Announcement

Collapse
No announcement yet.

I have a mystery Stl file that changes completely when I print it.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • I have a mystery Stl file that changes completely when I print it.

    I made a simple little lid for a box in Tinkercad which I have used quite often that looks ok in the slicer until I slice it and then it changes completely I have never had this happen before and though this tiny little print is not important to me I am just wondering what is going on. If anyone wishes to take a look at it and tell me why it does this here is the file. I did it in both Prusa and Cura with the same results. In fact as soon as you slice the stl file you see the change.
    Attached Files

  • #2
    I found part of the problem: the model is not sitting flat on the build plate. It's tilted up on the left end. I tried rotating it so it is flat, but it still has issues. I would redo it. I suspect you accidentally rotated it in TC and that issue promelgated through the whole model.
    Last edited by Ender5r; 11-16-2020, 04:26 PM.

    Comment


    • #3
      Aha! I knew you would find the problem. I shall do that and see what happens. It is strange though because Prusa is supposed to lay things down.

      Comment


      • #4
        I tried and tried and restarted but it is basically just the same. A bottom and no sides. I started new with a solid box and a void box which I lifted up 0.4 to make the bottom centered them on 2 axes and grouped them. As usual it looks fine when I import it to the slicer and when I slice it I only have the bottom, no sides.

        Comment


        • #5
          Cura also has the option to "drop models to the build plate". However, if the model is off kilter from the start, that won't help. In Cura I had a bottom & 4 sides, but there was a small section completely missing from the left corner of the front edge.

          Here are some images of what I got:

          Click image for larger version

Name:	LiftedEnd.JPG
Views:	58
Size:	35.0 KB
ID:	6114 This shows the left end off the build plate.

          Click image for larger version

Name:	TiltedSlice.JPG
Views:	67
Size:	313.9 KB
ID:	6116 This is how it sliced. Notice the front left corner.

          Click image for larger version

Name:	LayedFlat.JPG
Views:	67
Size:	38.5 KB
ID:	6117 This is after I layed as flat as I could manage.

          Click image for larger version

Name:	FlattenedSlice.JPG
Views:	59
Size:	208.9 KB
ID:	6115 And sliced after laying flat.

          Comment


          • #6
            I tried and tried and restarted but it is basically just the same. A bottom and no sides. I started new with a solid box and a void box which I lifted up 0.4 to make the bottom centered them on 2 axes and grouped them. As usual it looks fine when I import it to the slicer and when I slice it I only have the bottom, no sides.

            Comment


            • #7
              How about this. Seems to have fixed it.
              Attached Files

              Comment


              • #8
                oops sorry didn't fix it after all my bad just flattened it and nothing else.

                Comment


                • #9
                  Ok i don't know what you did to that model but you did a REALLY good job of it 😁

                  Comment


                  • #10
                    Larry, seems you got the same result I got. It is odd for sure. I tried the Mesh tools in Cura 4.8. They made some improvement, but didn't fix the basic issue.

                    roon4660, if you post the specs, I'm sure 1 of us can create a working STL for you.

                    Comment


                    • #11
                      I really don't give a damn about the stl file other than the fact that I don't know what went wrong. I was making a lid of OD 38.6 x 51.6 x 12.4 with a wall od ).4 mm. in Tinkercad. Since Tinkercad is the only thing I know how to use I would just like to know what I did wrong.

                      Comment


                      • #12
                        I have never used TC, so I'm no help with it.

                        Comment


                        • #13
                          I explained further up exactly how I did it. It's always worked before for me. I'm puzzled.

                          Comment


                          • #14
                            In trying to learn how to use Tinkercad I did lots of similar little projects but I have never had this happen. It couldn't be an easier project. I redid it from scratch 3 times with no cigar. I was just about to try a much more complicated project but until I figure out what is wrong.....hmmmm I wonder if I reboot my computer that might help. I have a habit of leaving it on all the time. I know that tinkercad can bug sometimes with a little help from my old macbook pro.

                            Comment


                            • #15
                              It seems pretty unlikely that a reboot would help, but what harm can it do?

                              Comment

                              Working...
                              X