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by JoshM
Sun Mar 10, 2019 3:50 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 39
Views: 3083

Re: Waterline milling update

The difference in the two sides is because of mesh deformation in the offset mesh. Still looking at fix for that.

I tested against a toroid at an angle, and was pleasantly surprised.
dropcutter_example_005.png
dropcutter_example_005.png (123.71 KiB) Viewed 517 times
by JoshM
Sat Mar 09, 2019 10:57 pm
Forum: Path/CAM
Topic: Waterline milling update
Replies: 39
Views: 3083

Re: Waterline milling update

Hey Chris :D . I think I'm onto something worth exploring further here. I tried a 3rd strategy. I made an offset mesh per endmill tool shape, and used the projection onto it. It quickly generates tool paths where the tool tip should be. I was momentarily perplexed because one side is imperfect at th...
by JoshM
Sat Mar 09, 2019 5:00 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 39
Views: 3083

Re: 3d surface milling update

Thanks to @JulianTodd, I've explored this a bit further. I have a hacked up script--attached--that has allowed me to play with mesh offsetting. It takes a minute or more to run the attached model. This is not optimized. In short, a 2d Path-FeatureArea is attached to the stock top. The wire is discre...
by JoshM
Wed Feb 27, 2019 11:05 pm
Forum: Path/CAM
Topic: LibLathe - Lathe Path Generation
Replies: 26
Views: 2711

Re: LibLathe - Lathe Path Generation

Here's another job model to test against.
by JoshM
Tue Feb 26, 2019 2:06 pm
Forum: Path/CAM
Topic: LibLathe - Lathe Path Generation
Replies: 26
Views: 2711

Re: Lathe Features

Hi Dan, Glad that works for you. I'll try to come up with more models for you to work with. On G94, what I meant was that GCode allows movements that are absolute--ie. G0X0Y0F100--and relative to time (Feed Rate). G94 shifts it from distance per unit time feed rate to linear distance moved per rotat...
by JoshM
Sat Feb 23, 2019 6:44 pm
Forum: Path/CAM
Topic: LibLathe - Lathe Path Generation
Replies: 26
Views: 2711

Re: Lathe Features

Hi Dan,
Attached is a model representative of a typical mixed lathe/cnc job, to play with.
lathe_job_0.png
lathe_job_0.png (270.52 KiB) Viewed 470 times
It's largely a lathe job, but has other features that make it not entirely symmetrically radial.
Best,
Josh
by JoshM
Tue Feb 19, 2019 2:12 pm
Forum: Path/CAM
Topic: Creating CNC roughing and finishing passes
Replies: 103
Views: 5772

Re: Creating CNC roughing and finishing passes

Hi Herb, Couple of things: 1--Nothing that I'm suggesting addresses Finish surfaces, only Roughing. 2--What you show is the effect of the step-down and step-over sizes which are large as shown. In all cases--even with "true" 3d path generation, the result is an approximation of the model. If the ste...
by JoshM
Mon Feb 18, 2019 10:57 pm
Forum: Path/CAM
Topic: Creating CNC roughing and finishing passes
Replies: 103
Views: 5772

Re: Creating CNC roughing and finishing passes

Well, if you like Chris's example--and, I do as well--but, you don't like the iterative aspects of it, then try buying what I'm selling :lol: Here's a cut resulting from an example Cone, that I then used as a cut-tool on a larger cylinder. ConeCutExample.png Easy-Peasy, so far. Then, I made a Job in...
by JoshM
Mon Feb 18, 2019 2:20 pm
Forum: Python scripting and macros
Topic: translate a point with a vector direction.
Replies: 4
Views: 252

Re: translate a point with a vector direction.

Is there already a tool (with GUI) for "translating" stuff in general? Not sure. I suspect from a GUI use standpoint, there exists placement for each object. If you double-click on an object, you can edit the translation and rotation increments, but it's not clear what this affects. One thing that ...
by JoshM
Mon Feb 18, 2019 2:06 pm
Forum: Path/CAM
Topic: LibLathe - Lathe Path Generation
Replies: 26
Views: 2711

Re: Lathe Features

Hi Dan, Not sure what code interests you, but you're very welcome to anything I can offer. I have essentially zero practical lathe experience--limited to turning small parts in my CNC spindle. It is a fascinating endeavor you've taken on, and I'm happy to bounce ideas if nothing else. Something that...

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