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by JoshM
Mon Jan 07, 2019 2:01 pm
Forum: Python scripting and macros
Topic: Help wanted for scripting an "epicycloid" for sketcher
Replies: 41
Views: 1066

Re: Help wanted for scripting an "epicycloid" for sketcher

You're very welcome Manuel. I used the wiki formulas from link you provided, but I folded in the constant calculation before iterating. I think the reason the fractional ratios do not work may be that the for loop steps are ints then divided for floats, but I'm not sure. I don't know about the Splin...
by JoshM
Sat Jan 05, 2019 11:22 pm
Forum: Python scripting and macros
Topic: Help wanted for scripting an "epicycloid" for sketcher
Replies: 41
Views: 1066

Re: Help wanted for scripting an "epicycloid" for sketcher

Oh--that's cool. I tried it out and this should get you going. I tried it with R = 3, 5, and 15, and from wiki link, it looks correct. Epicycloid_Macro.png Epicycloid_Macro2.png Epicycloid_Macro3.png import FreeCAD from FreeCAD import Gui from FreeCAD import Base from FreeCAD import Vector import Pa...
by JoshM
Fri Jan 04, 2019 1:03 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

I've cleaned this up quite a bit, and it's much easier to try out now. I figured out how to make the BSpline shape without drawing to screen. It really didn't change time much. I have been generous with recomputes.
by JoshM
Thu Jan 03, 2019 9:21 pm
Forum: Path/CAM
Topic: Helix Contouring
Replies: 9
Views: 685

Re: Helix Contouring

Nice addition Julian!
Josh
by JoshM
Wed Jan 02, 2019 8:40 pm
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

I hear you--I've done similar for Delrin jobs. Not sure in wood if applicable, but ballnose makes less sanding. The curious thing that I've found is that there's a lot of beauty in geometry. Common available tool types--Square Endmill, Ball Endmill, Rounded Edge, Corner Round Mill, Tapered, Chamfer-...
by JoshM
Wed Jan 02, 2019 12:23 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

Hi Julian, I'm glad for your perspective, and have hoped to chat with you since you started posting. I take your point on mesh superiority, and I don't have an interest in working at an inferior approach. But, after about a year of playing with the concepts, I have found the effort engaging and have...
by JoshM
Tue Jan 01, 2019 6:04 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

And here's another example, of a relatively complex ramped shape with a 5mm square mill at 12.5%.
ToolPaths_14.png
ToolPaths_14.png (150.64 KiB) Viewed 530 times
by JoshM
Tue Jan 01, 2019 5:35 am
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

I fixed a few things--toroid basis was one. I'm very pleased how this is looking. Here's a more complex shape--a toroid at an angle, cut by sphere, cone, and cylinder. Here it is with 25% step-over: PlaneToolPaths_12.png And here with 12.5% step-over. PlaneToolPaths_12.png The process times were 121...
by JoshM
Mon Dec 31, 2018 10:55 pm
Forum: Path/CAM
Topic: Waterline milling update
Replies: 26
Views: 1472

Re: Waterline milling update

Preliminary Toroid Object looks promising. Here's an example of it in 50% step-over:
PlaneToolPaths_10.png
PlaneToolPaths_10.png (240.22 KiB) Viewed 562 times
and at 25% step-over:
PlaneToolPaths_11.png
PlaneToolPaths_11.png (254.38 KiB) Viewed 562 times
by JoshM
Mon Dec 31, 2018 9:10 pm
Forum: Python scripting and macros
Topic: {calculating BSpline?} Solved
Replies: 0
Views: 121

{calculating BSpline?} Solved

I need the functionality of the Draft.makeBSpline([points,]), minus drawing the object. I am looping through a Sliced Face, Discretizing the edges into Points, and creating points offset relative to the discretized points. Drawing the BSplines sequentially adds significant time. I've looked a bit at...

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