Well Chrisb, I just finished yoir newest "Master Piece", and it is positively BRILLIANT Well done!
Sketcher tutorial
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Re: Sketcher tutorial new version is now Sketcher Lecture
Sincerely,
Michael S. Olsen
Electrical Engineer & Joiner
Michael S. Olsen
Electrical Engineer & Joiner
Re: Sketcher tutorial
Thanks! And thanks for helping!
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Sketcher tutorial
I am just getting started with FreeCAD and with the Sketcher workbench and your tutorial. Thank you for all the work you have put into this. On a first note: did you intent to have these red outlined boxes in your pdf file? See picture
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Re: Sketcher tutorial
Welcome to the forum!
Those are links in pdf file. You can switch the red boxes off in the options if your pdf viewer.
Those are links in pdf file. You can switch the red boxes off in the options if your pdf viewer.
Re: Sketcher tutorial
This is how Okular (and maybe other viewers) display internal hyperlinks. You can customize this in the viewer. It's not part of the document.
Re: Sketcher tutorial
thank you guys for the help and input. I appreciate the quick replies.
Re: Sketcher tutorial new version is now Sketcher Lecture
Great job. Congratulations.chrisb wrote: ↑Thu Mar 26, 2020 7:16 pm Dear Friends of FreeCAD, I finally did it. I have uploaded a new version of the formerly called Sketcher tutorial. I have renamed it to the more appropriate title "A Sketcher Lecture" but it is basically the same contents. But only basically: I have updated quite some details to 0.19 and I have included allmost all remarks of openBrain - which was a huge load - and MSOlsen65, which was a lot too. Thus it has slightly grown in size, although some sections could be shortened due to an improved workflow in 0.19.
Please tell me nevertheless if you find errors.
Edit: the old linkis no longer working, use https://owncloud.gwdg.de/index.php/s/eZ ... 9/download
As FreeCAD is so parametric, I was wondering if you, as the father of "A Sketcher Lecture", could start a new topic, or maybe use this one, for collecting users experiences, tips and hints for trying to establish in some way rudiments on the art of setting sketch robustness. Of course, considering that in general there may be a compromise between robustness and computational effort. Then add (maybe) a chapter to "A Sketcher Lecture" considering this topic.
Congrats again.
I have uploaded many FreeCAD video tutorials to my YouTube channel
Re: Sketcher tutorial
Thanks for the compliment. You may well create such a topic yourself and elaborate what exactly you mean. I'm not sure what you mean by robustness, do you mean flipping sketches or sketches in the light of topological naming issues? Both seem to be independent from computational effort, which is mostly driven by the number of constraints, perhaps by the number of DOF consumed by constraints, i.e. a point-to-point tangency would take three times the effort of a vertical constraint.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Sketcher tutorial
Suppose a sketch depending on n parameters is fully constrained according to the solver. As we know, what we get is (in general) one of the (many) local solutions the sketch has subject to the imposed constraints. In this context, what I mean with robustness, is that if any of the n parameter(s) of the sketch is varied by a "non-small" (finite, non-infinitesimal ) quantity, the "form" (or the "structure") of the sketch keep unaltered.chrisb wrote: ↑Fri Apr 10, 2020 8:03 am Thanks for the compliment. You may well create such a topic yourself and elaborate what exactly you mean. I'm not sure what you mean by robustness, do you mean flipping sketches or sketches in the light of topological naming issues? Both seem to be independent from computational effort, which is mostly driven by the number of constraints, perhaps by the number of DOF consumed by constraints, i.e. a point-to-point tangency would take three times the effort of a vertical constraint.
I have uploaded many FreeCAD video tutorials to my YouTube channel
Re: Sketcher tutorial
I would think that the answer to such a case would vary widely in scope depending on both the broader design and the complexity of the sketch. That said, my first thought about the sketch, and possibly the design as well, is to consider simplification by reduction (i.e. use several simpler sketches instead of a single complex one). Generally, the simpler the sketch, the broader its effective range of variance without distortion is for a given local solution. While this will create a larger number of pad, pockets, etc., following the good practices of using construction datum and shapebinders, should in theory result in a far more robust design.jruiz wrote: ↑Fri Apr 10, 2020 2:40 pm Suppose a sketch depending on n parameters is fully constrained according to the solver. As we know, what we get is (in general) one of the (many) local solutions the sketch has subject to the imposed constraints. In this context, what I mean with robustness, is that if any of the n parameter(s) of the sketch is varied by a "non-small" (finite, non-infinitesimal ) quantity, the "form" (or the "structure") of the sketch keep unaltered.
Assuming I have correctly understood Chris' brilliant tutorial.
Sincerely,
Michael S. Olsen
Electrical Engineer & Joiner
Michael S. Olsen
Electrical Engineer & Joiner