FreeCAD for Beginners #4 Modeling Revolves
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- Опубликовано: 4 июл 2024
- We show how to create revolves, including fully constraining the sketch. We discuss when to use a revolve and how to create complex model shapes.
We demonstrate how constrain a complex sketch.
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Songs:
Raw Space by Spazz Cardigan (intro)
00:00 Introduction
01:20 Creating the sketch
04:07 Creating the first revolve
06:20 Modifying the sketch
09:05 Creating the second revolve
10:30 Using clipping planes
12:50 Constraining the sketch
24:20 Creating the third revolve
26:41 Explaining why you would use a revolve
30:55 Demonstrating the ease of creating revolves
32:41 Final Thoughts - Thanks to our patreons 
Хобби
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Great friend, in two videos you made I learned more than 6 months from other videos on RUclips. Congratulations on the way you teach.
Thank you
Don't you know
They're talking about a revolution?
Great presentation!
Lol 😁
I'm loving these videos making it easy for an old boy thankyou
Excellent, glad they are useful
Great tutorial!
Taking big chunks in mouthful bites!
👍
Excellent, thanks for the feedback
A few tips.
You might want to tell your students that CTR Z will undo a step if they mess up a step. Multiple CTR Zs will step things back one step at a time.
Another thing is that you aren't stopping to Save during your videos. If the student's program crashes, they have to start all over again. And it introduces the habit of saving your work while you work. FreeCAD on Linux seems to autosave periodically, but that doesn't mean you can't lose several steps of work. I Save every time I get a block of work done.
If I am unsure about how something is going to turn out, I will Save a Copy As before I attempt anything big. Then if it doesn't work out, I can always go back to my saved copy and try a different approach. It saves having to delete a bunch of work if you have to go back.
Good tips. - TBH I do sometimes forget to hit the save or mention that I did a Ctrl +s that saved the model.
Excellent video once again. Whenever I am struggling with anything I watch one of your videos and all becomes clear. Thanks again.
Great to hear!
Many thanks for taking the time to produce these videos. I have been scrambling up the learning curve of FreeCAD for a few weeks now and have nearly abandoned this project on more than one occasion from the frustration of things not working for me. It is the quality of your video content that has kept me going. and with the assistance of your videos the learning curve is now flatening and I am starting to produce work of an acceptable quality that can generate working GCode for both 3D Printing and CNC Routing.
I look forward to your future videos and continuing to learn from them.
Thanks again.
I am glad the videos are getting you over the learning curve.
Really appreciate you taking the time to post this. I'm optimistic that you have given me the tools to create the component I want using the revolve function.
Clear and concise instructions help enormously. Great job 👍👌
Thanks for the feedback
Agreed, similar experience for me as well.
You are welcome
It is always great !
Thanks!
Thanks, I've had a few questions that you immediately answered which has allowed me to not get frustrated and quit! I've learned a lot so far!!!
You are so welcome!
These are such great videos.
Thanks!
Good video, learning lots! Thank you.
You are welcome
Thank you very much. Your videos are very helpful
Thanks
Very Clear video. Thanks for your help and tips.
You are welcome
this is so much fun! had a little hole at the bottom and took an hour to get rid of it! :)
Oh my, what caused the little hole?
@@Adventuresincreation Object was off center. easy fix. but still a 0.0001 mm hole :)
Superb vid , answered many questions I have encountered in my trial and error method of using FreeCAD. THE WAY YOU WAITED to do all constrains answered all of the problems I have been having, I have only been using FC for a month and have a dozen or so of some quit complex parts of three inventions . Love being able to do my drawing on the computer . I have a drafting table that I have used for 70+ years. Your vids are complete, informative. And very easy to follow, Thank you Sooooooo much Larry Jones
You are welcome Larry.
Hot stuff!!! Thank you!
Glad you liked it
Glad you liked it
I've been using FreeCAD for a few months now and I really prefer it to OnShape, especially because it's free. Thank you for taking the time to make these videos. Coming from Blender, the revolve looked east before I had to constrain the model, but now I see you running into the same error messages as I get and how to get around them.
Glad it helps
Good video
Thanks James.
Love your videos. The past vids on datum planes and spreadsheets were awesome. (This one too!) I was wondering how you would take an image and design the complementary shape in a way that allows you to dial in the measurements easily? I just did the slots that slide into an 2040 extruded aluminum bar on my printer. Now I have to take that and combine it with the storage box I made. I look forward to learning how I could have done it better.
Glad you like them. I am not sure I understand what you are trying to do. When you say, "take an image" do you mean .png or .bmp image? Or are referring to something else?
nice video
Thanks
I remember that Solidworks and Katia had the shell command for creating the void space. Of course those programs are very expensive.
Yeah, for "free" FreeCAD is a fantastic tool but some of the commercial tools have a more streamlined approach. I used to use PTC's Pro-Engineer, that was ahead of it's time back then.
FreeCAD has the 'Thickness' modifier in both the Part and Part Design workbenches. I just used it to create a hollow part from a revolution of a complex shape - it will create a constant thickness shell. For a shell with variable thicknesses you will have to use the procedure in this video.
Thank you for your videos on FreeCad. I am on the slippery slope of learning!
I am trying to model a crossbow arrow. I have managed to create the shaft using part design, a cylinder and a cone (for the point of the arrow). I can attach a box , pad it to 2mm and using Boolean to fuse it in the right position of the shaft. However, I want the arrow flight to look like a delta wing (isosceles triangle) and not a rectangle. I do not know how to "attach" the triangle to the round shaft of the arrow. Please can you assist me. Thanking you in anticipation. Barchiq
If you are using boolean operations to create it. Just create a sketch of the isosceles triangles and then pad it, then use a boolean add to place it wherever you want it on the arrow shaft.
Great video. I'm surprise this program does'nt have the shell command to create the void space.
If you go into the Part workbench there is a similar tool however, with a revolve it's probably better to draw the cross-section that you want.
Thanks for your excellent tutorials. Very nice to 'play' along in Freecad with your videos. One question, my FreeCAD doesn't seem to indicate partially constraints parts in Sketcher. How do I turn this feature on?
It's a new feature in 0.19 are you using that version? If so, it should be on automatically.
Thank you for the content, I appreciate it. Would the Thickness Tool also work to get a hollow shape?
Yes, the thickness tool works well for hollow shapes
Thanks for the video.
Unfortunately there are too many bugs in this software to waste anymore of my time trying to learn it.
Sorry to hear that James. They are improving it rapidly, maybe check it out in the future.
Love your videos, however there is something missing (from my point of view anyway) I think there should be an early video in this series that talks about work flows, with an emphasis on what are the inputs and what is the output. for example I want a 3d printed part the input would be a pencil sketch the output would be a file that can be 3 d printed or you may want to get something made at a machine shop so once again the input would be a sketch and the out put would be an engineering drawing that a machinist can work with. I have worked in industry for a long time and always had a drawing office where I would take my sketch, and out would come pcb design or equipment enclosure design. I was never taught drawing (other than tech drawing at high school or circuit drawing at tafe) Now i'm retired and have to do a lot myself, I had to learn to be a draughtsman (or is that draftperson in the politically correct world FIIK) So I think a big picture video would be a good idea. regards Steve W
Thanks Steve, FWIW there is a video on creating drawing too
It’s gonna take awhile to get used to all of these icons. Especially when so many look alike. Isn’t there an offset command? That would have been a lot easier to create the inside wall of the vase.
There is a macro that can do offsets but there is no native command at the moment. - I have used a lot of CAD systems in the past and the offset is something you see in most. The macro is generally available and works well.
Excellent video.
BTW, could you explain where the center of rotation for a view is when moving it with the middle mouse button ? Is there a way to set it ? Last click point or something ?
Great video.
So, it depends where your mouse pointer is located at the time that you hit the middle mouse. One of my patrons very kindly sent me a spacemouse, that thing is fantastic for rotating the model.
@@Adventuresincreation I keep hearing this. I wonder how a trackball would be.
@@SomeTechGuy666 I have a logitec trackball, I love it.
@@Adventuresincreation What does it do better in CAD than a mouse ?
The main thing I dislike in FreeCAD is holding down the middle mouse button (scroll wheel) and moving the mouse around to rotate an object. How does the track ball handle this and how does it compare ?
How does the position where you start the rotation from alter the center of rotation ?
@@SomeTechGuy666 You still hold the button but rotate with your thumb. The spacemouse is very different. It is designed just to manipulate the model
I am new to FreeCAD and CAD in general. I am using release 19.I have drawn a simple part using revolve which comes out as expected. When I create a new sketch using a datum plane the revolved part disappears. When I do the same operations with a padded part everything works as expected.What am I doing wrong?
When you create new parts/bodies the existing ones will be hidden, you can select the part in the model tree and hit the space bar this will toggle its visibility
Is there an offset command? I'm imaging creating a line, then creating a parallel line following the one you just made?
I only seem to find a copy command which worked some, but it is a "free" Cad...
There is a macro that creates offsets but there is no native offset command (yet)
Hi ,problems with the next drawing..lol. I do the drawing up to the revolve, when I hit revolve the drawing disappears and I'm left with the axis plane star. Any Ideas?? Could there be something wrong with my program? Thank you for all your help. I have just tried again and now it will work, I don't understand why it works sometimes.
That usually means you don't have a closed profile
Can features like text be added to the surface of a revolve?
Yes, they can you need to use the project face feature in the Part workbench.
@@Adventuresincreation Thanksfor the reply
83x64x102 at layer .16mm with infill at 10% speed 50/100 print time: 6 hours 15 Mins...
Wow! that's a long print but the nature of the 3D printing beast I am afraid.
@@Adventuresincreation Another project I started since I got my QIDI Tech x+ printer is to build a custom camera mount. Happy to say I finished it and mounted it with somewhat success (replaced a Logitech 920 mount attaching the new mount to the old holes used for the mount -- yes starting out big). The question I have for you now is if you have done any videos yet on importing STL or other files into projects. For the most part I was able to use the Spreadsheet for all needed demotions yet ran into issues with the imported object.
@@OZtwo I did a video on importing STEP files.
@@Adventuresincreation Cool I will get back to them when I get this camera mount project done. :) But more or less learning on the fly right now. All works GREAT just need to get the dominations right for the mount itself. So yes, the CAD mount is done and ''working" with the spreadsheet data. You been a GREAT help.
Why do you not use the 'M' key with Polyline rather than changing tool to make curves?
There's always more than one way to skin a cat 🙀 Graham.
@@Adventuresincreation Ain't that the truth!! :-)
BUT the only issue I have with printing here is when looking at the slicer it is showing the seam. I have a large line going from the top to the bottom of the vase. Edit: found the error, the line is the sketch itself. trying to find a way to fix the issue. It shows up in FreeCAD as an edge. (yes, have full 360 set...)
Glad you found the issue.
thanx for your time but it is very negative in freecad that there is no offset command to make this 2d drawing in 1 minute
There is a macro that will do the offset however, there is no built in command for that.
can you give me fasted file pls
From my patreon site you can get the files.
If you would get rid of your intro music or reduced your volume, I would subscribe
Ok, you do know we are on #35 right?
Beaker, is it you? Miimiiimiii...