Jump to content
Ultimaker Community of 3D Printing Experts

GCODE Z-offset


amadois
 Share

Recommended Posts

Posted · GCODE Z-offset

Hey guys,

 

I'm having some trouble with a fresh installation of Cura 3.1. When slicing my model Cura inserts a G0 (move) code and moves the nozzle 0.3mm upwards.

This causes the filament being painted too high, thus it has no contact with the heatbed.

 

When removing the 0.3mm offset everything works fine.

 

Does anybody know what's the problem here?

 

Thanks in advance

settings.png

gcode.png

  • Link to post
    Share on other sites

    Posted · GCODE Z-offset

    So Cura assumes that Z=0 has the head touching the glass and because your first layer is 0.3mm thick (that's the default bottom layer thickness even though the remaining layer heights are all 0.1mm).

     

    So is there a way to level your head closer to your bed before starting the print?  If not you might be able to do:

    G0 Z0

    G92 Z0.3      ;tell marlin that we are now at position z=0.3 even though we know we are at position z=0.

  • Link to post
    Share on other sites

    Posted · GCODE Z-offset

    Thanks for your reply.

     

    Thanks for the hint. As it turns out Cura sets the initial layer height to 0.3mm which produces the error.

    Setting the value to 0.1mm solves the problem.

     

    Is it correct that selecting the 0.1mm profile sets the initial layer height to 0.3mm?

    To me this looks like a bug. Who would want that?

    cura.png

  • Link to post
    Share on other sites

    Posted · GCODE Z-offset

    It's definitely not a bug.  If you want the initial layer height to be 0.1 then it sets Z to 0.1 so the nozzle is 0.1 off the glass so there is room for a 0.1mm layer.

     

    If you set the first layer height to 0.3 then it sets z to 0.3 so the nozzle is 0.3 off the glass so there is room for a 0.3mm layer.

     

    So be aware that not only will you have the first layer starting closer to the bed, you will ALSO have 1/3 the extrusion because 0.1mm is 1/3 0.3mm and so you are getting 1/3 as much filament coming out of the nozzle.  So I'm not sure you are done with your adjustments.  I still think you need to level better such that Z=0 has the nozzle touching the bed.

  • Link to post
    Share on other sites

    Posted · GCODE Z-offset

    Okay, I understand that point.

     

    Actually I'm a bit confused about what you say about the leveling process. I learned that I should level the nozzle about the height of a receipt over the heatbed but what you say makes much more sense to me.

     

    Thanks a lot for your help!

  • 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

      • The Ultimaker Showcase — October 14. What's new?
        Your dear friends at Ultimaker have some exciting news and insights for you!
         
        • 0 replies
      • 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...