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

Mysteries continue (photos)

Discussion in 'Troubleshooting' started by William, Oct 27, 2014.

Thread Status:
Not open for further replies.
  1. William

    William New Member

    Joined:
    Jul 25, 2013
    Messages:
    105
    Likes Received:
    21
    This first layer is printing ultra slow. Any ideas what is causing the diagonal "waves"? Thanks in advance! (I uploaded the full images because they're not high resolution - hope that's OK.)
    IMAG1104.jpg
    IMAG1103.jpg
     
    #1 William, Oct 27, 2014
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,915
    Likes Received:
    7,338
    #2 mark tomlinson, Oct 27, 2014
  3. Printed Solid

    Printed Solid Volunteer Admin
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    1,605
    Likes Received:
    1,003
    I tend to agree with Mark, but I've never seen a really definitive answer to why that happens.
    Seems to be one of two things:
    -You are too close and are building up a little back flow in the nozzle. As the pressure increases and decreases from the buildup, it drops thicker and thinner regions.
    -the other possibility is that you've got 'dirty spots' on the bed. Think finger prints and things like that.
     
    #3 Printed Solid, Oct 27, 2014
    2 people like this.
  4. William

    William New Member

    Joined:
    Jul 25, 2013
    Messages:
    105
    Likes Received:
    21
    OK. That sounds logical. I thought I had mastered the z-height first layer, but maybe I'm going too close. I'll try pulling up a bit.

    Thanks!!
     
    #4 William, Oct 27, 2014
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,915
    Likes Received:
    7,338
    That is a really good idea. I think you might be a shade low (that or a bit of over extrusion). You can run ziggy's test to see if the exrtusion rate for that nozzle is a bit high and tweak.
     
    #5 mark tomlinson, Oct 27, 2014
  6. William

    William New Member

    Joined:
    Jul 25, 2013
    Messages:
    105
    Likes Received:
    21
    I recalibrated the extrusion rate a while back. I was using a different brand of PLA. I'll recheck that also. Thanks for the tip.

    I noted in an earlier post that it's somewhat comical that the extrusion factor's default value is to two decimal places.
     
    #6 William, Oct 27, 2014
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,915
    Likes Received:
    7,338
    Yea, a bit overkill...
     
    #7 mark tomlinson, Oct 27, 2014
  8. William

    William New Member

    Joined:
    Jul 25, 2013
    Messages:
    105
    Likes Received:
    21
    I recalibrated the extrusion rate and it needed it. I started the next print with less squeeze on the first layer. I could actually see between lines onto the white vinyl for that first layer. It's been going for hours now and it looks fantastic. Thanks!
     
    #8 William, Oct 27, 2014
    2 people like this.
  9. Paul Vladuchick

    Paul Vladuchick Member

    Joined:
    Dec 5, 2014
    Messages:
    62
    Likes Received:
    13
    As a total new guy here, How does one calibrate the extrude rate? I think I may need to do this...
     
    #9 Paul Vladuchick, Dec 10, 2014
  10. Mike Kelly

    Mike Kelly Volunteer

    Joined:
    Mar 11, 2013
    Messages:
    6,967
    Likes Received:
    2,277
    Give this a watch:
     
    #10 Mike Kelly, Dec 10, 2014
  11. Paul Vladuchick

    Paul Vladuchick Member

    Joined:
    Dec 5, 2014
    Messages:
    62
    Likes Received:
    13
    Thank You! That was exactly what I needed to know.
     
    #11 Paul Vladuchick, Dec 10, 2014
  12. Mike Kelly

    Mike Kelly Volunteer

    Joined:
    Mar 11, 2013
    Messages:
    6,967
    Likes Received:
    2,277
    Tom does great videos. They're all worth a watch imo
     
    #12 Mike Kelly, Dec 10, 2014
Thread Status:
Not open for further replies.

Share This Page