliptonic | Note Added: 0009137 | |
| 2017-05-26 13:15 | Kunda1 | Category | Patch => Feature |
| 2017-05-26 13:15 | Kunda1 | Note Added: 0009147 | |
| 2018-02-08 15:36 | sliptonic | Product Version | 0.17 => 0.18 |
| 2018-02-08 15:36 | sliptonic | Target Version | 0.17 => 0.18 |
| 2019-01-22 05:26 | sliptonic | Status | confirmed => feedback |
| 2019-01-22 05:26 | sliptonic | Target Version | 0.18 => 0.19 |
| 2019-04-06 19:08 | Kunda1 | Status | feedback => acknowledged |
| 2020-01-06 16:36 | Kunda1 | Note Added: 0014002 | |
| 2021-02-06 06:33 | abdullah | Target Version | => 0.20 |
| 2021-08-25 15:39 | Kunda1 | Note Added: 0015864 | |
| 2021-08-25 15:40 | Kunda1 | Status | acknowledged => confirmed |
