one transformed shape done not intersect support on revolution

[cappu]

Hello, I try to design a bearing. At using the "polar pattern feature" in part design for a "ball" at z-axsis, I get an error: "one transformed shape done not intersect support". The "balls" are displayed correct in red, transparent color. But I can not press ok because of the error.
There are many posts with this error message, often for holes. I am not sure if it is the same problem.
I use
OS: Ubuntu 18.04.1 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.15806 (Git)
Build type: Release
Branch: master
Hash: 18b5f238ae53e3c19cb6e985f450a098dc0d6d23
Python version: 2.7.15rc1
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedStates (en_US)

Sometimes a work-arround is described, but unfortunately I do not understand or it does not fit. It would be nice, if s.o. could help me.

[meme2704]

Hi
I think that in this case the circular repetition of Partdesign Wb does not work, it is necessary to use Polar Array of Draft Wb
or use Multitransform of Partdesign Wb, but is not not my glass of wine (egal cup of tee in french )

[cappu]

Thanks for answer. So it it is a bug?

[rstech]

Should this not be considered an polar array of parts instead of a feature? (because the "balls" do not intersect with the core they will become loose bodies).Then you should use an array of (loose) parts in assembly mode.

[Forthman]

Hi,
the "polar patern" in the part design workbench works only in one body
an a body can't be made of multiple shapes.

you have to use draft workbench

Windrad_MKII_Kugellager bis.FCStd

(370.36 KiB) Downloaded 41 times

[cappu]

Hello, thanks all for tips and explanation. It helped me much to understand. Thanks!