can't create a toolpath for a fillet

[CADdy57]

Hi all,

how to mill the fillet? I would have wanted to do this with a 6mm ball end mill, but can't find a strategy that works. Either no milling path is created, or it is wrong or inside the part. Would anyone have a tip for me?

Kappe2.png (57.54 KiB) Viewed 2031 times

Peter

[onekk]

Please Post FCSTD file, maybe with the file, someone could help, even checking the generating geometry and check if maybe there are some problems.

Plus as Path WB is evolving, please post also the info requested in:

http://forum.freecadweb.org/viewtopic.php?f=3&t=2264


Regards

Carlo D.

[CADdy57]

Hi Carlo,

sorry. I've forgotten the fcstd-file. Here it is:

WLS-Schutzkappe.FCStd

(94.57 KiB) Downloaded 31 times

...and the infos about my FreeCAD:

OS: Windows 10 (10.0)
Word size of FreeCAD: 64-bit
Version: 0.20.26375 (Git)
Build type: Release
Python version: 3.8.12
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.3
Locale: German/Germany (de_DE)

There are two tasks. The first is milling from the other side. Job001 is the job with the fillet where I can't create a path.
I rotated the Model-Body001 180° to set the zero point to the right side.

Peter

[Steveco]

A waterline operation worked well for me:

WLS-Schutzkappe_Waterline_Screenshot_20211214.png (85.32 KiB) Viewed 1868 times

New file:

WLS-Schutzkappe_Waterline.FCStd

(143.17 KiB) Downloaded 50 times

Notes:
1. Waterline toolpaths are limited by the Bound Box, so I changed that to Stock and then increased the size of the Stock in the Job setup.
2. I set the operation Final Depth so that the toolpath would just cut the fillet.
3. Reducing the Sample Interval to 0.2mm gave reasonably smooth curves without long computation. I would probably reduce it to 0.1mm once everything else was set up correctly, just before generating the GCode.

My FreeCAD is a bit behind, but I don't think that matters.

Code: Select all

OS: Ubuntu 20.04.3 LTS (Trinity/trinity)
Word size of FreeCAD: 64-bit
Version: 0.20.25645 (Git) AppImage
Build type: Release
Branch: master
Hash: 37d9757399b4c2ec30318eb88d7cd7c508246345
Python version: 3.9.7
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: English/United States (en_US)

HTH,
Steve

[CADdy57]

Thank you Steve,

it works very well. I think, this is the function after all:

waterline.png (31.93 KiB) Viewed 1832 times

I had tried this before, but never got a usable result. I'll just have to test this again.

Thanks a lot
Peter

[CADdy57]

I think I have made a mistake. That wasn't "waterline" at all. I have now checked "Enable OCL dependent features" in the settings and now "waterline" is also available for selection.
Nevertheless, thanks Steve, without your file I would not have come on it.

path2.png (14.04 KiB) Viewed 1788 times

Peter

[Russ4262]

Evening,
Here is your fillet cleared using 3D Surface. The main properties changed are Boundary Adjustment, Internal Features Adjustment, Internal Features Cut, Cut Pattern, and Pattern Center At.

Step Down = 2.5 mm
Step Over = 10 %
Sample Interval = 0.5 mm

Cheers,
Russell

OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/United States (en_US)

[CADdy57]

Hi Russell,

thank you very much for your help. I have downloaded the file and will look at it right away. I am still quite new to FreeCAD and have a lot to learn and understand.

Peter