Jump to content
Ultimaker Community of 3D Printing Experts

Cura raising nozzle by 0.4mm before starting print?


Recommended Posts

Posted · Cura raising nozzle by 0.4mm before starting print?

Hello, I notice that despite having my endstop set lower, cura does not lower the z axis as far as it could go when printing the first later.  This is a big problem because I don't get good adhesion whatsoever, nor an accurate base layer, which is essential for starting the print.  If someone more experienced than me could tell as to why this is and how to fix it, I would greatly appreciate it.  I'm a bit of a newbie to cura and really 3d printing as a whole.  Thank you!

  • Link to post
    Share on other sites

    Posted · Cura raising nozzle by 0.4mm before starting print?

    Even if you slice at 0.1mm layer height, the bottom layer is typically 0.27mm or .3mm (depending on the version of cura and which profile you have).

     

    Assuming .3mm:

    So Cura sets the Z height to exactly 0.3mm and extrudes exactly enough for .3mm worth of material.  However I agree it works better if you overextrude the bottom layer.  For some printers like a UMO this is very difficult to do.  The solution is a parameter called "initial layer flow".  You can set that to somewhere around 150%to get a nicely squished bottom layer so your part sticks well.

     

    Or you could edit the gcode file by hand and change the .3 to .15.

  • Link to post
    Share on other sites

    Posted · Cura raising nozzle by 0.4mm before starting print?

    I am currently running a makerfarm pegasus if that makes a difference.  The initial layer flow is a good idea.  I should try that.  If this doesn't work what method do you use for editing the Gcode?  I don't have any software currently that will let me do that as far as I know.  (I haven't even learned any basic Gcode commands to be quite frank.)

  • Link to post
    Share on other sites

    Posted · Cura raising nozzle by 0.4mm before starting print?

    Any text editor will work.  For example on Windows you can use notepad.  Search for the letter "Z".  It will be one of the first 3 Z's in the gcode file most likely.  Something like:

    G1 Z0.27

     

    Which means move Z axis to position 0.27mm.  Or more likely:

    G1 X101.11 Y34.37 X0.27

     

     

  • Link to post
    Share on other sites

    Posted · Cura raising nozzle by 0.4mm before starting print?

    I'm confused.  I can't even see the Gcode itself in cura, so how am I supposed to modify it and then paste it back in?  Sorry if this seems really basic.  It's just something I know next to nothing about.  Are you saying I should try to open the Gcode file directly with a text editor, like notepad or textedit?

    Also, I'm going to be without internet in the woods for the next 4 or 5 days so if I don't reply I'm not ignoring you. 

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 8 replies
    ×
    ×
    • Create New...