SOLIDWORKS - Spline Manipulation Techniques

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Learn about the various techniques to manipulate spline sketch geometry in SOLIDWORKS. Quick Tip presented by Anthony Willer of GoEngineer.
About GoEngineer: GoEngineer delivers software, technology and expertise that enable companies to unlock innovation and deliver better products faster. With more than 30 years experience and thousands of customers in high-tech, medical, machine design, energy and other industries, GoEngineer provides best-in-class design solutions from SOLIDWORKS, Stratasys, CAMWorks and Agile PLM.
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[@joelthompson8351]

I'm learning SW. I am a fair CATIA driver, but SW is a lot different environment. I have been practicing and watching videos. This one was GREAT!!! Thanks. As said before: concise and informative.

[@swamihuman9395]

Good job, Anthony. Thx.

[@andrewparker2751]

Concise & informative - just what I expect from GoEngineer. Nice video!

[@goengineer]

Thanks, Andrew! We try our best to help.

[@oorbe33]

great video! Thanks!

[@davelahoud1256]

No fluff - just great tips!

[@sandrana5061]

Thank you so mach. Very helpful

[@bendemanish1446]

Hi Anthony willer thanks

[@kandasamyrajan]

Thanks

[@diirtburns]

Awesome! Thank you very much

[@goengineer]

We are glad to help, thank you! 😊

[@dreadedartist]

Thanks for the video. I'm new to Solidworks, about a year in, and having an issue. Wondering if you guys have a video that might help. I'm having issues when saving and exporting as dxf files for laser cutting. The splines in my files are not smooth curves like what I see while I'm working on them. They end up as chunky lines in the saved dxf file. I've had a couple laser cutting projects come back as chunky lines where they should have been nice clean curves from what I saw onscreen. Is there something I'm missing? This is a huge issue I'm trying to over come. Thanks.

[@goengineer]

Saving a 2D file to DXF tends to turn curves, especially organic curves like Splines, into a series of short, straight segments as part of the translation.
It’s an effort to simplify G Code for machining, so it doesn’t generate a fairly ‘infinite’ path from the curve. A series of straight vectors is much smaller in the code.
One follow-up question though……is you 2D Drawing of a Sheet Metal Part?
If so, there is a feature in the Sheet Metal FLAT PATTERN Properties that might help.
Right Click the FLAT Pattern feature and EDIT FEATURE. You will see a check box for a setting called Simplify Curve. If this is ON, it will automatically turn organic splines into a series of line segments for the very purpose described above. If you turn this off, you will have a better chance of getting a smooth path and cut.

[@saeedkeyvani4086]

Hi, thank you for your useful videos.
I have a question and I will appreciate it if you can answer 🙏
What is the meaning of the dimension that we set as the "tangency length" of the endpoint of a spline?
I know what happens when we increase or decrease it, but when we are going to set it as for example 300 mm, so what thing is going to be 300 mm?
When you set the dimension of a line as 100 mm, it is clear! You mean that from one endpoint to another endpoint is 100mm!
But in spline what is this amount exactly for? from where to where?

[@goengineer]

In this case that represents the linear distance between that tangent point and the end point of the spline. This is for demonstration purposes only there may not be a good practical reason for that dimension it is sole purpose he is that you can use it to control the curvature of the spline.

[@knowledgecentre2907]

Sir,
in this exercise you have given arrowhandle dimension 60 mm ,what does it indicate.could you please
respond.
thanks

[@zawilious]

when i try to move one handle, all other handles are changing as well which s frustrating, is there a way to edit each handle alone ?

[@vinnyvincelive]

Would a machinist be able to reproduce these curves with the dimensions given in the video? I always thought they typically would require the equation of the curves...

[@LifeInJambles]

I mean I'm not a machinist, but I think this kinda stuff is what CAM is for.

[@sainathdesai4081]

I can't get those vector looking thing on my spline to control it plzz someone help me

[@goengineer]

You may have a setting turned off.
Go to TOOLS | OPTIONS | System Options and select the SKETCH category. Make sure “Enable Spline Tangency and Curvature Handles” is checked.
If this is already ON and you are not seeing the handles, this may be video related. Please contact support via our website GoEngineer.com.

[@HaasMill]

Is spline the same as bezier curve?

[@goengineer]

Style Splines are based on bezier curves