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Understanding Managed In-Context Design, In context design within a doc, step 28
robert_weissburg
Member Posts: 31 ✭
I have to admit (and hate to) that I'm stumped. I have spent 15 hours on this one step on 3 days, but can't get the bracket modification fully defined. All the lines of the sketch are black, but I need to add to dimensions to get that, which aren't present in the slide in the tutorial. The feature still shows not Fully defined. What am I missing? I have done every combination of constraints I can think of without improvement on this.
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Answers
The lines might be black, but look carefully for some blue line endpoints. When I did the exercise, I had two endpoints I had to constrain.
I added a few more constraints, but that didn't change the error. One thing I notice in yours and in the tutorial picture, the line on the bottom that is the right side of the angled block, running off the bottom of the image above is not part of the sketch in mine (gray), but is in yours and the tutorial. I can add a line there, but it doesn't change anything. It seems in yours it is part of the Use. I would swear that I selected the two things for the use correctly and have no idea how to alter a Use post facto.
OK, it wasn't hard. I selected Use and clicked that line. It made it Use, but also didn't fix the issue.
Another version, with centerpoint circles over the two holes of the left. Still same error.
These all look blue to me. Click and drag them to see what's not defined. Or share your doc.
My doc is public. Don't know how else to share. I wasn't able to move the right and lower points you circled, but I could move the other. I moved the end of the left line to the right a bit and used coincident to attach them together and it couldn't solve, giving this.
The right and lower points were black and now the right one is blue. Would have been nice if a better contrasting color was used than blue.
I deleted the diameter dimension and everything looks black now, but still error.
I found that the point on top of the big circle could now be pulled apart, so I coincident connected it to the circle. I tried pulling every point and nothing moves.
It's subtle, but the size of these vertices is your clue. There is some underlying unconstrained geometry.
@Matt_Shields
That is very subtle. It's also crazy that I just learned this trick. FFS. It really should be a lot easier to find these sort of overlapping unconstrained vertices.
Simon Gatrall | Product Development Specialist | Open For Work
I played with it for a couple hours and now have this.
Scroll down :)
The "Profile inspector" tool is made to find these… I just wish it highlighted points that are "on an edge" as well:
It finds these:
But not these:
Or alternatively a filter option in the constraint manager for "under constrained"
The Profile Inspector. I've done many of the tutorials (2 dozen?) and no mention of this yet. I was trying to find such a tool.
I didn't even know that part of the assembly was in "play", as it were.
Thanks Matt!
Well, I didn't get far before getting stumped again. I assume this must be a result of an earlier error of some kind, probably in the context bit, though everything I did gave the result expected. on doing step 32, I have an error on Cylindrical1 mate, saying it is over-defining the assembly. I see two other mates not part of the exercise that are red associated with the lower shock and pivot axle. I can't figure out what is the problem.
The assembly moved as expected on the previous step, before setting the limits in step 32. This happened then.
Yikes. Maybe flip the primary axis on the Cylindrical mate?
That just puts the shock mount point inside the mount bracket.
before
after flip.
Somehow the shock has lost its selfness. I would have thought there would be a mate of the piston face to the bottom of the cylinder, but I don't see a mate for that. Although, I don't see how doing that would change the definedness (new word!) of the Cylindrical1 mate.
Mind you, if I delete the limits in Revolute1 (min and max are set to 0 deg in the exercise). The shock goes back together and it looks like it should. I don't understand what that 0 deg was supposed to accomplish, but as soon as that is added, the shock comes apart and the overdefined error appears.
Anyone have any ideas?
It would be a lot easier if you could share a link to a public document. Weird mate issues are hard to diagnose fully through some screen shots.
Simon Gatrall | Product Development Specialist | Open For Work
Oh, sorry I thought the name at the top of the drawing was all one needed for that. All my stuff is public.
Did the link I put in go through? I don't see it above, only the text above it. There's an orange exclamation point where the link should be.
I'll try again.
https://cad.onshape.com/documents/c96aa9527cf97650f0c50446/w/f11d22ad2116333e2f6c5e53/e/dad8768381b527963be63710?renderMode=0&uiState=6924e674c76151cd0a67bea3
I've added the link to the drawing. Can someone provide any incite? I have been stuck on this tutorial for 3 weeks.
I decided to start over on this tutorial and I have gotten stuck again at step 28, but in a different way. The sketch is complete, except that I can't draw that long vertical line on the right side of part that the new mount is attached to. In the previous attempt it was possible to make the lower end of the line coincident with the bottom line's right end point, but this time that is not possible. I've spent 4 hours trying to figure out why, but don't see what the difference could be. I don't really understand why it worked before, as the corner of this part isn't even in the same plane as the sketch and it hasn't been made a reference with the context feature, but it was simple before. Very frustrating. It looks fine below, but there is a gap at the lower point.
https://cad.onshape.com/documents/edc9e28465e5e7a16f2b9e96/w/8b85bd713c34e3b5039d8b06/e/e3a4056ee5e1a964374e46c4?renderMode=0&uiState=6930f4d35d73ad86aa118d1e
I think starting over was the right call. In this sketch, I can see a line in the middle that I don't think is supposed to be there.
That line is there in the tutorial drawing. It does seem like all you need in the periphery and the whole. I still don't get why I can't select the bottom point for the long line, like you showed me to do last time and I could just click on the corner and the end of my line and it connected. Now it won't connect to that corner.