Hi,
i need some sketches with only one sllipsis in each. The values of these ellipses should be changed parametricaly by a spreadsheet.
The problem is the dimensioning. The ellipsis gets into a unknown state when reaching the form of an circle.
After the values are the same, only the major dimension can be altered, the minor is no more changeable.
Freecad is in version 0,20, build 25844 GIT from 2021/09/25
Any way i can avoid this?
Ellipsis-Problems with dimensioning
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Ellipsis-Problems with dimensioning
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regards
Hartmut
Hartmut
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- papyblaise
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Re: Ellipsis-Problems with dimensioning
modify the 2 axes until equal, it works
modify the "small" to be "bigger" than the big one, more, problem of position of the foci which are on the "large" of origin and should "pass" on the "small" of origin
am I clear , I also mix my neurons by rereading myself
modify the "small" to be "bigger" than the big one, more, problem of position of the foci which are on the "large" of origin and should "pass" on the "small" of origin
am I clear , I also mix my neurons by rereading myself
Re: Ellipsis-Problems with dimensioning
The fuselage of this plane is made of eight profiles, each declared as an ellipsis.
The parameters for these ellipses and many more parameters are held in the spreadsheet.
It is not possible to change the "direction" of such an ellipsis by changing the sizes. When changing higher to lower value or lower to a higher value, the sketch is getting wrong.
In this case here, there is no need to change the directions of the ellipses, they are all "standing", but would be nice if there will be a ellipsis-version that can change the direction of it or can work with equal values and be later changed to unequal values...
Greetingt
Tutorius
The parameters for these ellipses and many more parameters are held in the spreadsheet.
It is not possible to change the "direction" of such an ellipsis by changing the sizes. When changing higher to lower value or lower to a higher value, the sketch is getting wrong.
In this case here, there is no need to change the directions of the ellipses, they are all "standing", but would be nice if there will be a ellipsis-version that can change the direction of it or can work with equal values and be later changed to unequal values...
Greetingt
Tutorius
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- Bildschirmfoto zu 2021-10-21 17-21-39.jpg (444.71 KiB) Viewed 1039 times
regards
Hartmut
Hartmut
Re: Ellipsis-Problems with dimensioning
Depending on the controlling values you could rotate the sketch by 90° thus the major radius can stay major, the minor stays minor.
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Re: Ellipsis-Problems with dimensioning
OK, i will try this... Something like:
Rotate-Value=(if x<y)*90
And a swap of parameters:
X2=x*(if x>=y)+y*(ifx<y)
Y2=x*(if xY=y)+x(if x<y)
will give it a try...
Thanks for the hint...
regards
Hartmut
Hartmut