Стекло кривое, или не откалиброван стол от слова "совсем"?
G28 ;Home G29 ;Bed Leveling G92 E0 ;Reset Extruder G1 Z3.0 F3000 ;Move Z Axis up G1 X1.0 Y20 Z0.28 F5000.0 ;Move to start position G1 X1.0 Y200.0 Z0.28 F1500.0 E15 ;Draw the first line G1 X1.4 Y200.0 Z0.28 F5000.0 ;Move to side a little G1 X1.4 Y20 Z0.28 F1500.0 E30 ;Draw the second line G92 E0 ;Reset Extruder G1 Z3.0 F3000 ;Move Z Axis up M900 K{material_linear_advance_factor} M900 W{line_width} H{layer_height} D{material_diameter}