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

Solved PLA Corner Lift

Discussion in 'General Questions' started by Tim Pilcher, May 4, 2016.

  1. Tim Pilcher

    Tim Pilcher New Member

    Joined:
    Apr 25, 2016
    Messages:
    11
    Likes Received:
    2
    Hi Guys,

    I'm new to the Robo 3D experience so please go gentle.

    I am having problems with corner lift on the bed but only in the top left hand corners.
    I'm not an expert but I think its something to do with the extruder fan cooling down that rear part of the build at a faster rate. The fan doesn't kick in until the first 2 layers are printed but is there a way of switching off the fan until at least 5 layers are printed.

    I'm using Cura BTW and generally run my Robo3D R1+ bed at around 65 degrees.
    I also use hairspray for the sticky.

    Many thanks
    TIM
     
    #1 Tim Pilcher, May 4, 2016
    Last edited: May 4, 2016
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    The slicer controls when/if the parts fan is enabled/on.
    Check the slicer settings and turn it off completely (or for whatever layers it will let you disable it, that is slicer dependent).

    I don't use Cura so I have no specific advice for that slicer.
     
    #2 mark tomlinson, May 4, 2016
  3. Tim Pilcher

    Tim Pilcher New Member

    Joined:
    Apr 25, 2016
    Messages:
    11
    Likes Received:
    2
    Hi Mark,

    Thanks for the reply.

    I tried a few things I spotted on Cura's website regarding the lift.

    Turned off extruder fan completely until the first 5 layers was done.
    I dropped the fan speed down to 40% after the first 5 layers and then up to 60% towards the end of the job.
    Bed temp was 75 degrees and then down 50 degrees after the 5 layers

    This did stop the back left corner from lifting considerably.
    Not sure if I should keep the bed on 75 degrees though because the corner did try to lift towards the end of the job.

    It just seems strange its the same corner regardless of shape of thickness. Its like a stress pull or something like that.

    Thanks anyway.
    TIM
     
    #3 Tim Pilcher, May 5, 2016
  4. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
    Staff Member

    Joined:
    Feb 18, 2015
    Messages:
    5,905
    Likes Received:
    3,593
    You may need to adjust Z_offset just a fraction of a mm to get better bed adhesion. Also try doing the entire print at 50°C bed temperature. It is likely a combination of both that will result in better prints and no curling in the corners.
     
    #4 WheresWaldo, May 5, 2016
    Tim Pilcher likes this.
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Also, drop the bed heat (a lot) like @WheresWaldo says.
    Warp is always heat related and for PLA that is really, really hot.
     
    #5 mark tomlinson, May 5, 2016
    GAmbrosio likes this.
  6. GAmbrosio

    GAmbrosio Active Member

    Joined:
    Feb 22, 2016
    Messages:
    238
    Likes Received:
    79
    75 is ABS range.


    Sent from my iPhone using Tapatalk
     
    #6 GAmbrosio, May 10, 2016

Share This Page