The image below was done using Inventor/Solidworks software. It shows my preferred way to analyze my rockers. I like my rockers to follow a single radius arc for as much of the boards length as possible. Ususally about 2/3 the length.
This image shows what happens when I try to work with AKU, Shape3D (free version) or BoardCAD. Can any of these actually draw an arc? How do you ensure the control points I added at 1 foot intervals, maintain a true spline or arc. I’m finding these a bit wacky. I’m sure they’re not, what am I failing to see?
You have to remove those two points in the curve. The handles on the points are warping your rocker curve.
Use as few points as possible to describe your curve. Insert guide points at the positions you want the curve to pass threw to tune your curve. Or, ghost a screen shot of your rocker from your other CAD package.
The less points the better in these “Board” Cad programs.
Ah, guides points make sense. Is there a way to drawing a single radius arc? I want to stop using Inventor completely, but would like to draw that arc and verify.
I agree with Josh. Measure points in your Solidworks file and manually draw them in Shape 3d. Then adjust your bottom curve to hit these points. Verify with a ghosted image from your Solidworks profile. And no…the surboard specific CAD programs won’t let one draw a true arc.
