Have you printed a xyz cube to test x,y,z size, and is it within your desired specs? This issue is probably more visible because of what appears to be under extrusion. This octagon was printed at 20,30,40,60,80 mm/s (bottom to top). HEMERA PRINT SPEED GENERATORHere is my script: G-code generator to test E-stepper microstepping I’m still not sure if my Hemera has something wrong, or it is just the result of this particular combination with the Ender 3’s stock board. A slanting salmon skin can also be produced when setting the extruder step per mm slightly different from the firmware’s setting.Ĭorrecting the vref to 0.96v helps a little. I can produce a perfect vertical salmon skin when setting the extruder step per mm equal to the setting in the printer’s firmware. The result confirms that the pattern aligns with the E-stepper’s full step. I created a single wall octagon that each side has n * (mm per full step) long. To verify this observation, I wrote a script to generate G-code that will align the extruder’s full step on every layer. It seems like the extruder only moves on full or half steps. I tried to print even slower, and noticed that the extruder pulled the filament in not smoothly. What!! I always think that print slower = better result. The salmon skin pattern stays the same, but it’s much stronger when printed slower. I printed a cube in vase mode and got salmon skin on all sides. Increased vref to 0.7v, calibrated e-steps, etc. Background story: I bought E3D Hemera and wrongly set vref to 0.5v on the stock Ender 3 board.
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