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How Does Surface Text Know Where a Circle Starts and Ends and which way is up?
wesley_rishel
Member Posts: 8 ✭
I've had some troubles getting ST to put the text exactly where I want it, right-side up and not in mirror image. I've wrestled it to the ground in the document cited. Ideally the two phrases would be aligned to a single inner circle with Better Luck's bottom sitting on the circle and Next Time's top hanging from it. However when I tried that I would often end up with the text in mirror image, but I don't know what I did. Also I sometimes had the text upside down.
I got it under control with this simplified model, although I fear it is a bit fragile. In order to get this far I had to make two disconnected arcs instead of a circle and accept that "up" is Y-axis decreasing.
I can go with this but if anyone can quickly explain how ST works when the arc is a circle and what garndoggle thing I'm doing to make the text reverse, I'd appreciate it.
https://cad.onshape.com/documents/2b0e463955c5c1f3f05f2847/w/0d76d6600e91008f4b065fb5/e/300879e3f6828ad3992e55b1
Comments
You might have a simpler time of it with my feature "Text". It has manipulators to make it easier to arrange the text as you want. You can see how I did it here:
https://cad.onshape.com/documents/63a2add9319dfcd00a37e66e/w/129c77f4bcc604bde4b13410/e/72c3b728ea1b55bebd7d2b1e
And read about how the feature works at the forum post and watch the video here:
https://forum.onshape.com/discussion/comment/101768#Comment_101768
One thing you want to do is read up on sketch constraints. In the example I shared, I also use two arcs, but I add an "equal" constraint and a dimensional constraint so they are always the same radius. I constrain their centerpoints to the origin of the sketch so they dont move around, and add mirror constraints from the left endpoint of each sketch arc to its neighbor on the right of the construction line (the vertical dotted line).
@jnewth beat me to it! This question actually goes pretty deep so I thought it was a good reason to finally make a video about curve parameterization. See if this answers it..
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