NylonG - Great looking prints but structurally weak



  • Hello,

    I am trying to tune in NylonG on an Ender 5 Plus w/ a microswiss hot end. I am getting great looking Bechy_3d's. They have minimal stringing and very visible details. However, they are structurally weak. The sides of the hull can be easily torn off, along with the cabin roof.

    I am using a sunlu dryer at 55 deg C overnight and spooling the filament directly from the enclosure to the printer. There are no adhesion problems.

    I am printing at255C, bed temp is 65 C.

    Any sugeestions?



  • I may have to wait until winter to figure out if it is the humidity.



  • Also hope you are printing with an abrasion resistent nozzle. Like a ruby or at least stainless steel



  • I'm using a a MK8 harden steel nozzle from micro swiss. It is holding up so far.



  • @thwclw I'll try increasing the temperature. My thermistor is stock - soI ordered Slice engineering PT1000 RTD for my nozzle. It is spec'd to 300 C . I'll let you know how it works out.


  • Global Moderator

    @hamplanet000007 The Sunlu dryer is not adequate enough for drying Nylon. You must bring the temperature of Nylon up to 70-80C for 24 hours. This may seem excessive, but for manufacturing, I maintain this level for 5-7 days before I print. After my spool is completely dry, I then add it to the Sunlu at 55C for printing. The Sunlu does not displace air, and you really need a dryer with convection heating like the Matterhackers printdry sysystem.

    If your printed part is structurally weak, more than likely you have poor layer adhesion. Printing at 255C is too low of temperature, especially for a composite Nylon. Printing at 270C and 90C bed temperature will yield a stronger printed object.



  • I have an update.
    I upgraded my thermistor and firmware (TH3D) and tried a NylonG print again. I let it sit on the plate over night (like intj123 suggested ) and it produced a structurally strong print.



  • I have an update.
    I upgraded my thermistor and firmware (TH3D) and tried a NylonG print again. I let it sit on the plate over night (like intj123 suggested ) and it produced a structurally strong print. I am going to share this thread https://forums.matterhackers.com/topic/8048/nylong-great-looking-prints-but-structurally-weak/7 floridaloteryresults .com to my kith and kin who want to know about that.



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