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)
Using the part design workbench.
I am having some trouble pocketing an involute gear with an offset version of itself to make it partially hollow and then exporting as a STEP. I seem to be able to create the model in freecad but then when it exports to step there appears to be a problem.
I was not able to create an involute gear using the part design thickness tool - when trying to do this with an inward thickness it failed.
I then moved on to use the part workbench and used the 2-d offset tool to create a smaller version of the gear outline, add this back to the part design model as a shape binder and then used this as the source to pocket the gear - see enclosed file.
This appears to work.
However when I then exported to a STEP file I get the following error.
18:04:19 Traceback (most recent call last):
File "<string>", line 4, in <module>
<class 'OSError'>: Cannot open file 'C:/Users/mjano/Desktop/gear pocket.step'
The file is still output (or partially output) but the pocket would not render - step file enclosed.
Questions:
1 - Can I do this using the part design workbench only rather than a combo of the part design and part work benches
2 - what am I doing to cause the step export to fail
thanks
Mark
Part Design workbench - pocket involute gear
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Re: Part Design workbench - pocket involute gear
Hi and welcome to the forum!
I would do the cut in Part workbench.
Please retry the step export in 0.20.
I would do the cut in Part workbench.
Please retry the step export in 0.20.
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Re: Part Design workbench - pocket involute gear
I believe this to be the version of OCC with the step export bug.
Re: Part Design workbench - pocket involute gear
Hi mjanoska, greetings to the Community!
Here is an example of how it can be done, note that the offset dimension must be feasible, that is, achievable otherwise it will generate an error and the object will disappear from the view.
The animated * .gif show the flows for the external and internal offset.
In the * .gif for the internal offset there are two inconsistencies that generate the most common errors: for example, a missing connection and several unverified coincidences; it is also shown how to intervene, in this case, to correct these inconsistencies.
- Attachments
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- Profile_gear_offset_int.FCStd
- (734.61 KiB) Downloaded 12 times
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- Profile_gear_offset_ext.FCStd
- (744.51 KiB) Downloaded 11 times
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- Profile_gear_ext_offset.gif (922.06 KiB) Viewed 495 times
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- Profile_gear_int_offset.gif (1011.52 KiB) Viewed 495 times