Learning Forum

[satri]

when i trim a chord of a circle on space claim the circle center is getting shifted why does it happen.

I am trying to trim out line 1 or 2 when i do that the centre of the circle shifts and the sector of the circle becomes a semicircle like this

please tell me how to get stop the shift of the center

 

 

[Aniket]

Are you using trim tool in the sketch?

-Aniket

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[satri]

Yes I did use trim tool in the sketch. 

I couldn't find anything useful in help that's why I posted this problem here. (I would use other design software (even though I make a model using VBA, there are some other problems which I don't want to bring it to this discussion) but I am using space claim because of it's scripting feature in python which makes my modelling process easy. 

[Aniket]

Judging by the colors of the circle and line, it appears the circle is not constrained, while the line is fully constrained in the sketch, is that right?

I tried to duplicate the same on my end but seems to be working as expected.

before

after1:

after2

Would need some more information about your specific problem, would constraining the circle center before using the "Trim Away" tool help? One more thing I noticed is you don't have the default Grid, is that something you turned off intentionally?

-Aniket

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[satri]

I dont know how the grid got switched off and i don't know how to switch it on.

I thought about the constrained part that the circle may not be constrained..but when i do so ansys does not constrain it well 

see this

the center is at 0.398mm whereas the line is at 0.4mm

i want that 2micro meter distance between them (this is one of the reasons i stopped making the model solidworks thinking space claim will give me a better model)

[Rahul Kumbhar]

Check the unit system of Spaceclaim. If the dimensions in sketch are very small then it may cause this problem.

[satri]

I am in the lowest possible unit that space claim can give (mm)

there is no option of a micron in space claim. 

is space claim limited to mm? does it not go below that?

[Akshay Maniyar]

Hi Satri,

As suggested by Aniket and Rahul, it looks like the issue is because of the small dimensions. You can use the micrometer as a units to draw the sketch. You have to set units before you start a new design in SpaceClaim. 

Thank you,

Akshay Maniyar

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[satri]

I checked that it never allowed me to change the units lower than mm.

But it worked when i started the new document. it doesn't allow you to change the value on the fly i guess.

this fixed the problem. 

but on a separate note i was also able to fix the problem without changing the units, if i make those vertical lines with the script and still have mm as units i can trim off the outer sector without shifting the center.

anyway changing the units of the document is a much better and cleaner solution.

thank you