String test gcodes for Ender-3

thingiverse

This is a stringing test piece I created, the 40mm distance between the column centers is a good distance to fine-tune the retraction settings. I included the STL if you would like to slice it yourself. The G-Code files are made for my Ender-3, but i think it is compatible some other printers too (I am not an expert, so I cannot say for sure). The first layer is set to 240 C° hot end and 80 C° bed, then the rest of the layers are on 220 C° hot end and 70 C° bed. If you want to change these temperature settings, open up the G-Codes in a text editor and change the values at the following gcodes: Bed: M140(first two instances), M190 (one instance) Hot end: M104(first two instances), M109 (one instance) Once edited just stick it on an SD card and off you go. The attached g-codes have descriptive names, so it should be straight forward which one you select. The retraction speeds range from 20 mm/s to 50 mm/s. There are two prints for each speed: One from 0-4 mm and one from 5-9 mm. Each of these change retraction distance every 25 layers (5 mm) so 0-4 mm 0.4-5.4 mm layer 2-27: 0 mm retraction (the base is 2 layers, 0.4 mm thick) 5.4-10.4 mm layer 27-52: 1 mm retraction 10.4-15.4 mm layer 52-77: 2 mm retraction 15.4-20.4 mm layer 77-102: 3 mm retraction 20.4-25.4 mm layer 102-127: 4 mm retraction 5-9 mm 0.4-5.4 mm layer 2-27: 5 mm retraction (the base is 2 layers, 0.4 mm thick) 5.4-10.4 mm layer 27-52: 6 mm retraction 10.4-15.4 mm layer 52-77: 7 mm retraction 15.4-20.4 mm layer 77-102: 8 mm retraction 20.4-25.4 mm layer 102-127: 9 mm retraction I printed all of these codes so I can confirm that they work. With these tests i was able to visualize which combination of speeds and distances work better for different filaments. I know it might be simpler just to set up the whole print with one setting and print all of these individually, but i think this way less filament is wasted, plus it is easier to see the difference between settings. Comment what you think of, share pics how they came out. Happy printing!