Trying to constrain sketch to 3d geometry hole...problem
Trying to constrain sketch to 3d geometry hole...problem
(OP)
I've been trying constrain a sketch to a hole in another 3d part. Problem is, when I pick the edge of the sketch and the center of the hole to constrain the edge to it creates an angled constraint, then I pick that I want it to be a distance dim. and it gives me a zero dim from the sketch edge to the perpendicular point on that edge in reference to the hole. (I hope that made sense.) I'm unable to find out why it's doing this or how to rectify it. Any help would be appreciated. Thank You!





RE: Trying to constrain sketch to 3d geometry hole...problem
RE: Trying to constrain sketch to 3d geometry hole...problem
RE: Trying to constrain sketch to 3d geometry hole...problem
RE: Trying to constrain sketch to 3d geometry hole...problem
1. project the edge of the hole (or intersect the face), and then constrain to the yellow feature
2. add a construction line tangent to the edge of the hole, and constraint to the line
RE: Trying to constrain sketch to 3d geometry hole...problem
Regards,
Derek
RE: Trying to constrain sketch to 3d geometry hole...problem
Thanks again!
RE: Trying to constrain sketch to 3d geometry hole...problem
Regarding the XYZ origin: I don't think if really matters where the part is with respect to the origin. Assembly constraints should be used to locate the parts with respect to other parts. And I'm sure you have your own Axis System to base the NC data off of.
RE: Trying to constrain sketch to 3d geometry hole...problem
1) are the holes really holes?
2) Are they 100% perpendicular to the sketch plane?
3) Do they project as splines or circles?
4) Is the data native?
Here's my explanation:
1) sometimes, the features appear round, but are just "unround" enough to cause problems. (especially with translated data)
2) sometimes you get slightly skewed planes - just barely outside of the model tolerance for recognizing roundness - but corrected by projection. Strange and rare, but troublesome. (had the problem a lot in an earlier version)
3) Splines don't have centers. If the object projects as a spline, see #1 and #2.
4) UG data, in particular, always does this to me. For some reason, the holes are never recognized as round until projected.
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RE: Trying to constrain sketch to 3d geometry hole...problem
1) Yeah the solid I'm using, I created in V5 (Not translated data.) So, it should be round. (Used hole command)
2) I was thinking that a skewed plane may be the source of the problem. Used the compass to make sure it was at the right angles, everything checked.
3) The hole projected as a hole.
4) Yeah the data is native.
Not sure if I just have some setting not set right or something.