When i print this on my new SV04, at height +/- 26cm, their is a distortion
This first print had a second color logo on it.
Starting at height +/- 33cm the model is correct again.
I started a second print (now with only 1 color - left extruder), and it shows the same distortion starting at +/- 26cm
(I stopped this second print to save some filament)
Check the gantry geometry (red lines should have equal distance).
Check that all bearing rollers on Z-axis can travel with equal pressure - if not use the excentric rollers to adjust.
Ensure that the travel paths of bearing rollers are free of obstructions & dirt (blue areas).
Check the geometry of the Z-axis threads (green): Ensure that the rods are not twisted by holding a ruler or any straight surface along whilst turning the Z-axis by Z-movement.
Gantry at the bottom is 2mm less wide than at the top.
bearing looks ok (what are the excentric rollers ??)
no dirt
green threads seem ok, but at the top they can wobble +/- 2mm in all directions. see this photo
The red arrow shows the gap. The opening is +/- 2mm wider than this bearing.
Is this space normal ??
As for the print itself, the error is completely around the print, not just 1 side.
I measured the distance at the red line: nearly 2mm.
My suggestions: If you’re still within warranty write to Sovol, how they intend to fix that geometry problem of your gantry. Otherwise build such a piece of 2mm aluminum plate & insert it at the bottom between gantry and frame.
After fixing the gantry geometry adjust all bearing rollers on Z-axis. It is described on Page 3 “Eccentric Column Ajustment” in the SV04 Operation instruction that came with your SV04 SD-Card.
The play on top of the thread rods is common.
Another thougth: Maybe the distortions result from gantry vibrations at resonance frequencies.
Try to place the filament spool anywhere else than on the gantry. This will reduce mass & unwanted vibrations.
Thank you very much for these suggestions.
I’ll report back when i’ve done this and tested it. And i will implement the rear frame braze you suggested. (already started printing the parts tonight)
