1. Got a question or need help troubleshooting? Post to the troubleshooting forum or Search the forums!

Unresolved calibrating print quality.

Discussion in 'Troubleshooting' started by TKCC71, Nov 15, 2016.

  1. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    Just installed a E3D V6 but noticed the prints are not coming out so good. I decided to print the 20mm cube. Any suggestions on what settings most likely need to be adjusted based on these photos.

    1st photo is the sides
    Second photo is the top side.

    [​IMG][/URL][/IMG] [​IMG][/URL][/IMG]
     
  2. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
  3. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    Well, photo post seems to be a fail. Going off of past experiences, you may want to go through a PID tuning of the hotend and an Extruder Calibration to make sure the e steps are still on point. Have you ever done either of those before? Fairly painless if not. I can post a couple videos if needed.
     
  4. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    Pictures are there now. No never attempted that.
     
  5. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
  6. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    Yep, looks like issues with both. Do the PID tuning first then the extruder calibration. You know how to update the firmware now, so that will help. Just remember to do the M502 and M500 after each update. Hopefully that gets you back in the ballpark.
     
  7. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    I did the first test and I measured the distance and it was 61mm from the 150mm mark. So I told it to extrude 100mm, I guess I only extruded 89 out of 100mm. I was a little confused about the next steps? I ran the M503 but do not know what I was looking at or how to interpret the original settings?
     
  8. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,692
    Likes Received:
    7,323
    Lets say you told it to extrude 100, you measured it and it moved 89.

    That means you are getting 89% of the amount of filament extruded every time you try to print.
    Not optimal :)

    So we do a little math:
    • New Steps/mm = (Old/Current steps/mm) x [100 / (measured distance filament traveled)]
    If you look in the CONFIGURATION.H you should see your extruder steps set to this :

    // default settings
    #define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,800,723.38} // default steps per unit for RoBo 3D R1

    Those numbers are : X/Y/Z/Extruder so the old steps are 723.38

    So new steps = 723.38 x (100/89) --> 812.7865168539326 (why don't we just round this down to 812.79?)

    Set that value:

    // default settings
    #define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,800,812.79} // default steps per unit for RoBo 3D R1



    Compile and upload the firmware with the Arduino compiler and you are done.

    (oh, do the M502 and then the M500 as well when you are done with everything else otherwise you wasted your time)
     
    danzca6 likes this.
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,692
    Likes Received:
    7,323
    Then you can test this by repeating the test and see that when you tell it to extrude 100 mm that you do indeed get 100 mm
     
  10. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    Thanks again Mark, retested after changing the sketch and it came out perfect. Off to try the PID autotune now.
     
    mark tomlinson and danzca6 like this.
  11. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    Well I did all of the above but now my prints are coming like this. I did 2 prints and both did the same. The first layers seem fine then I come back to a mess. Any suggestions?
    [​IMG]
     
  12. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    What kind of filament is that and what were your temp settings? I have never seen that happen after printing so well on the bottom half.
     
  13. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
    I print mostly with PETG. Temps around 240. I printed most of my Iron Man suit with PETG. Never had this issue till recently?
     
  14. Chuck Erwin

    Chuck Erwin Active Member

    Joined:
    Aug 27, 2015
    Messages:
    202
    Likes Received:
    136
    Did you check the tension on your belts?
     
  15. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31

    That's kinda what I was thinking but was wondering how can you tell if they are good or bad? I can press down and feel a little bit of flex?
     
  16. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    or a loose pulley
     
  17. Chuck Erwin

    Chuck Erwin Active Member

    Joined:
    Aug 27, 2015
    Messages:
    202
    Likes Received:
    136
    Well they should have a little pluck to it but not super tight. Don't forget there are two belts to check one is under the bed.
    Plus if they are old you may want to replace them.
     
  18. TKCC71

    TKCC71 Member

    Joined:
    Mar 24, 2016
    Messages:
    75
    Likes Received:
    31
     
  19. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    I've heard from some YouTubers like Tom say that adding those spring tensioners to your belts can also add backlash. You can give them a try, but just keep that in mind. Here is an example of ones I've see folks use http://a.co/feLQVuI
     
  20. Chuck Erwin

    Chuck Erwin Active Member

    Joined:
    Aug 27, 2015
    Messages:
    202
    Likes Received:
    136
    The teeth do wear down and can slip a little causing problems.
    Well hopefully you don't have the problem I had Prints were coming out really bad.

    My Robo3d was a refurb and it is getting old. I probably abused the hell out of it getting parts off. I cracked the one of the end pieces and had to print out another one. Then my prints where really bad.
    Finally I took a level to the bed and was shocked to see how far out of level from end to end was , so I shimmed it up to where it was level.
    20161119_085225.jpg
    Too make a long story short after you checked all the other settings it maybe mechanical.
     

Share This Page