Continuous warping problem with new 0.6mm nozzle  

Continuous warping problem with new 0.6mm nozzle

Hi all,

I keep having continuous warping problems with my Prusa MK3S+ with Extrudr PLA NX2 after I switched from a 0.4mm to 0.6mm nozzle. I've read from various post that wider nozzles can result into warping more material that needs to cool down which increases warping.

Some changes have resulted into reduced warping such as changing to gyroid and printing slower but it still is warping. I don't want to result using glue each time I print and therefor am asking if there's anyone who has another idea how to improve. I am at a loss and really need some fresh input to not go crazy...

Notes:

• Printing a long and narrow shape (14 cm height / 15 cm width / 2.2 cm depth)
• The warping only becomes worse as the print goes on
• Printing it flat on the bed results into similar warping

My latest settings:

• Prusa MK3S+
• Extrudr PLA NX2
• 0.6mm brass nozzle
• Bed temp: 60°C (first layer 65°C)
• Nozzle temp: 225°C (first layer 230°C)
• Using "0.35mm SPEED u/0.6 nozzle MK3" preset
• First layer height 0.2mm / Layer height 0.35mm / 10% infill gyroid)
• bottom fill pattern: Monotonic
• No skirt
• Fan disabled for first 3 layer
• Brim 4mm

What I tried:

• Clean bed
• First layer calibration
• Dried the filament
• Switched from rectilinear to gyroid
• First layer print slower (from 20mm/s to 10mm/s)
• Print hotter (from 205°C to 225°C.)
• Disabled fan from 1st layer to first 3 layers

Extrudr PLA NX2 Material Recommendations: Print Bed Temperature: 20-60 °C Printing Temperature: 200-230 °C Speed: 20-200 mm/s