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Partially Solved Layers far apart

Discussion in 'Troubleshooting' started by bryson bishop, Jul 7, 2016.

  1. bryson bishop

    bryson bishop Member

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    I don't know exactly what's going on. If it's a flow problem or something like that but if anyone knows anything that would help please let me know. Any help is much appreciated.


    [​IMG][​IMG][​IMG]
     
  2. Geof

    Geof Volunteer Moderator
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    Partial clog maybe. Is that pla? Are you using an oiler ? It looks like under extrusion. Did it just start happening or is this out of the box brand new ? As much info as you can gibe would be great
     
  3. bryson bishop

    bryson bishop Member

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    Pla. Using oiler. Just cleaned the hot end about 30 min of run time ago. And it just started happening. I've had the printer for a year. I have noticed that sometimes I can look at the filament entering and the extruder gear and sometimes I can see the gear move and the filament does not go in for a second or so and then it starts back
     
  4. Geof

    Geof Volunteer Moderator
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    Are your tension screws that press against the filament tight ?
     
  5. bryson bishop

    bryson bishop Member

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    Yes I have even taken some extra steps to make it as tight as possible
     
  6. Geof

    Geof Volunteer Moderator
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    Is the hobbled bolts teeth clean? If thats a yes too then there must be an issue in the hotend
     
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Or maybe the extruder motor?
    The stepper driver for it may be going bad.
     
  8. Geof

    Geof Volunteer Moderator
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    I thought he meant the gears move but the filament hesitates. Can you verify the motor is working but isnt able to feed the filament ?
     
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yes, that is how it reads... we just need to make sure that is what is meant :)
    I am with you that this is probably an extruder issue.
     
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  10. bryson bishop

    bryson bishop Member

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    Yes that's exactly what it does. The gear moves but the filament hesitates to go through for a second.
     
  11. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Could be a bad hobbed bolt can you take a picture of it (with the feed open and filament removed - just want to see the hobbed section). Been a long time since Robo had that issue, but they did go through some batches of bad ones.

    Frankly, it is more likely either a partial clog or heat creep. Make certain the fan on the extruder is running fill-tilt to avoid creep.
     
  12. bryson bishop

    bryson bishop Member

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    Here's the Hobbed bolt


    [​IMG]
     
  13. Geof

    Geof Volunteer Moderator
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    Id try cleaning out between all the teeth. That could be causing you issues
     
  14. bryson bishop

    bryson bishop Member

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    Okay I will try that and print again and come back with results
     
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  15. bryson bishop

    bryson bishop Member

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    Okay I have just noticed something before I started printing. I heated up the hot end and started manually turning the Hobbed bolt gear with my and and noticed that every revolution it is like there is a part where it is like the Hobbed bolt is not catching the filament.
     
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  16. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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  17. bryson bishop

    bryson bishop Member

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    Which do you recommend? Or are they both the same
     
  18. Geof

    Geof Volunteer Moderator
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    I havn't had a bad hobbled bolt so I can offer any input but the ebay link provided looks like its well made.
     
  19. bryson bishop

    bryson bishop Member

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    Thanks guys!
     
  20. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    I used one from eBay myself during the original bad-batch-of-hobbed-bolts episode. Still using two of them.
     
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