FreeCAD: Understanding how Datum Planes and Datum Lines Work With Grooves and Revolves
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- เผยแพร่เมื่อ 16 พ.ค. 2024
- Understanding how Datum Planes and Datum Lines work together and can be used in Grooves and Revolves in FreeCAD 0.19 and above. We will use datum lines for reference axis and datum planes to create geometry to surfaces especially awkward shaped surfaces such as curves. We will be using the part design workbench and adding datum planes and lines to planner and non planner surfaces. We learn how the attachment modes work with edges, faces and vertexes. We understand how we can change the location and attachment of the datum objects. We will then move onto creating grooves and revolves and how to use them with the datum objects.
#FreeCAD , #CAD , #Python , #3D , #3DPrinting, #CNC
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Because of you, I become lovers of FreeCAD.
Thank you very much.
Great to hear 😁👍👍
One of the best videos about Datum Planes and Datum Lines I've ever seen here on youtube. Nice work!
Thank you, glad you like 😊👍
Awesome Still learning!! its called experience, Thank you
Thanks. Very informative.
Great video, greater expertise used to create it so seemingly effortlessly and simply. Thank you for taking the time to share your knowledge in the way that you did. I certainly needed it.
Thank you for your kind words 😊
Best explanation of local CS in Freecad I could find. Great job!
Thanks! 😊
Thank you
Excellent video! You do a great job in explaining these basics on manipulating the tools. Thank you.
Great to get some feedback, and thank you once again.
Excellent vid :)
( JOT - planner surface => planar surface)
Very nice video…..love your ability to show application of the part design tools/functions.❤
Thank you
Wooooo todays learning done... thanks again for creating these videos !!
My pleasure! Great to see you still enjoying them.
Thanks a lot!
Outstanding tutorial of outstanding features! thanks
Thank you
This is definitely "The Video" on Datum Lines and Planes, much appreciated.
Could you please make a video to demonstrate local coordinate system placements and their usage?
Thanks in advance
Thank you for the comments, great to get feedback. I will add that to the list as it will be a great addition and very useful
Great teacher....love it....Thanks
Thank you 😊
Thank you for this video and tutorial: I consider this to be one of the best examples of how to teach an important subject in such a comprehensive and eduactionally outstanding manner.
And your voice is a real pleasure listening to.
Thank you for your feedback and such a kind comment. Much appreciated 😊😊
Attaching a datum plane to a face, and then start a sketch on that datum plane, wouldn't that bring you into the topological naming problem as soon as that face gets renamed if previous stages alters the number of faces?
😲😲😲thanks you
Very interesting, but the hole drilling part beginning at 19:43 seems very strange to me, because you selected to move the datum-plane in the "Z" direction, but the Coordinate-System arrow shows that you moved the plane in the 'Y' direction.
I'm very confused there.
But not only because of that, but also why it does make the hole when you move the datum-plane away from the hole that you want to drill, and not by moving the plane towards where the hole should be🤨
I don't get it, and that Is unfortunately pretty often the case for me in this Software.
It's just not intuitive at all imho.
thanks again,good videos
Glad you like them!
Is that Mapping function available on X-Y (etc) planes like where you created the initial sketch? (That would have fixed the negative direction hole issue I was mentioning on the offset video, unless that would have flipped the offset tracing.)
It's is available on the sketch as well, I am going to have a look back through the comments to remind myself. Sorry I get quite a few.
do you know if its possible to draw a line in sketch, and then the angle in degrees pops up, whether you can "lock" a certain angle. In inventor you can use TAB to switch to the angle and then you can say well 45' TAB again and then draw the line to the length you want.
you can also just put a line point somewhere and then just fill in the length of the line and the angle and its draws it.
I have some major issues in FREECAD to just simply sketch things. Points of 2 lines very close together do not snap on and connect with each other. If I draw a sketch on an existing model it does not wanna extrude. its just such simple basic things that are a complete headache in Freecad that just work in other CAD pograms.
I can see you are brilliant but I don't always follow what you do with the mouse and all the short cuts you use. What is your preferred navigation setting on the Mouse ?
Thanks!
Thank you so much, much appreciated
Cool!! Like your videos..
Glad you like them!
you are amazing
Thank you 😁😁
At 8:18 you said "we may have to jut this sketch out slightly" but ultimately didn't. Had that been necessary how would you have done it, given that the sketch is attached to the external geometry line?
Hi, yes sorry I should of really covered that. I would of had to change my constraints against that line to offset it with a distance constraint against the top or bottom import vertex. An example of when you would u have to do this is if the shape of your body is of such that a pocket or groove will cause a void in the body which splits it in two sepreste pieces which is not supported in the part design (but is in the part workbench). In this instance we are fine. If theere was a ridge in the middle of the cylinder then that ridge would of been disconnected creating a multipart single body and causing an error.
20:02 you move the plane in Z axis but I don't understand why it isn't X or Y. shouldn't Z move it to the TOP or BOTTOM? Your view cube shows moving in Z is towards REAR.
It's all to do with local and global co-ordinates. When you attach a sketch, datum plane etc you are attaching it to the base object but it still keeps its co-ordinate system. This is know as local co-ordinates. So with a sketch attached to the face the Z axis will always be normal to the sketch. It can get confusing and I am creating a video regarding it.
Can one use the datum to add a curve to the profile of letters?
So are you looking to say attach a datum plane to the text and sketch a profile on the plane to sweep it around the text like you was creating, say, a neon light tube? In that case yes. I did something similar a while back....actually, I don't think I ever released that video.
Or is this to get around filleting issues with a subtractive sweep?
Is it possible to make a assembly with datumplane to datumplane?
I heve never tried it, what are you looking at to achieve?
@4:41 it appears that if you define the Datum plane "Normal to the edge" it means that the center of the defined Datum plane was moved to the end of the edge, even though there is no preview of that change and the plane still looks like it is at the center of the cylinder. That is quite confusing. It would be much more clear, if the local LCS axes were visible and reacting with preview to any change you make in Attachment Mode table, before executing...
Also: @~12:36 using datum line in a Hostory tree's previous command(grove) runs counterintuitive to usual History tree function of dependency. You should not be able to define or rather execute a command using geometry, which was defines later, I could see more logical to define the datum line and then move it in History tree before the Grove command and then execute the Groove command. It would be more in line with usual logic.
I must be tired because this video confused me even though it looks easy.
Thank you
You're welcome