Vuông hiệu chỉnh 280x280mm

t=0.4mm (2 layers) and  t=0.2mm (1 layer)
Is your first layer grainy?? then your nozzle is too close to the bed.
Does it has bad adhesion then the nozzle is too far from the bed.
does your first layer feel smooth, and is there an absence of inconsistency, then your first layer is correct!

Designed for Sovol SV06+