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by JoshM
Mon Dec 31, 2018 8:08 pm
Forum: Path/CAM
Topic: Waterline milling update
Replies: 39
Views: 2924

Re: Waterline milling update

Here's an example, in pictures: The Job is a sphere cut by a cylinder: Job_0.png Only the top hemisphere is able to be milled: Sliced_1.png The outline is "projected" onto the stock-top height as a 2d closed wire: StocktopBounded_2.png A Toolpath "Pattern" seed is generated--here, a zig-zag. Stockto...
by JoshM
Mon Dec 31, 2018 8:04 pm
Forum: Path/CAM
Topic: Waterline milling update
Replies: 39
Views: 2924

Waterline milling update

I've refined an approach to this that seems largely workable. The algo is quite similar to prior approaches I've looked at, with some refinements. In broad brushstrokes: 1. Bound the part of the face available to mill from top, and creating a 2d stock-top closed wire based on that shape. 2. This all...
by JoshM
Wed Dec 12, 2018 12:14 am
Forum: Path/CAM
Topic: DXF importing to use for routing and laser cutting
Replies: 4
Views: 519

Re: DXF importing to use for routing and laser cutting

I've played with Sketcher from scripting a bunch lately. I've found the DOF implementation can be finicky about the order of constraints. If the sketch begins with a template that is one possible state within the possible parametric permutations, it will work generally work well. The sketch is consi...
by JoshM
Mon Dec 03, 2018 4:33 pm
Forum: Help on using FreeCAD
Topic: Newbie: Points Workbench
Replies: 13
Views: 1564

Re: Newbie: Points Workbench

Thanks microelly2,
I'll look through links tonight. I really appreciate your insight.
Best,
-Josh
by JoshM
Mon Dec 03, 2018 2:56 pm
Forum: Help on using FreeCAD
Topic: Newbie: Points Workbench
Replies: 13
Views: 1564

Re: Newbie: Points Workbench

Thanks guys. I'm still wrapping my head around this, but the links should help. One thing I'm curious about. In some cases, people are interested in forming a surface from points, but the points may not be ordered. In my case, I am interested in a radial and/or axial offset surface. If I start with ...
by JoshM
Sun Dec 02, 2018 11:51 pm
Forum: Help on using FreeCAD
Topic: Newbie: Points Workbench
Replies: 13
Views: 1564

Re: Newbie: Points Workbench

Ok, but I don't see a way to convert 500 Draft or Part points to a surface. If you can sort these points into a 2d matrix (representing the u,v parameter range), then you could feed them to the BSpline surface approximation algorithm. I know it's an old thread, but I need to create a surface from a...
by JoshM
Sun Dec 02, 2018 3:15 am
Forum: Path/CAM
Topic: CNC Lathe and 4th-axis milling...
Replies: 142
Views: 10960

Re: CNC Lathe and 4th-axis milling...

I haven't really looked much at 4th axis, and limited 3rd axis, lately. Most recently, I've looked at using the getUVNodes() function for each face. getUVNodes() returns a list of the UV values for the Face. Parsing the list, the valueAt(u,v), and normalAt(u,v) return the vertex, and the normal at t...
by JoshM
Thu Nov 29, 2018 11:13 pm
Forum: Path/CAM
Topic: Creating CNC roughing and finishing passes
Replies: 103
Views: 5636

Re: Creating CNC roughing and finishing passes

prius06 wrote:
Thu Nov 29, 2018 7:33 pm
P.S. Actually I am seeing ocl.pyd under .../Mod/Path but for some reason it does not appear to be usable by the application... Is there something I need to do to "activate" it?
Experimental Features enabled? If not, check wiki PathWB FAQ--think it's in FAQ.

Cheers,
-Josh
by JoshM
Mon Nov 26, 2018 1:39 am
Forum: Path/CAM
Topic: CNC Lathe and 4th-axis milling...
Replies: 142
Views: 10960

Re: CNC Lathe and 4th-axis milling...

Also, on Sketcher, just my personal take, but it's mostly joy and partly misery. Sketcher gives you what you ask for, whether you realize it or not. Recently, I realized that constraining a point on an arc includes the entire circle. If you want a circle constrained tangent to the outside of a circl...
by JoshM
Mon Nov 26, 2018 1:17 am
Forum: Path/CAM
Topic: CNC Lathe and 4th-axis milling...
Replies: 142
Views: 10960

Re: CNC Lathe and 4th-axis milling...

Hi jmr, I'm sorry for delayed response. Truth told, I'm not sure. When you say tilting table, are you differentiating the job type--as opposed to pseudo lathe ops, like I had shown? In either case, the 4h axis is the same from a G-Code perspective, but the job strategy is very different. I've looked...

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