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Unresolved Prints on one side warping

Discussion in 'Troubleshooting' started by Mike Glass, Jan 10, 2015.

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  1. Mike Glass

    Mike Glass Active Member

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    I noticed today on most of my prints on one side that they look uneven, It just seems to be on the usb side of the robo, just on the edge.
     

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    #1 Mike Glass, Jan 10, 2015
  2. Mike Kelly

    Mike Kelly Volunteer

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    I bet that's the side opposite of the fan right? Adding a second cooling fan tends to help
     
    #2 Mike Kelly, Jan 10, 2015
  3. Mike Glass

    Mike Glass Active Member

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    Fan sits center to the extruder, unless your talking about the extruder fan. Should I try a percentage of fan maybe?
     
    #3 Mike Glass, Jan 10, 2015
  4. Mike Kelly

    Mike Kelly Volunteer

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    #4 Mike Kelly, Jan 10, 2015
  5. Mike Glass

    Mike Glass Active Member

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    I turned the part to the side to see what would happen other side is smooth, just seems to be on the USB side of the printer, the fan as far as I can tell blows straight down the middle, and it is not the front or back side of the part that is having issues.
     

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    #5 Mike Glass, Jan 10, 2015
  6. k1e1v1i1n

    k1e1v1i1n Active Member

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    Why not print something like a cube that is the same on all sides to see the problem better.
     
    #6 k1e1v1i1n, Jan 10, 2015
  7. Mike Glass

    Mike Glass Active Member

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    I printed a cube when I first got it, I printed the same one and it does not show, it seems if the sharp edge is on the right side of the bed it does this, very strange, I have turned some of my prints and seems to work a little better, here is my last one that i stopped because of this, I am now printing turned 80 degrees or so. I might print a cube so the corners are on the X axis and see what happens.
     

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    #7 Mike Glass, Jan 11, 2015
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Something must be binding if it is that consistent.
    Is a wire getting caught or something like that?
    I have had a number of different things cause a bind... the wire bundle was one (it is now tied back out of the way on all sides).

    Have you been watching it when the skip/shift occurs?
     
    #8 mark tomlinson, Jan 11, 2015
  9. Mike Glass

    Mike Glass Active Member

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    So printing a cube turned 45 degrees on the bed so that there is a corner on the X axis I see the same problem, no the question is why!
    I watch it as it is printing no wires, no hangups, the only thing is see that is different is there are the heat and thermistor wires on that side of the extruder, maybe blocking some air, not sure, going back looking at my first prints this has been happening, just more predominant on sharp edges, round objects run just fine.
     
    #9 Mike Glass, Jan 11, 2015
  10. Mike Kelly

    Mike Kelly Volunteer

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    Can we see some pictures of all sides?
     
    #10 Mike Kelly, Jan 11, 2015
  11. Mike Glass

    Mike Glass Active Member

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    Could shell thickness be an issue, I have been using .8 in Cura.

    here is a cube showing two corners.
     

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    #11 Mike Glass, Jan 11, 2015
  12. Mike Kelly

    Mike Kelly Volunteer

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    Does the print curl up during printing?
     
    #12 Mike Kelly, Jan 11, 2015
  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Where is the part that warps in relation to :

    ^
    |
    |
    Y/X--------->
    (assuming home is the bottom left corner)
    Is it not happening at the Low Z?
    Seems like one part of the corner is normal (not sure if that was top/bottom)
     
    #13 mark tomlinson, Jan 11, 2015
  14. Tanbam

    Tanbam Member

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    I was having to exact same issue as you have with my original setup. I had the same distortion in the rear-right corner of my calibration cubes. After changing my extruder nozzle (which was slightly clogged) the problem went away.

    Try extruding some filament and make sure that if flows cleanly downwards in a nice, straight stream. If it is shooting out towards one side and/or curling up at the nozzle tip, it might be most obvious in one particular direction.
     
    #14 Tanbam, Jan 11, 2015
  15. Mike Glass

    Mike Glass Active Member

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    Mark, that was bottom that was normal, towards the top you can see its starts, this happens only on the +X axis, if the cube is placed as usual, it does not do this, if turned 45 degrees so the point is toward the usb port, then distortion happens.
     
    #15 Mike Glass, Jan 11, 2015
  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    OK, I think that is probably some sort of drive lash then.
    Not a huge amount...well, hard to estimate size from the picture, but I assume not a huge cube.
    The fact that changing the arrangement of the model can 'hide' it tends to support that IMHO.

    Does it continue up the Z axis if that extends further up?
    Is the X drive belt tight enough?

    The weight of the carriage can cause the lash to be more evident at some points on the axis due to the more violent movements the slicer will have it make. If it is moving smoothly along an axis it will be less likely to show up than if it is making a sudden change.
     
    #16 mark tomlinson, Jan 11, 2015
  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    P.S. I had something similar happen to me on one really tall model I was printing. It happened quite far up on the Z and probably because I did not have the Z rods supported at the top (and I was near the maximum Z)
     
    #17 mark tomlinson, Jan 11, 2015
  18. Mike Glass

    Mike Glass Active Member

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    I can print to 3.5 inches after that its not pretty, still waiting to hear from support if they are sending any replacements. I have the z rods supported, I might try simplify3d for this corner issue.
     
    #18 Mike Glass, Jan 11, 2015
  19. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That would be interesting if it changes the behavior :)
    It uses a completely different algorithm for its default slice settings so the movements would potentially be different.
     
    #19 mark tomlinson, Jan 11, 2015
  20. Mike Glass

    Mike Glass Active Member

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    Wish they had a demo to try first, oh well, might be worth the investment.

    Well adding another fan seemed to do the job.
     
    #20 Mike Glass, Jan 11, 2015
    Last edited by a moderator: Feb 12, 2015
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