SPACECLAIM rescales dimensions of imported geometry file STL

mariachiara · November 29, 2021, 16:23

hi everyone, I have a problem with stl files that reads spaceclaim.
All files are created the same way but some are increased in size once imported to spaceclaim. I have to do simulations on abdominal and intracranial aneurysms and while the abdominal ones have no geometry changes, the intracranial ones greatly increase their size. I tried to change format using OBJ, I got a smaller size than the stl but still larger than the one actually imported. Can you help me? Thank you all.

synk · January 5, 2022, 23:55

1. Have you tried different settings in the 'import options' for STL or OBJ file types? By default, these are set to 'automatic detection of imported model units', but if you're getting incorrect dimensions you can manually select the system of units. Before opening the model to import, in SpaceClaim in the main design window menu, select:
File | SpaceClaim Options | File Options | STL
The first item on this options page is "Import...Units" with a drop down list for: automatic, inches, feet, mm, cm, and meters (some versions of SpaceClaim also provide micrometer and nanometer units).

2. For the imported model, when you select the 'Measure' tab on the main ribbon menu, and measure the distance between two edges, faces, or points, how does the SC calculated distance compare to your expected measurement? This ratio may give you a clue to determine if it is a scale issue.

3. As a test, you could import the STL to SpaceClaim, do some minor modification, then save as an STL file, then open it with the original application program you're using (I assume an MRI or CAT application) to compare the dimension saved by SpaceClaim.

4. Also, after you open the imported file in SpaceClaim, look at:

File | SpaceClaim Options | Units , to verify that SpaceClaim is displaying the model in the units you expected. This page is also where you specify the precision of a dimension, up to 1e-9m.

November 29, 2021, 16:23	SPACECLAIM rescales dimensions of imported geometry file STL	#1
mariachiara New Member maria chiara Join Date: Nov 2021 Posts: 1 Rep Power: 0	hi everyone, I have a problem with stl files that reads spaceclaim. All files are created the same way but some are increased in size once imported to spaceclaim. I have to do simulations on abdominal and intracranial aneurysms and while the abdominal ones have no geometry changes, the intracranial ones greatly increase their size. I tried to change format using OBJ, I got a smaller size than the stl but still larger than the one actually imported. Can you help me? Thank you all.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Custom Thermophysical Properties	wsmith02	OpenFOAM	4	June 1, 2023 15:30
[OpenFOAM.com] swak4foam compiling issues on a cluster	saj216	OpenFOAM Installation	5	January 17, 2023 17:05
[OpenFOAM.org] Error creating ParaView-4.1.0 OpenFOAM 2.3.0	tlcoons	OpenFOAM Installation	13	April 20, 2016 18:34
[swak4Foam] build problem swak4Foam OF 2.2.0	mcathela	OpenFOAM Community Contributions	14	April 23, 2013 14:59
friction forces icoFoam	ofslcm	OpenFOAM	3	April 7, 2012 11:57

January 5, 2022, 23:55		#2
synk New Member Join Date: Jul 2021 Posts: 3 Rep Power: 5	1. Have you tried different settings in the 'import options' for STL or OBJ file types? By default, these are set to 'automatic detection of imported model units', but if you're getting incorrect dimensions you can manually select the system of units. Before opening the model to import, in SpaceClaim in the main design window menu, select: File \| SpaceClaim Options \| File Options \| STL The first item on this options page is "Import...Units" with a drop down list for: automatic, inches, feet, mm, cm, and meters (some versions of SpaceClaim also provide micrometer and nanometer units). 2. For the imported model, when you select the 'Measure' tab on the main ribbon menu, and measure the distance between two edges, faces, or points, how does the SC calculated distance compare to your expected measurement? This ratio may give you a clue to determine if it is a scale issue. 3. As a test, you could import the STL to SpaceClaim, do some minor modification, then save as an STL file, then open it with the original application program you're using (I assume an MRI or CAT application) to compare the dimension saved by SpaceClaim. 4. Also, after you open the imported file in SpaceClaim, look at: File \| SpaceClaim Options \| Units , to verify that SpaceClaim is displaying the model in the units you expected. This page is also where you specify the precision of a dimension, up to 1e-9m.