HI, trying for a while now to get lines to stay attached to each other I seem to be having trouble with inconsistent behavior in this software, it says I am over constrained when I am unconstrained. I linked a video that demonstrates the issue I am having with lines detaching when the sketch is in an easily solvable condition and refusing to reattach. Any advise on how to avoid this, or get the lines to connect? I have snapping on, changing the distance doesn't seem to have an effect
Closing sketches/line segment constraints questions
- Thread starter TWA
- Start date
There is an awful lot in that sketch. This leads to
Greater chance of some problem such as over-constrained, or a corrupt dimension.
Very difficult to diagnose and correct when problems do occur.
As soon as there is an issue that the constraint solver can't handle - you can no longer rely on any additions going forward.
As a general rule, try to keep sketches much simpler. It will mean more sketches/features, but overall the result will be much more robust.
Greater chance of some problem such as over-constrained, or a corrupt dimension.
Very difficult to diagnose and correct when problems do occur.
As soon as there is an issue that the constraint solver can't handle - you can no longer rely on any additions going forward.
As a general rule, try to keep sketches much simpler. It will mean more sketches/features, but overall the result will be much more robust.
HaroldL
Alibre Super User
As @DavidJ indicated, keeping the sketches simpler is better. Plan your sketches as if you are creating the part in the shop, step by step.
Running the Analyze tool the sketch shows a few issues.
I would delete all the holes and rectangular cutout sketch figures. ONLY define the shape of the part. Then add the holes with the Hole tool. The rectangular cutout will become its own sketch/feature.
The overlap appears to be an extra vertical line you have sketched on the LH side of the part.
Running the Analyze tool the sketch shows a few issues.
I would delete all the holes and rectangular cutout sketch figures. ONLY define the shape of the part. Then add the holes with the Hole tool. The rectangular cutout will become its own sketch/feature.
The overlap appears to be an extra vertical line you have sketched on the LH side of the part.
I deleted the overlapped line and the original line on the lh side re drew the original line and was able to successfully close the sketch and briefly had a sketch with no problems where a dimension could be changed without it falling apart. I redrew the last line in to two separate lines and once again can not change anything or it breaks. So I guess I am stuck with throwing it all out and starting over?
So another question is is there a way to make the edges of an object and a drawn line to not visually appear the exact same color? dealing with the line along the edge it seems to prioritize selecting the edge of the existing part vs the line so the line seems to almost disappear.
So another question is is there a way to make the edges of an object and a drawn line to not visually appear the exact same color? dealing with the line along the edge it seems to prioritize selecting the edge of the existing part vs the line so the line seems to almost disappear.
HaroldL
Alibre Super User
You won't necessarily need to throw all you work out, just remove everything that doesn't define the shape of the part and go from there. One thing you want to try and avoid is using a Zero dimension to locate a sketch figure on an edge. Use either a coincident for nodes or collinear for lines.
Once the shape is defined then add the holes, grouping all the same size holes into one feature.
I'm attaching the part I completed, unless I missed a hole, as an example for you.
Once the shape is defined then add the holes, grouping all the same size holes into one feature.
I'm attaching the part I completed, unless I missed a hole, as an example for you.
HaroldL
Alibre Super User
Since you can't open the part for viewing here are some screen shots of the sketch. I screen shot in three sections,Top, Middle and Bottom, so the the sketch was enlarged a bit. The highlighted rectangle in the bottom image is an outside rectangle to help define the island for cut out.
I think the holes should be self explanatory and not needing all of them screen shot. I'll only do one so you can see the sketch
IF you add your program version to your signature that will make it easier for others to determine if they can upload models for you to analyze.
And here is the first set of holes:
I think the holes should be self explanatory and not needing all of them screen shot. I'll only do one so you can see the sketch
IF you add your program version to your signature that will make it easier for others to determine if they can upload models for you to analyze.
And here is the first set of holes: