How to collect multiple measurements of 2D figures from a 3D part

brett_bertini

I am still relatively new to Onshape so I am hoping that there is a simple answer to this question that I haven't considered. I recently created a 3D ellipsoid type object, and used a combination of a plane, split and linear pattern function to split the ellipsoid into multiple parts down a given axis. The result of this patterned split yields about 40-50 parts that are essentially just circular or elliptical cross sections of the ellipsoid as seen below.


I am interested in the dimensions of these split entities such as diameter, surface area, length, etc. which I can see when I select a face or outline of each part (seen in the image below). 




I am wondering if there is a way to efficiently get the values of interest for ALL cross sections created by these splits. I could always manually click through each part and record the data in excel but figured there may be a much simpler way to get the information for all parts simultaneously.

mahir

Here's a workaround that doesn't require writing a new FeatureScript. It uses @konstantin_shiriazdanov 's Measure Value FS and a variable to store the multiple values.

https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/d4109245832d652b03b7216c

_anton

I'd write a custom feature to do something like this. How would you use the output data?

brett_bertini

@_anton ideally I would like to just export the data to excel (or create a table of the data in onshape that I can copy to excel) so I can do some statistical analysis on the size distribution of the segments. Are there any tutorials you could recommend for me to learn how to write a custom feature like this? I have some coding experience but not much.

_anton

Yep, we've got some tutorials: https://cad.onshape.com/FsDoc/tutorials/create-a-slot-feature.html You can also search the forum for related custom features written by others.

For example, here's a slicer written by @MBartlett21: https://cad.onshape.com/documents/2c5bf4541f8a54d3ca943e8f/w/cf0f3b4597bfa4daa0381ca1/e/2938f49446e171cc9b60781f

...which I crudely modified to print out surface areas of the slices: https://cad.onshape.com/documents/f340ab16719cbae17016feec/w/f610de90e88cc5aa2fa68e9d/e/8e6a8c008e7e79871d440974 You can see the output by clicking the FeatureScript notices console button in the top bar.

mahir

Here's a workaround that doesn't require writing a new FeatureScript. It uses @konstantin_shiriazdanov 's Measure Value FS and a variable to store the multiple values.

https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/d4109245832d652b03b7216c

brett_bertini

@_anton @mahir thank you guys for the help! As I was looking through the documents you sent I stumbled upon the custom table feature, looked under the sample tables and found one called 'part bounds table' which gave me the length and widths of all the parts (slices) in a table which I can copy to excel! It doesn't give me the surface area, but I can easily calculate that in excel given the length and width.