Gears in FreeCAD: FC Gear
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Gears in FreeCAD: FC Gear
I am learning about gears.
I was looking for a way to integrate gears in FreeCAD in a more straightforward way than using the PartDesign involute wizard and then doing lots of boolean operations and I found looo's Gears WB. I did not know it existed:
https://github.com/looooo/FCGear
Then I decided to fork the project and enter the Python realm to create a herringbone gear... I did most of it, until I realised that FCGear already allows you to do HerringBone gears using an involute gear and setting beta to the helix angle you want for your herringbone, and "double_helix" property to true.
I am not sure this subforum is the right place, but I wanted to make an entry to create awareness...
Thanks looo for this workbench
I was looking for a way to integrate gears in FreeCAD in a more straightforward way than using the PartDesign involute wizard and then doing lots of boolean operations and I found looo's Gears WB. I did not know it existed:
https://github.com/looooo/FCGear
Then I decided to fork the project and enter the Python realm to create a herringbone gear... I did most of it, until I realised that FCGear already allows you to do HerringBone gears using an involute gear and setting beta to the helix angle you want for your herringbone, and "double_helix" property to true.
I am not sure this subforum is the right place, but I wanted to make an entry to create awareness...
Thanks looo for this workbench
Re: Gears in FreeCAD: FC Gear
Looking good.
P.S. Usually that happens indeed. Trying to achieve something in FreeCAD and thinking likely it will take a lot of effort to do that. Only to realize there is already a command for that.
P.S. Usually that happens indeed. Trying to achieve something in FreeCAD and thinking likely it will take a lot of effort to do that. Only to realize there is already a command for that.
Re: Gears in FreeCAD: FC Gear
Wow! I didn't know that! I hadn't updated FCGear in some time. Thanks for the tip!
O/T in the CAD program I use at work, default colour for surface and shell objects is almost the exact same green as in your screen capture. When I see that green, I automatically think that the shape is not a solid.
Re: Gears in FreeCAD: FC Gear
Welcome. I like this WB a lot. Yes, I am a newcomer to gears and I am excited (probably if you are a mechanical engineer and you remember how cool you thought gears were when you studied them... well, I am that excited!).
I am going to print this one. I have used the Bevel gear object as base feature for PDN, and in PDN I have made the shaft, cut the gear to size with an angle, and then I made a connection for a small dc motor. For a while I wanted to see if draft clone worked on bodies, and it does. It is a nice alternative to making clones of the last feature, as seen in the forum.
Re: Gears in FreeCAD: FC Gear
Why do you need a Clone here?
Re: Gears in FreeCAD: FC Gear
I don't. I only wanted to know if it was possible. Here it is not needed.
I have seen that other users use clones for producing several copies of a part for assemblies. The cool part of using a clone of a body instead of a clone of the last feature of a body, is that if you change the body by adding another feature, the clones will follow automatically.
Re: Gears in FreeCAD: FC Gear
FYI,
EDIT: I wrote "almost", because as usual there are exceptions to the rule.
FYI, there is almost never a good reason to clone the last feature of a Body, or use it in an operation in another workbench. It's a mistake, and it will produce a "Links go out of allowed scope" error. With the introduction of the Body, features inside it should no longer be selected, unless when working within the PartDesign workbench.
EDIT: I wrote "almost", because as usual there are exceptions to the rule.
Re: Gears in FreeCAD: FC Gear
Nice. For molding this is a good find. I've used draft clones + scaling to account for shrinkage.
"fight the good fight"
Re: Gears in FreeCAD: FC Gear
I see. Many of us are still to adapt to the "links go out of scope". Thanks for the tip!NormandC wrote: ↑Sat Mar 10, 2018 7:19 pm FYI, there is almost never a good reason to clone the last feature of a Body, or use it in an operation in another workbench. It's a mistake, and it will produce a "Links go out of allowed scope" error. With the introduction of the Body, features inside it should no longer be selected, unless when working within the PartDesign workbench.
Ah moulding!! Another one in my TODO list...