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Cura helpers

by Dave57000

Hi all
just a quick one does anybody know how to turn off curas helpers I'm trying to print a box with bumps on the bottom in petg and cura insists on putting some sort of support that it calls helpers round each of the bumps which then makes the bottom of the box flat again as they won't come off which is not what I want, I know the printer can cope with the bridging between the bumps because I have successfully printed this box in the past with ideamaker but over the last few months I have been trying to change over to cura, so would love to be able to turn off the helpers but have been unable to find any reference to doing this on the Internet if anyone can help I be most grateful

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Prints not Centered using Cura

by Lightboxx

can someone have a look at this bug report i wrote on github and tell me if this is affecting only me.


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Cura - Printehead going over already printed areas? NOT COMBING

by Lightboxx


i have an anycubic mega i3 for a few month now.
i have done a few dozend prints but i have not dived deeper into the cura settings.
i play around with a few basic settings but im far from using cura to it´s full potential.

today i noticed that the printhead is going over already printed areas but does not lay down any material.

i know that ironing is supposed to give the model a better, smoother outer surface.
but i checked and ironing is completely disabled.

as the structure the printhead was going over are inside the model i wonder why it is doing that and if i can disable this, to save time?

i have seen this behavior with cura 4.4.1 and 4.6.1 (windows version).

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Vertical split in solid objects

by ColinWatters

I'm having problems printing solid objects (for example a solid strip 6mm x 6mm x 200mm long). To print fast I'm not using thin walls and 100% infill, instead I'm trying to print thick walls (>3mm) and setting the infill to 0%.

The problem is I'm getting very weak joints where the walls meet down the middle of the strip, If I try and bend the strip it splits down the middle vertically. Bit like weak layer bonding but in the vertical plane!

If I print a curved/U shape strip one side of the U will have this problem and the other not. Its almost as if there is some sort of rounding error in Cura that means the walls touch nicely on one side of the build plate but not on the other.

I didn't create the .stl file I'm printing so I'm thinking that the strip might be a fraction over 6mm wide so that its not an exact multiple of the 0.4mm line width and cura is rounding down the number of lines leaving a tiny gap down the middle?

Any ideas?

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Cura 4.5 and linear advance

by Sergiu_I

I spent some time trying to see how the linear advance M900 Kxxx flow correction coefficient improves or not the printing quality using Cura 4.5.

Jumping to the conclusions: the results were very disappointing. I have used PLA, a pre-measured K coefficient, the linear advance plug-in that lets you put directly the K coefficient as parameter in Cura or directly the M900 line introduction in G-code and as test model the well known xyzCalibration_cube.
With default PLA settings, with customized settings, whatever, looks like Cura tries somehow to pre-solve the flowing issue and using a defined K it is just too much - it turns the flow quality near the edges in a real mess - all edges are rounded and show obvious deposits of excessive material. Using two different other slicers, a predefined correct K in the g-code has clearly improved the final quality!

Drawing the line in Cura:

  • the default quality is acceptable, edges show a minor excess flow issue, quite visible but not critical.
  • using coasting (default 0,064mm3 - ca. 0.6mm displacement for 0.2/0.5 extrusion - the quality improves (the cube on the LHS in the picture) IF the correction is applied from an initial flow of 0,2mm3 - the default 0.8mm3 min limit is a silly defined value - kills the edges for all the details on geometry under 10mm.
  • defining a linear advance K coefficient just turns the final geometry in a mess - rounded edges and bulky material deposits near the edges.

Of course linear advance V1.5 activated in firmware (Marlin 1.1.9), K obtained as per: https://marlinfw.org/docs/features/lin_advance.html
Any other experience with linear advance & Cura?

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