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My SV04 can be coaxed into printing reasonably. The frog is a clean 2 color print with minimal cleanup. However the KSR FDM tests reveal the my SV04 is very bad at the negative space tests; only the widest space allowed the peg to drop out. The alignment of the nozzles was tricky but, once set, it did not need re-work. This cannot be said for the the z axis. The z axis offset required tuning every time I changed filament. It also seem to need tuning every 2 days even using the same filament. I don't know if this is due to the gantry being wider at top than at the bottom or because the E2 extruder stepper motor is mounted on an angle from the x axis extrusion. Though I am sure this defective mounting of the stepper has caused fraying of the E1 x-axis belt after just the few prints you see above for it contacts the E2 pulley while printing.
If it were not for the defective mounting of the E2 stepper motor and the out of square of the gantry I would keep this solidly built SV04. I would replace the magnetic printing surface immediately and after the year warranty replace the mother board with the appropriate Big Tree Tech 8 channel board available and configure standard Marlin IDEX firmware or even go Klipper for the fundamentals of the printer appear that they can provide Klipper speeds. However even though I could see the Solvol support team means well and they reply to my emails reasonably quickly, they do not appear to have the English language skills necessary to understand the gantry and stepper motor mounting problem. That, and they have a primitive email support infrastructure that even caused one Sovol team member to believe that I was asking for support for a SV06 not a SV04. Sovol support would be vastly improved if they simply install a Mozilla Bugzilla.
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