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Cura with Snapmaker 2.0 Printer - Custom Nozzle Size


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Posted · Cura with Snapmaker 2.0 Printer - Custom Nozzle Size

Hi all,


I've been successfully using Cura with my Snapmaker 2.0 A350 printer for some time now. The printer comes with an 0.4 mm nozzle and I would like to do some very fine printing using an 0.2 mm or 0.1 mm nozzle. I have setup 2 new printer profiles in which I have edited the "Nozzle size" parameter under the "Extruder 1" tab in Cura but I need to know whether I should make any changes to the printer or extruder G-code to adjust the transmission rate of the extruder to prevent it clogging when using a smaller nozzle. 


I am willing to experiment (at my own risk) but have no idea where such G-code changes should be made. Can anyone help or advise me?


See screen captures below for my printer/extruder definitions.


Thanks in advance


JP, the model boat guy


Snapmaker Printer Tab.jpg

Snapmaker Extruder Tab.jpg

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    Posted · Cura with Snapmaker 2.0 Printer - Custom Nozzle Size

    If Cura knows the Line Width, the Layer Height, and the Filament Diameter (an accurate measurement), then that's all it needs.  No matter what the nozzle size is, it is the volume required by an extrusion and the volume of a length of filament that drives the E numbers in a gcode file.  You will want to make sure your E-Steps are close to perfect.  The small nozzle is less tolerant of minor differences.


    I haven't printed a lot with a 0.2 but I noticed the retraction settings needed to change.  The smaller hole doesn't allow for quick response backward and so I needed to lower the retraction speed in addition to the retraction distance.  I would start with a lower print speed as well.


    It's all a balancing act and your printer is different than mine.  Once you scrap a couple of pieces you should have a good idea of what works well.


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