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Unresolved Print head dropping into model

Discussion in 'Troubleshooting' started by josh.2o, May 2, 2016.

  1. josh.2o

    josh.2o New Member

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    Okay so I have a robo 3d r1 (not plus), and every time I try to print something the first 15 or so layers go down fine but then the hot end drops down into the model causing gaps in the print.

    Here's some pictures of a print I had to cancel.
    [​IMG]
    [​IMG]
     
    #1 josh.2o, May 2, 2016
  2. josh.2o

    josh.2o New Member

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    One other thing I forgot to add is I upgraded to an e3d v6

    Sent from my ONE E1005 using Tapatalk
     
    #2 josh.2o, May 2, 2016
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Well, what is your configuration.h Z steps value? (What firmware did you modify and load)
    There are several flavors and the incorrect one will not work (since it will not match your hardware):
    Beta, R1, R1+, R1 w/leadscrew update...

    Are there any errors in the GCode console?
     
    #3 mark tomlinson, May 2, 2016
  4. josh.2o

    josh.2o New Member

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    I have everything stock with no lead screw upgrade and, I cannot find any g code errors

    Sent from my ONE E1005 using Tapatalk
     
    #4 josh.2o, May 2, 2016
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    try a different slicer then.
    Worst case it may be a defective / weak stepper driver for the Z steppers.
     
    #5 mark tomlinson, May 2, 2016
  6. josh.2o

    josh.2o New Member

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    I have tried cura and a similar thing happens there. It seems like the z rods turn backwards on certain layers.

    Sent from my ONE E1005 using Tapatalk
     
    #6 josh.2o, May 2, 2016
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The rods turning backwards would be a slicer issue (since it generates the GCode that controls the printer).
    Steps getting skipped could be a weak/de-tuned stepper driver. The r1 shares the two Z steppers across a single driver card on the RAMPS.
     
    #7 mark tomlinson, May 2, 2016
  8. josh.2o

    josh.2o New Member

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    Okay thank you for your help

    Sent from my ONE E1005 using Tapatalk
     
    #8 josh.2o, May 2, 2016
  9. josh.2o

    josh.2o New Member

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    One last thing I found out that my z steps per mm is 2267.72 is this right for an r1 with no lead screw upgrade?

    Sent from my ONE E1005 using Tapatalk
     
    #9 josh.2o, May 2, 2016
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #10 mark tomlinson, May 2, 2016
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #11 mark tomlinson, May 2, 2016
  12. josh.2o

    josh.2o New Member

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    Thank you for the help. After updating my firmware to the proper steps per mm and still having this problem, I ordered some stepper drivers off Amazon. Do you have any advice on taking the old ones out.

    Sent from my ONE E1005 using Tapatalk
     
    #12 josh.2o, May 6, 2016
  13. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    They are not complicated it is a straight-forward mount on all of the steppers. You need to remove the top, remove the bottom and probably remove the X axis off of the rods as well. You might get away with leaving the X in place if you can reach the couplers to disconnect the stepper drive shafts with the cover removed. If not you will need to remove the stepper mount screws and drop the threaded rod down through the bottom so you can disconnect the couplers from the threaded rods.
     
    #13 mark tomlinson, May 6, 2016
  14. josh.2o

    josh.2o New Member

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    Okay thanks I will try that

    Sent from my ONE E1005 using Tapatalk
     
    #14 josh.2o, May 6, 2016
  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Good luck. Just go slow and pay attention to where things mount/connect.
    Take pictures as you go.

    It will take an hour or more with care, but it is not super complicated.
     
    #15 mark tomlinson, May 6, 2016
  16. josh.2o

    josh.2o New Member

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    Is there a ceritan direction I need to mount them? It looks like they can be mounted either way.
     
    #16 josh.2o, May 6, 2016
  17. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    ? Physically or electrically. The physical mounting is not terribly critical that they be lined up exactly the same orientation. Well, 'up' and 'down' are obviously important :) Other than that not so much.
     
    #17 mark tomlinson, May 6, 2016
  18. josh.2o

    josh.2o New Member

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    Okay thanks
     
    #18 josh.2o, May 6, 2016
  19. danzca6

    danzca6 Well-Known Member

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    Odd to see how well the first layers go down and the rest go to crap. Have you checked to make sure the threaded rods are oiled and that you ramps fan is working?
     
    #19 danzca6, May 6, 2016

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