Vertical ribbing/lines
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Yeah, tried that, still no luck. The issue actually becomes worse the slower the machine prints. It's really odd.
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It could be friction in the printer mechanics. Command a long slow movement in the X or the Y direction, and watch the movement to see if it is smooth.
What are the X and Y steps/mm of your printer?
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I have not seen this before either, except on corners when the acceleration is not tuned well to the printer mechanics. How does printing in different layer heights change it?
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It could be friction in the printer mechanics. Command a long slow movement in the X or the Y direction, and watch the movement to see if it is smooth.
What are the X and Y steps/mm of your printer?
M92 X43.96 Y43.96 Z426.67 E175.0
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I have not seen this before either, except on corners when the acceleration is not tuned well to the printer mechanics. How does printing in different layer heights change it?
Printing in higher layer heights is a definite improvement
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Those pictures were 0.1 layer height.
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I have not seen this before either, except on corners when the acceleration is not tuned well to the printer mechanics. How does printing in different layer heights change it?
Printing in higher layer heights is a definite improvement
In that case it could be extruder pulsing, which you get with the low steps/mm of ungeared extruders. Divide the filament cross sectional area by the layer height, extrusion width, and extruder steps/mm. That will give you the extrusion distance per extruder microstep. Compare that with the separation of the ridges.
Another test worth doing on a CoreXY machine is to rotate the cube 45 degrees about the Z axis and see whether the ridges are still there.
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43.96 steps/mm is lower than any printer I have ever seen for X/Y axes. Has the printer been modified?
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That is how it comes from the factory. It uses a spectra string drive setup.
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I have not seen this before either, except on corners when the acceleration is not tuned well to the printer mechanics. How does printing in different layer heights change it?
Printing in higher layer heights is a definite improvement
In that case it could be extruder pulsing, which you get with the low steps/mm of ungeared extruders. Divide the filament cross sectional area by the layer height, extrusion width, and extruder steps/mm. That will give you the extrusion distance per extruder microstep. Compare that with the separation of the ridges.
Another test worth doing on a CoreXY machine is to rotate the cube 45 degrees about the Z axis and see whether the ridges are still there.
I printed a 3D benchy rotated at 45 degrees and it does make a massive difference in quality. Given this discovery what does this point the problem to?
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I might be completely wrong but when I started building my CoreXY, I was told that if I tightened the belt(s) too much I would get lines on the parallel side of the axe that require the most resistance…
I am only posting this since it's pretty close to what I am reading.
Thanks for the tip. I could try loosening up the string tension. The principle should be the same as a belt.
