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Surface Pattern - with options [NEED HELP]
romeograham
Member, csevp Posts: 672 PRO
Hi folks,
I have a need to produce a pattern of counterbored holes, that share a normal direction, but the depth of which is driven by (with an offset) a surface or series of surfaces.
(here's a link to this doc, for what it's worth: https://cad.onshape.com/documents/b8b049f29e118ac362283888/w/76ff719b97d61faaaceee43e/e/bb23849d255c9d4e7d9f060a)
You can see that the holes are counterbored from below, but the C/B depth is driven by an offset to the curved surface on the top of the part.
To do this, I used a clumsy workaround of extruding surfaces to create edges so that I could produce Mate Connectors in an array offset from the curved surface....then used the excellent Transform PatternFS: https://cad.onshape.com/documents/25a0a6dfaa76e64574a5e0db/v/2774930de3ae2fb44180ceb8/e/4c62c06c4e0e4db3703a2d4c to create the holes. I can't find the author of the Transform Pattern, but I got it from the github repo by @dave_cowden : https://github.com/dcowden/featurescript
I would use this FS: https://cad.onshape.com/documents/c9eb49fac6fa713673b7e7c6/w/192ff3b7dceb0a84b3c139de/e/e4886efaea6f211a064a3042 by @maximilian_schommer if I could specify a "direction" for the patterned bodies (normal to the flat bottom of the part, rather than normal to the curved surface). I'd like to use this pattern, but use a point pattern (shown here on the bottom plane) to drive the positions of the pattern, rather than U & V quantities.
Another FS that seemed maybe useful (to produce a 3D array from a planar array of points) is Extrude Vertex: https://cad.onshape.com/documents/c5243aa82f2e404377db3017/w/2e1cd14f8ef6ad44b7c02b44/e/3e29af229aa22790e8d90389 (can't find author either right now), but it only accepts a single vertex per instance...which makes the 3D array a lot of work to create.
I have looked around quite a bit today, and haven't found a FS that will create a Point Pattern on a surface (or even better, offset from a surface). Then I could use that pattern to make Mate Connectors, then use the MCs for the Transform Pattern.
Ideally, these features would be combined so that I could:
Have I missed the perfect FS that already exists? Is there a combination of FS that someone can think of that I should use?
I don't mind doing a couple steps to end up with my 3D point array, but I don't want to make every single hole individually.
Thanks everyone.
I have a need to produce a pattern of counterbored holes, that share a normal direction, but the depth of which is driven by (with an offset) a surface or series of surfaces.
(here's a link to this doc, for what it's worth: https://cad.onshape.com/documents/b8b049f29e118ac362283888/w/76ff719b97d61faaaceee43e/e/bb23849d255c9d4e7d9f060a)
You can see that the holes are counterbored from below, but the C/B depth is driven by an offset to the curved surface on the top of the part.
To do this, I used a clumsy workaround of extruding surfaces to create edges so that I could produce Mate Connectors in an array offset from the curved surface....then used the excellent Transform PatternFS: https://cad.onshape.com/documents/25a0a6dfaa76e64574a5e0db/v/2774930de3ae2fb44180ceb8/e/4c62c06c4e0e4db3703a2d4c to create the holes. I can't find the author of the Transform Pattern, but I got it from the github repo by @dave_cowden : https://github.com/dcowden/featurescript
I would use this FS: https://cad.onshape.com/documents/c9eb49fac6fa713673b7e7c6/w/192ff3b7dceb0a84b3c139de/e/e4886efaea6f211a064a3042 by @maximilian_schommer if I could specify a "direction" for the patterned bodies (normal to the flat bottom of the part, rather than normal to the curved surface). I'd like to use this pattern, but use a point pattern (shown here on the bottom plane) to drive the positions of the pattern, rather than U & V quantities.
Another FS that seemed maybe useful (to produce a 3D array from a planar array of points) is Extrude Vertex: https://cad.onshape.com/documents/c5243aa82f2e404377db3017/w/2e1cd14f8ef6ad44b7c02b44/e/3e29af229aa22790e8d90389 (can't find author either right now), but it only accepts a single vertex per instance...which makes the 3D array a lot of work to create.
I have looked around quite a bit today, and haven't found a FS that will create a Point Pattern on a surface (or even better, offset from a surface). Then I could use that pattern to make Mate Connectors, then use the MCs for the Transform Pattern.
Ideally, these features would be combined so that I could:
- Define my pattern / array with a planar sketch (or selection of vertices or whatever)
- project those points to a curved surface (or offset of same)
- use those new 3D point array to drive a boolean operation, using a tool body that I can select
Have I missed the perfect FS that already exists? Is there a combination of FS that someone can think of that I should use?
I don't mind doing a couple steps to end up with my 3D point array, but I don't want to make every single hole individually.
Thanks everyone.
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That's a good way to do it - I hadn't thought of using the Transform Pattern that way to produce the 3D array of MCs.
Thanks for the suggestion!