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by OakLD
Tue Oct 02, 2018 11:20 am
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

OK, everywhere same result. W7 tested over remote desktop, but that shouldn't matter... OS: Windows 7 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17 .13522 (Git) Build type: Release Branch: releases/FreeCAD-0-17 Hash: 3bb5ff4e70c0c526f2d9dd69b1004155b2f527f2 Python version: 2.7.1...
by OakLD
Mon Oct 01, 2018 10:21 pm
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

realthunder's fork is very different than the main FreeCAD repo. Can you recreate the issues you are reporting on 0.17 and 0.18dev? FYI, realthunder's fork is currently on 0.8.6 Sure I'll try. I have 0.17 on my W7 machine, I'll test it there on Wednesday. I'll try to install 0.17 on this W10 machin...
by OakLD
Mon Oct 01, 2018 9:27 pm
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

Maybe it's just your 3D view display tessellation settings. Default is 0.5% which will approximate curves with straight line segments. Thank you for your suggestion. Do you mean Edit --> Preferences : Part Design Section : Shape View Tab : " Maximum deviation depending on the bounding box " with de...
by OakLD
Sun Sep 30, 2018 5:25 pm
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

Or, one could use the PartDesign>InvoluteGear feature: internal_gear.JPG . This creates a sketch which you can drag/drop in a body and use this to pocket a blank disc to create a ring gear. Thank you, this tool has option for external and internal teeth. However, the "High precision" option doesn't...
by OakLD
Sun Sep 30, 2018 5:12 pm
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

know this is an old thread. But I want to emphasize, that if you substract involute gear from a cylinder you DON'T get valid involute inner teeth. I did it yesterday, but it was too quick thinkging. The result could be acceptable for some info graphics, but certainly not e.g. for 3D printing a real...
by OakLD
Sun Sep 30, 2018 12:45 pm
Forum: Help on using FreeCAD
Topic: Planetary Gear Inner Gear
Replies: 24
Views: 2085

Re: Planetary Gear Inner Gear

I know this is an old thread. But I want to emphasize, that if you substract involute gear from a cylinder you DON'T get valid involute inner teeth. I did it yesterday, but it was too quick thinkging. The result could be acceptable for some info graphics, but certainly not e.g. for 3D printing a rea...
by OakLD
Sun Sep 30, 2018 12:43 pm
Forum: Help on using FreeCAD
Topic: How do I design Gear ring with external and internal teeth
Replies: 4
Views: 427

Re: How do I design Gear ring with external and internal teeth

hi dave What are you trying to do? form 1 or form 2? Hi meme2704, the picture quality doesn't give me precise answer, but the inner teeth in you picture are not real involute teeth? Are they result of substraction of involute gear from a cylinder (thus invalid)? In case they are valid inner teeth, ...
by OakLD
Thu Aug 16, 2018 1:19 pm
Forum: Assembly
Topic: Assembly3 preview
Replies: 1214
Views: 93403

Re: Assembly3 preview

...you can do that by wrapping the array in a sub-assembly. For draft array, you need to set its `ExpandArray` property to true to make its element freely movable, so that they can be constrained individually. I'll try that. I used Draft WB Array command , since other array methods (Part Design WB,...
by OakLD
Thu Aug 16, 2018 7:26 am
Forum: Assembly
Topic: Assembly3 preview
Replies: 1214
Views: 93403

Re: Assembly3 preview

I've been testing (and still am) the 0.8.1 since the release date and it seems to me like a giant leap forward! Great job! And there's 0.8.2 already... :-) I found some minor , low priority issues: 1) Array cannot be constrained (or I did not find a correct way to do it) ASM3_ArrayErr.PNG Traceback ...
by OakLD
Wed Aug 15, 2018 10:45 pm
Forum: Assembly
Topic: Assembly3 preview
Replies: 1214
Views: 93403

Re: Assembly3 preview

Jee-Bee wrote:
Wed Aug 15, 2018 10:00 am
but i guess multiple bodies still not working ...
.
Well, it depends on definition of "multiple bodies". I did FEM analysis on welded assemblies in FC 17. I used some solid boolean commands from Part WB to get one object to mesh. If used correctly, it provides valid results.

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