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FreeCAD CNC series. Aluminum extrusion modelling tutorial.
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- čas přidán 17. 03. 2021
- #freecad #diycnc #modelling
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The first video tutorial in the FreeCAD diy CNC modelling and assembly series.
In this tutorial we learn to use FreeCAD's PartDesign workbench tools like pad, pocket and polar array to model the aluminum extrusion from which the frame is built of.
Linkstage3 is a development branch of freecad used by project contributor RealThunder to test new features that hopefully will be merged with master. It is highly experimental and must be used with caution, do your backups and stuff. FreeCAD is a opensource parametric CAD software similar to Fusion360 or SolidWorks with CAD and CAM capabilities. Learn more about the project at: www.freecadweb.org/
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Absolutely brilliant! I have worked professionally in commercial 3d software for 20 years. This wonderfully clear tutorial could be used as a guide for basic best practices, not just for Freecad. Well done, sir.
Wow, this was such a nice comment to receive. It is not always easy to follow best practices while trying to circumvent software limitations especially in more complex designs. Again, thank you so much :)
I like your aluminum extrusion tutorial better than mine. ;)
Keep up the good work and spread the word about Freecad. I wish I had your fluency speaking. It would make editing videos allot faster lol
This was excellent, looking forward to more videos like this.
Love your style! Keep them coming!
Really helpful tutorial! Thank you very much!
Concise ! Bravo !
Very good. Inclusion of shortcut keys is very useful.
easy to learn from you so basic awesome!
Sensationell! Best FreeCad tut i've ever seen! 👍
Oh. Thank you for your kind words. There is always space for improvement so any constructive criticism is always welkomed :)
Excellent.
Thanks for taking the time to model real life things. A hint regarding your defaults: Obviously your Sketcher preferences differ from the default. You have checked "Auto remove redundants" in Sketcher Preferences, Tab General. By default the boxes will always turn orange when applying symmetry and the user has to clear the redundant horizontal constraints. You seem to have checked "Auto update" too. Didn't find it in Preferences, still searching ...
complimenti bravissimo nella spiegazione, grazie!
Grazie di cuore :)
So I learned that keystrokes are good. I'm going to switch to that now. Good job.
I can't live whitbought keyboard shortcuts. It makes sketching so much faster :)
@@OficineRobotica Some keystrokes won't work for me, those which use 2 keys: construction mode is one of them (C,M). That's why I used your tips on pie menu's and created a special pie menu for the sketcher
Excellent video. I like that you point out the linkstage3 features as you go along as it helps people relatively new to Freecad and learning with 0.19. While preventing swearing looking for non existent features in 0.19 it also prepares them for the transition to linkstage3 if they move to it once their skill level is sufficient. I was slightly confused why your polar patterns were made with respect to "base y" but maybe I'll understand the second time I go through the video again. Thanks again and cheers from Canada.
You are right that revolving around base Y axis was confusing. It made sense in the context of this model and might not in the context of a different positioning of the feature that you are revolving.
In this case, if you activate the axis cross (View -> Toggle axis cross) you see that the global Y axis (base Y) runs the length of the aluminum extrusion. So it made sense to revolve around that. Also, for different needs, a polar pattern can be executed around arbitrary axis, you can even chose construction lines inside sketches if that's what you need to reach your desired positioning of your pattern. So yes, it is very flexible.
Thank you for your kind words :)
@@OficineRobotica Thanks for the reply. I fully understood it when I watched your video for the second time. I also picked up on a few more nice tips as well. This video was packed with information. I ended up grabbing a pen and writing them down as I watched. There are so many hidden gems in Freecad, it will take some time to find and remember them. I followed your example and placed the sketcher constraints vertically on the left side of the screen. That was a huge benefit to me. I had them on the top under the sketcher geometry and was forever making the mistake of grabbing the radius constraint when I wanted the circle geometry and vice versa - haha. Many thanks for your efforts again. Waiting for your next video now.
good
Thanks for an excellent tutorial. I hope you will follow up with "How do I instantiate 12 such 'templates', with each instance of its own length, used to build a frame?"
I want to see something like that too. :)
thx
Excited to follow along with this series. Do you think you will also do any videos about the CNC machine beyond the CAD aspect (design considerations, part selection, performance)?
I'm actually building the thing so yes it will be a full blown series. Take a look at this twitter.com/OficineRobotica/status/1364941037442072577?s=19
Freecad and cnc coupling for simulation is gonna awesome please teach us how???
Really awesome tut sir Thanks
So, now that we have an extrusion model, how would we use FreeCAD to model something like a 3D printer made from that extrusion?
Can you make pipe extruder head ?
What program did you use to show your keyboard keys? Looking for something similar to record bug reports for the realthunder to fix :) I faced few nasty bugs while made latest model...
The program is called KeyMon ;)
Fantastic video! (But there are only 8 protrusions in the center hole 🤣)
Damn ... you are actually right . Don't worry, in the assembly tutorial we will use a simplified version of the model with allot less detail. There, take that as an engineering solution🤣
@@OficineRobotica Don't worry about it! 😁. It doesn't take anything away from the quality of the tutorial.
just wished that freecad had one bind for dimensions like the other programs especially for the most used onse vertical, horizontal, radius and diameter
I think I seen this discussed somewhere. Who knows might be implemented. None the less I find the shortcuts to be pretty fast also once one gets used to it
@@OficineRobotica yeah agreed, but i think its unecessary but i wouldnt mind if they kept the shortcuts for the horizontal or vertical but i just wish there was a simple dimension command, like in inventor, fusion etc
@@EliasNPC freecad deserves a ui update, but the "shift v" "shift h" "a" and "shift r" shortcuts are very useful, I guess even more useful than a united tool. I used to use inventor and a little bit of fusion, but right now I'm very used to freecad in linux, I feel like im doing things much faster in freecad.
How did you get that transparent kind theme?
czcams.com/video/ny31diN1ZhM/video.html Glass Addon
Is this just for tutorial purpose that you do not create final extrusion in 1st and only sketch?
Sorry, somehow I missed your comment. Although possible, in my experience it is not advisable to create such a complex shape in just one sketch. Even if one draws only one quarter of the design and then polar paterns the rest of the quadrant. And the main reasons is maintainability, ambiguous constraints and the damn topological naming problem. I'll try to explain
-maintainability- to get that shape correct dimensions one needs to set allot of constraints. I , personally, tend to set first equality and symmetry constraints then dimensions. Returning to a fairly complex design after I month or so I bet that recording what the correlation between all the constraints was becomes difficult.
-ambiguous constraints- a picture would speak a thousand words here so I'll make it short. With a complex sketch there is the possibility of setting the distance(for example) between 2 vertices and the change another dimensional constraint that drives the first one. If the upper level constraint change is big enough it can happen that the positionig of the 2 vertices from the 2 lower level constraint to get completely swapped driving everything that follows out of position. For the solver everything is correct even tough the vertices are swapped. We have set a distance between 2 vertices and for the solver is all ok either if it is left to right or right to left. Theese situations can be avoided by braking the sketch in smaller chunks and using the symmetry to origin to block points. It's also easier to keep track of things.
-topo naming- altough things are getting allot better with the new topo naming algorithm from RealThunder, in master even changing one dimension of a sketch deep whithin the tree structure could brake all the model. It is allot easier to unbrake things if everything is broken in to chunks.
Hope that made sense, anyway both approches work but I find it more elegant and maintainable to brake things a bit in to logic steps to get to the final model. I also find that if one follows the tree structure might get the design intent and steps to get to the final product a bit better. Cheers
@@OficineRobotica Thanks! Make a lot of sense, and when I think about that your way is faster in this case, even if it looks like it is not at first glance.
Yes, I also always try to "pile up" everything into one sketch. Especially when there are more parts with dependencies, there is a problem with that. I just discovered parametric input using Spreadsheet :-)