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Mill Slots Cuts Out Whole Pad

reynolds087
Sat, 11 Sep 2021 06:37:07 GMT

I am trying to mill the slots of a barrel jack footprint from KiCAD, but flatcam cuts out the whole pad rather than just milling the slot in the middle of the pad. I also noticed instead of milling holes like a pocket, it cuts an outline leaving the middle untouched. This can sometimes cause a small end milll to snap if the loose material in the center of the pad breaks off and crashes into the bit at high rpm.

Marius Stanciu
Sat, 11 Sep 2021 18:27:05 GMT

>flatcam cuts out the whole pad It very much depends on the settings you used. > it cuts an outline leaving the middle untouched There is always room for improvement but for the time being it's good enough :)

reynolds087
Sat, 11 Sep 2021 20:54:01 GMT

I think this is a bug. If I use the exact same settings, but have all of the tools in the tools table selected, and choose mill slots, it will cut out the outline of the pad containing the slot, completely cutting the entire pad out of the board rendering a failed board. If I only select the specific tool containing the slots, and choose mill slots, it just cuts the actual slot in the middle of the pad. No settings were changed between the two processes, but one scrapped the board and one cut as expected. As far as the second issue, I disagree that it's "good enough". It really should treat the hole like a pocket. It's rather expensive to replace these tiny end mills. Each one costs about 5 dollars. Milling the center of the pad would prevent the center piece from coming loose and destroying the end mill.

Marius Stanciu
Sat, 11 Sep 2021 23:56:00 GMT

>have all of the tools in the tools table selected, and choose mill slots, it will cut out the outline of the pad containing the slot, completely cutting the entire pad out of the board rendering a failed board If you do that, selecting all the tools, the generated geometry paths for a certain tool looks like in the same position compared with just single selecting that tool?

reynolds087
Sun, 12 Sep 2021 00:49:33 GMT

Selecting all tools creates an outline of the entire copper pad for each slot, instead of just milling the slot into the pad. If I single-select the tool, then it only mills the slot as you would expect it to.

Marius Stanciu
Sun, 12 Sep 2021 21:30:33 GMT

Can you send me the Excellon file with which I can see the issue? I can not replicate this problem. What version of FlatCAM are you using?

reynolds087
Sat, 01 Jan 2022 04:22:52 GMT

Yes, where should I send it to? I am running v8.993.

Marius Stanciu
Sat, 01 Jan 2022 08:40:24 GMT

Hi, If possible you can post a Google Drive/Dropbox/Mega etc link here....

reynolds087
Tue, 04 Jan 2022 06:53:19 GMT

https://reynoldstechnicalservice-my.sharepoint.com/:u:/g/personal/josh_reynolds_reynoldstechnicalservice_onmicrosoft_com/Ee8ZIvnPf7FKlNGpINu27kIBAUgPpsph4l3fn19wMVSUkQ?e=Z0R9Um

Marius Stanciu
Tue, 04 Jan 2022 16:45:31 GMT

Thanks for the file. It looks like whatever was the issue it is solved in my working copy from here: https://bitbucket.org/marius_stanciu/flatcam_beta/branch/Beta_8.995 BTW, I've implemented in the above the feature you requested initially: milling slots (and drills) from the center to the outline of the hole.

reynolds087
Tue, 04 Jan 2022 17:05:44 GMT

Thanks, that is great!! I appreciate it