May 27

Retraction Test / Temperature Tower

1 comment

In order to properly fine tune my 2s Dual I am looking for a systematic way to fine tune my printer to perfection especially with regard to retraction amount and speed (both nozzle switch and travel), print temperature and material feed rate.

I read a bit about temperature towers requiring to manipulate g-code files.

Would anyone have tipps on how to approach this. I feel I need a more structured approach than just trial and error for the fine tuning.

Thought about retraction towers for nozzle switch & transport and temp towers as a start... or is there even a beat practice step guide for fine tuning printers (with dual extruders)?

 

 

 

 

 

For temp tower setup I use https://github.com/fchorney/CuraPlugins/blob/master/post_processing_scripts/VaryTempWithHeight.py as a Cura script. It goes into the %appdata%\cura\3.6\scripts folder and you can access it in Cura via Extensions > Post Processing > Modify G-code along with some other scripts. Pick a temp tower of your choice, I like https://www.thingiverse.com/thing:2922338 simple version for my PLA. Set your varytempwithheight accordingly - if using this one, temp increment is 5 degrees, start temp is 190 and height increment of 10mm. Cura should then make the necessary changes to the gcode to get the temperatures right. You only really need one temp tower per filament spool as the properties shouldn't change significantly by the end of the roll - pick whichever temp looks best for overhangs/stringing/etc.

 

Retraction is going to be trial and error no matter how you approach it, there are too many variables for any real structured setup to work - just print stringing tests and increase values until you find a place that works; I have another post on here about stringing that details the steps I took to finally correct it. If your extruder steps are calibrated properly, and you adjust the filament diameter based on your filament roll(measure the diameter with some accurate calipers at several points and positions and take the average, it's likely not 1.75mm exactly), flow rate shouldn't need much if any adjustment imo. Most single extruder fine tuning guides should work for the DSE with the exception of setting up nozzle switch retraction, but any settings without stringing should mean little to no oozing either. I'm still waiting for some more replacement parts to have my DSE fully set up so can't give more details on that front.

 

 

 

 

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