From the Part WB part > make compound Boolean Union gives a failed fusion OS: Windows 7 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.15.4218 (Git) Branch: review-CL-Bundler Hash: 7d30060c4e9739563b14f7eddc62ee39f4b3b556 Python version: 2.7.8 Qt version: 4.8.6 Coin version: 4.0.0a ...

You could try this.

viewtopic.php?f=3&t=8562#p70730

Hello MarkEmery and Welcome to FreeCAD.

You can use the link to external geometry tool in the Part Design WB



http://www.freecadweb.org/wiki/index.ph ... r_External

If you want to keep the solids separated you can use the methods described here

viewtopic.php?f=3&t=8240&hilit=part+pla ... deo#p67503

Welcome Luis

Can you post a image of the heat sink?

I would suggest making the shorter pad, then array, draw a sketch on the pad (using external geometry to constrain it, and pad it again to make the longer one. I then used the 0penSCAD Refine Shape feature to remove the line on the newly created pad. If you are going to make other changes you will w...

New build folder OS: Windows 7 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.15.4218 (Git) Branch: review-CL-Bundler Hash: 7d30060c4e9739563b14f7eddc62ee39f4b3b556 Python version: 2.7.8 Qt version: 4.8.6 Coin version: 4.0.0a OCC version: 6.7.1 I don't know why. I deleted everything...

OK, I;ll try again. Because polar array works on a single feature. you need to array the rectangular boss, then map the circular boss to a face, then pad, then array that pad. I lost the length of the semi-circular pad, you can change it. Sorry for the bad info in my previous post. PrimeInstrumentsD...

OK
Polar pattern works on a single feature so you need to do it twice.

Also angle is the end angle, not the increment (Quick61 taught me this)

Let me know if this is not what you intended.
EDIT: I see what you mean about everything. I'll look into it.

Hello Steve and Welcome to FreeCAD PS-I am running Ubuntu 14.04LTS on another less powerful laptop...is the Linux version of Freecad somehow better and preferrable? I read something in another thread about some missing options in Windows. The auto detect OS is wrong on SF is wrong. You can get the l...