As always excellent !!! I specifically like Your style of explaining beforehand in broad terms what You are about to do, as well as mentioning alternative ways to solve the same tasks... Gold content for prospective FreeCad'ers :) Best regards
These beginner videos are SO GREAT, thank you! I do wish you'd explain a few things, though: What the hell does "Inertial CS" mean, and why would making that arc in the sketch tangent to the other one you pulled in as an external geometry "cause problems," as you said?
"Inertial CS: Inertial coordinate system, constructed on principal axes of inertia and center of mass" you can read this briefly as he mouses over it. If you look up "Inertial navigation system" on wikipedia you can get an idea of what it's based on but basically as far as I understand it seems to be a system that takes into center of mass, angular velocity, and a bunch of other variables. Basically it's a bunch of high level maths and science that allows for more advanced control in a 3d space rather than being limited to just Cartesian coordinates. I could be way off on this but that's what I could parse from what little information there seems to be on it. As far as the problems that he is referring to I think what he is referring to is that if you created it tangent to that arc then if later on down the line you do something that changes that arc it can have ripple effects that can often lead to your object no longer being 1 solid object as is required when working in the Part Design bench. I'm sure he'll get to your question eventually but I just figured I'd try to help :)
I love this series! Although I've been using FreeCAD for some time (although I don't consider myself proficient yet), I've learned more than I expected when I started this series. At about 13:30, where we remove the excess sphere material, you could Pocket 'Up to face" and select the face on the far side of the arched base rather than using a dimension. Presumably, that way if the extrusion length of the base changes, the pocket depth would change with it. As for creating the pocket sketch on the face of the base, has the TNP been resolved such that this is now considered safe? I ask because I had a project break after adding a feature to a base object a few weeks ago (using the then-current dev version which reportedly had the TNP fix).
The dev version changes all the time with regards to the TNP, always check with the latest version and if the problem persists open a bug in the github page. Regardless of the status of the TNP (which is improved massively in the last month). My advice is that even though the TNP might become a thing of the past for common cases, it is better not to depend on it being solved for you and still put some thoughts into how the model is built to prevent it in the first place.
Hopefully some day we'll be able to use reference geometry in sketches as regular geometry while keeping the reference, so you don't have to create duplicate entity over it, which on a bspline, would be far more difficult to do depending on the original reference. Yup, normally use other ways, but direct reference is the most intuitive way.
I'm curious why you drew a second arc around 13:00 instead of removing the construction geometry attribute from the external geometry? It'd also be interesting to see you create the dome with other tools/workbenches in FreeCAD.
I came to see if you had some lessons with the RC1 and watching this want to ask if and where back in your videos the Version 0.22 was close enough that I could use it to transition to the new RC1? I have only recently moved from 0.19 to 0.21. I stayed with 0.19 because there were so many excellent tutorials in 0.19.
The previous versions tutorials are still valid for the newer versions. They are add-ons to your knowledge. The new tools in Sketcher wb just make your tasks easier to be accomplished and the reduced TPN events too. Be careful because an old model once open and saved with RC1 no more is able to be reworked/adjusted with older versions.
Great. Thank you 🙂
You're welcome 😊
As always excellent !!! I specifically like Your style of explaining beforehand in broad terms what You are about to do, as well as mentioning alternative ways to solve the same tasks... Gold content for prospective FreeCad'ers :)
Best regards
Legend
Subscribed. Thank you for the great tutorials.
These beginner videos are SO GREAT, thank you! I do wish you'd explain a few things, though: What the hell does "Inertial CS" mean, and why would making that arc in the sketch tangent to the other one you pulled in as an external geometry "cause problems," as you said?
"Inertial CS: Inertial coordinate system, constructed on principal axes of inertia and center of mass"
you can read this briefly as he mouses over it. If you look up "Inertial navigation system" on wikipedia you can get an idea of what it's based on but basically as far as I understand it seems to be a system that takes into center of mass, angular velocity, and a bunch of other variables. Basically it's a bunch of high level maths and science that allows for more advanced control in a 3d space rather than being limited to just Cartesian coordinates. I could be way off on this but that's what I could parse from what little information there seems to be on it.
As far as the problems that he is referring to I think what he is referring to is that if you created it tangent to that arc then if later on down the line you do something that changes that arc it can have ripple effects that can often lead to your object no longer being 1 solid object as is required when working in the Part Design bench. I'm sure he'll get to your question eventually but I just figured I'd try to help :)
Thanks!
Thank you 👍👍👍👍
Thank you.
I love this series! Although I've been using FreeCAD for some time (although I don't consider myself proficient yet), I've learned more than I expected when I started this series.
At about 13:30, where we remove the excess sphere material, you could Pocket 'Up to face" and select the face on the far side of the arched base rather than using a dimension. Presumably, that way if the extrusion length of the base changes, the pocket depth would change with it.
As for creating the pocket sketch on the face of the base, has the TNP been resolved such that this is now considered safe? I ask because I had a project break after adding a feature to a base object a few weeks ago (using the then-current dev version which reportedly had the TNP fix).
The dev version changes all the time with regards to the TNP, always check with the latest version and if the problem persists open a bug in the github page. Regardless of the status of the TNP (which is improved massively in the last month). My advice is that even though the TNP might become a thing of the past for common cases, it is better not to depend on it being solved for you and still put some thoughts into how the model is built to prevent it in the first place.
Yes, TNP will be fixed in 1.0. Please make a bug report, if you still run in this problem with the latest rc.
Hopefully some day we'll be able to use reference geometry in sketches as regular geometry while keeping the reference, so you don't have to create duplicate entity over it, which on a bspline, would be far more difficult to do depending on the original reference. Yup, normally use other ways, but direct reference is the most intuitive way.
I'm curious why you drew a second arc around 13:00 instead of removing the construction geometry attribute from the external geometry?
It'd also be interesting to see you create the dome with other tools/workbenches in FreeCAD.
I came to see if you had some lessons with the RC1 and watching this want to ask if and where back in your videos the Version 0.22 was close enough that I could use it to transition to the new RC1?
I have only recently moved from 0.19 to 0.21. I stayed with 0.19 because there were so many excellent tutorials in 0.19.
The previous versions tutorials are still valid for the newer versions. They are add-ons to your knowledge. The new tools in Sketcher wb just make your tasks easier to be accomplished and the reduced TPN events too. Be careful because an old model once open and saved with RC1 no more is able to be reworked/adjusted with older versions.
@@LFANS2001 Do you mean back to version 0.21 or 0.19. I feel I am noticed differences but am still very new to 0.21.
Can't you attach a subtractive sphere to your existing additive one?
Yes you can, but you still have to adjust the z-direction. You could also attach both spheres to the curved face instead of the two edge-points.