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Trying to constrain sketches: unsolvable solutions
joseph_newcomer
Member Posts: 90 ✭✭✭
in Drawings
I am enclosing an annotated picture of the problem; the file is in my public area (since I am using the free version).
I am trying to create a part drawing. In sketch 2, I have the lower half of the device (the rectangular prism part). As shown in the annotated screen capture, what I want to do is make the pins be coincident to the front of the part (as indicated by the red arrows). But if I click "coincident constraint" and click the front of the part (as indicated by the left arrow) and then the pin outline that is parallel to the edge (as indicated by the right arrow) I get an "unsolvable solution".
I did the following: I created the three outlined boxes. I dimensioned one side of one of them, and then made the two adjacent sides of that element equal. I then made the sides of the other two squares be equal. So far, so good. Next, I created a construction line and made its endpoints coincident to the centers of the leftmost and rightmost squares. I made the center of the middle square be coincident with the line. Then I dimensioned the center points to be 1.27mm apart. So far, so good. Next, I put a construction line on the midpoints of the front and back of the face of the extruded rectilinear prism. Good. I made the center point of the center square be coincident with that construction line. Good. Then, I selected coincident constraint clicked on the front line of the square (that becomes the pin) and clicked on the line that was the front of the prism (which is the back of the part). Unsolvable. I have no idea why. I tried several times, and was careful to not click the center point of the edge of the pin-defining square. So I don't quite have a finished part.
I can't figure out how to get the OnShape drawing attached, but it is in my public area, and is labeled "Adafruit 158 - Hall Sensor". If there is special magic I should do to attach the drawing itself. please tell me what it is.
I tried searching for a solution, but there was nothing that quite described this problem. After an hour, I gave up.
I am fleeing Autodesk Inventor, so I have done this as I would have done it in Inventor. If I am getting this wrong for OnShape, what should I have done? I have about ten years of experience with Inventor, but Autodesk took it away from me as I am now retired. (I like OnShape better, except when things like this happen that I do not understand).
Thanks,
Joe
I am trying to create a part drawing. In sketch 2, I have the lower half of the device (the rectangular prism part). As shown in the annotated screen capture, what I want to do is make the pins be coincident to the front of the part (as indicated by the red arrows). But if I click "coincident constraint" and click the front of the part (as indicated by the left arrow) and then the pin outline that is parallel to the edge (as indicated by the right arrow) I get an "unsolvable solution".
I did the following: I created the three outlined boxes. I dimensioned one side of one of them, and then made the two adjacent sides of that element equal. I then made the sides of the other two squares be equal. So far, so good. Next, I created a construction line and made its endpoints coincident to the centers of the leftmost and rightmost squares. I made the center of the middle square be coincident with the line. Then I dimensioned the center points to be 1.27mm apart. So far, so good. Next, I put a construction line on the midpoints of the front and back of the face of the extruded rectilinear prism. Good. I made the center point of the center square be coincident with that construction line. Good. Then, I selected coincident constraint clicked on the front line of the square (that becomes the pin) and clicked on the line that was the front of the prism (which is the back of the part). Unsolvable. I have no idea why. I tried several times, and was careful to not click the center point of the edge of the pin-defining square. So I don't quite have a finished part.
I can't figure out how to get the OnShape drawing attached, but it is in my public area, and is labeled "Adafruit 158 - Hall Sensor". If there is special magic I should do to attach the drawing itself. please tell me what it is.
I tried searching for a solution, but there was nothing that quite described this problem. After an hour, I gave up.
I am fleeing Autodesk Inventor, so I have done this as I would have done it in Inventor. If I am getting this wrong for OnShape, what should I have done? I have about ten years of experience with Inventor, but Autodesk took it away from me as I am now retired. (I like OnShape better, except when things like this happen that I do not understand).
Thanks,
Joe
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