Welcome to the Onshape forum! Ask questions and join in the discussions about everything Onshape.
First time visiting? Here are some places to start:- Looking for a certain topic? Check out the categories filter or use Search (upper right).
- Need support? Ask a question to our Community Support category.
- Please submit support tickets for bugs but you can request improvements in the Product Feedback category.
- Be respectful, on topic and if you see a problem, Flag it.
If you would like to contact our Community Manager personally, feel free to send a private message or an email.
Pattern following a curve
gary_smith251
Member Posts: 9 ✭
Hey folks,
Trying to wrap my head around linear vs part pattern to reach my end goal and cant seem to spot what im missing. I am designing a simple girder bridge that bows in the middle.
I have my two curves fully defined and all is good there, so looking to do the cross members by patterning as opposed to doing each individually. This is the design im making, so simple enough of a repeating pattern at 45 degrees
This is very much a "Spirit not replication" kind of model so specifics are not hugely important in terms of detail, just the general shape.
When trying to use a linear pattern it wont work because of what it says on the tin, linear. So I created a 2nd sketch of just the cross member to use part/feature pattern to follow the curve and cant seem to get that working either because if the extrude part is added to the first part its no longer unique, and if it its a seperate part is does not connect correctly to the lower curve even though the parts are coincident on the sketch
Would one of you kind souls please highlight the error of my ways?
https://cad.onshape.com/documents/c2c4394092d1016599819f34/w/8a9d238eb990f0143761e7f9/e/5ac6fc80630a02ca63d86e84?renderMode=0&uiState=6724c4d770123d4c26be5eb7
Answers
It didn't like referencing the edge for some reason… I used the original stketch for the coincident constraint.
You also have to include the sketch in the pattern and use the "reapply feature" check box. The trickiest part is that the sketch can't "move" if it has as a reference to left side of the underlying geometry, only references to the default planes/origin are "ignored" by the "reapply" (the notification at the top of the screen says this). I used a measured variable and a dimension from the right plane to get around it…
https://cad.onshape.com/documents/fa2ad450200cc3817b38d44a/w/279eceb0f1b23ed28faa1165/e/6e86eac80ceb82456378907a?renderMode=0&tangentEdgeStyle=1&uiState=672572f8836a9f5d3da1435d