Flashforge Guider II - 9.14 When doing build plate leveling, touch screen prompts Please tighten knobs under the platform when the knobs have already been mostly tightened:

GuiderⅡ User Guide | www.flashforge.com
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speed:40—60mm/s, travel speed:60—80mm/s)
9.14 When doing build plate leveling, touch screen pr ompts
“Please tighten knobs under the platform” when the knobs
have alr eady been mostly tightened: Re-do the pr inter ’s
extr uder calibr ation and then do the build plate leveling
again.
Referring operating video: Extruder calibration
https://www.youtube.com/watch?v=VvjT3Y31IAw