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Offset Edges
graham_lock
Member Posts: 160 PRO
Hi,
Can anybody tell me why the edge offset on the second part is reversed please?
Test document here:
https://cad.onshape.com/documents/014a544ef8fee7afbe54eb07/w/9328ba64d02b97903c5c3f3e/e/733c11f306b6efca126c8ff0
Thank you.
Best Answers
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S1mon
Member Posts: 3,039 PRO
Under the hood, every (except sketch points?) sketch entity has a beginning and end. This invisible property can affect the way that some downstream operations work.
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glen_dewsbury
Member Posts: 822 ✭✭✭✭
I missed the offset between sketches.
Your sketches are using mate connectors from different locations. This is affecting directionality of offset in your feature script.
The first sketch uses the origin as corner of rectangle while the second uses mid point of edge and the next 2 use center of face.
I redrew all sketches using center of sketch as origin which provides consistency but you need to adjust direction of offset in the feature script. Planes aren't needed, Mate connecters are fine. See branch B1. Not so familiar with FS. Perhaps S1mon can help there.
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Answers
It's hard to tell from the document, but my guess would be that you didn't draw all the rectangle sketches the same. In other words, 3 of 4 were top left to bottom right, but the problem child was bottom right to top left.
Your mate connecters uses to make individual sketches are not consistent. I played around with with them for a couple minutes then switched method. By using an array of parts the copies are consistent and allows the feature script to operate consistently. You may want to do what ever your going to do with faces to get a solid then create an array of parts.
https://cad.onshape.com/documents/b8f6f9a1dfe728e7c3750a0e/w/b724d97c8c32dde350e1802b/e/1224b38012a9ef3ca6f750e8
Thank you for your reply and the advice.
My parts are not all the same size so I guess that precludes a part array?
Could you elaborate on the mate inconsistencies please?
Maybe I'd be better off using separate planes rather than mate connectors?
@S1mon thank you - I'll redraw and see what happens.
Why would the direction of drawing affect the offset direction?
Under the hood, every (except sketch points?) sketch entity has a beginning and end. This invisible property can affect the way that some downstream operations work.
I missed the offset between sketches.
Your sketches are using mate connectors from different locations. This is affecting directionality of offset in your feature script.
The first sketch uses the origin as corner of rectangle while the second uses mid point of edge and the next 2 use center of face.
I redrew all sketches using center of sketch as origin which provides consistency but you need to adjust direction of offset in the feature script. Planes aren't needed, Mate connecters are fine. See branch B1. Not so familiar with FS. Perhaps S1mon can help there.
https://cad.onshape.com/documents/b8f6f9a1dfe728e7c3750a0e/w/0bbb51c423e3d35c8ee88b93/e/1224b38012a9ef3ca6f750e8
Thank you @S1mon - makes sense.
Thank you @glen_dewsbury .
I've copied your document and reversed the direction - all good!
I didn't realise that the mate connector positions would cause that effect!