FreeCAD Beginner Tutorial #3
ฝัง
- เผยแพร่เมื่อ 1 มิ.ย. 2024
- FreeCAD Tutorial for beginners using the PartDesign workbench in FreeCAD 0.21.2.
FreeCAD Download Link: www.freecad.org/downloads.php
Reference Image Download Link: grabcad.com/library/50-cad-ex... - แนวปฏิบัติและการใช้ชีวิต
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At the 0:57 mark I mention that I have auto constraints enabled, I'd like to also point out that I have 'Auto Remove Redundants' enabled. If you don't have that enabled you'll run into a redundant constraint error around the 2:24 mark.
Yep noted this as I couldn't get it to work. Unaware that autoremove must be turned off, I found a way to move on. I set a horizontal distance between the center of the large semicircle and the X axis to 0 mm. Then everything ended up right and FreeCAD was happy with green everywhere. But thanks for the input that autoremove must be on. Your videos are so good, one learns those little details...Cheers
Dude, you are an EXCELLENT instructor. Coming from a guy who made a living teaching CNC machine\programming\MasterCAM, you have a real talent. Thank you for this, with all sincerity.
Thanks, I ran through the first two. so its great to see your adding to the lessons list!
Thank you for the feedback! I'm glad to hear these videos have been helpful. I plan on adding more videos to this series in the near future.
Very easy to follow tutorial! And those CAD Exercise drawings look ideal for practising with :-)
Its the first video I have seen however that looks a very easy lesson to follow
Incredible tutorial and I like the way you explained things.
Please keep making videos on freeCAD.
Good mojo! I'm learning a lot from you.
Looking forward to more insightful tutorials from you in the future!
Thank you very much. So easy to follow.
Another great one you are the best freecad teacher I have found thanks
I've been trying to learn FreeCAD from a ton of different TH-cam videos. Yours have been the most concise and have really helped get me moving in the right direction. Thank you!
Easiest tutorial yet! I can't wait to start my projects.
Total newbie here. Man, you're the Bob Ross of 3D design! Thank you so much for walking us through the steps!
Doing some great videos and well explained for beginner's Thank You and keep um comin !!!.😀😀👍👍.
Excellent tutorial for someone totally new to freecad I used solid works and edge in the past was looking for an open source software.
Excellent tutorial. Thank you. Keep up the good work. 👍
Amazing instructor 🤩👍🏼
excellent guidance , thank you so much.
Thank you!
_Please load up more videos - great job there_
Another great Tutorial! Thanks
Thank you for all the after in this videos
Very helping video, thanks!
I'm glad it was helpful!
Another great one thank you.
Danke, sehr helpfull!
These are soooo helpful. Sub'd!
Love it!
Magic!
Very nice video. thanks. As a newcomer it just came to my mind, is this method of constraints (relative addressing) is a must do or it is just another method of drawing in contrast to absolute addressing? I mean I can address everything with respect to the origin or coordinates..
Question for you, when you're doing your polyline to do the body of the first shape right after the circle, the first portion comes into a constraint of a straight line. I will arc around and do my next straight line, then a vertical to close the elements. As soon as I attempt a constraint coincident, the whole body turns red and I get a redundant constraints of four. What is this caused from?
Hi, thanks for commenting! I just spent some time recreating this sketch to get a better idea as to why this happened.
First off, the reason it didn't happen to me when I was recording is because I had 'Auto Remove Redundants' enabled. At the 0:57 mark on the video I mentioned that I have Auto Constraints enabled, but I should have pointed out that I have Auto Remove Redundants enabled too. I'll pin a comment about this so others can find the solution if they run into the same problem.
As far as why constraint number 4 (the horizontal constraint on the top line) is redundant, here's my understanding of it:
Due to the tangential constraints between the end points of the arc and the end points of the lines, the line angles are affected by the angle of the arc. Moving the center point of the arc changes the arc's angle, which in turn affects the angle of the lines. When we apply the coincident constraint between the center point of the arc and the sketch origin point, we're constraining the arc's angle to exactly 180 degrees. This cause the lines coming the from end points of the arcs to be perfectly horizontal. At which point the horizontal line constraint becomes redundant.
To visualize what I'm trying to describe, you can delete the horizontal line constraint from the top line, as well as the coincident constraint on the arc center point, and then drag the arc center point around the sketch. You'll see the angle of the top and bottom lines changing as a result. When the center point of the arc is position near the origin point of our sketch, the lines become horizontal.
Hopefully that makes sense!
@@JeffCAD1 that's it! The auto constraints is what I missed. I noticed in your video that the same horizontal line you mentioned, goes away... so the system auto removes the redundancy. Very grateful for your reply! I'm trying to learn FreeCad to teach my boys so we can buy an Ender 2 V3 and they can print some cool stuff. Again, appreciate you.
Yooo! How can i set constraints across a mirrored sketch. i have base sketch and y reflection, so now i want to change the displacement between the reflection and the original. so basically the correct way to interact between two sketches of the xy plane. sorry if u already did this
Thank you. If your drawing has a multiple vertex point are they stacked?
Hi Danny,
If the points have a constraint holding them together, you can think of them as being stacked.
For example: If you had two points in your sketch with coincident constraint applied to them, the points will share the same X and Y position. Even though it looks like a single point on your sketch, under the hood it's actually two distinct points in the same position.
I hope that answers your question!
yes, thank you. Is there a way I can make the vertex nurb (dot) larger or change the color so I can see it better?
@@JeffCAD1
@@dannyperkins4220 You can go to Edit -> Preferences ... -> Display
From there you can change Marker size: to some other value to make the markers larger.
Thank you.@@callejohansson5732
When setting a diameter constraint for a radius of 20mm, given can you just type "20*2", and similar calculations?
Yes, that's right! FreeCAD allows you to use mathematical operators when entering constraint values.
When I try to make the arc centers coincident, I keep getting redundant constraints: th-cam.com/video/LRok9cRNlQg/w-d-xo.htmlsi=rlXraZbLv00yl8aU&t=139
I am on version 0.21.2 (Windows)
Problem solved: I did not have "Auto Remove Redundants" turned on.
Hi Jay, thanks for posting your solution! Glad you got it figured out.
Great tutorials, thank you!