Printed a calibration cube, results below.I ended up having 15mm/s in every field in Print settings -> speed. If everything else fails, try going slower.If you're getting first layer underextrusion, try some Live adjust Z during prints, and see if anything changes. I had problems with first layer underextrusion, turns out I made the calibration badly I should've trusted the calibration I made with PLA filament before all this.Created a set of settings in PrusaSlicer reflecting what I learned, created also a separate printer profile, material profile and set the temperature accordingly, only for this purpose.I might have overdone it, but I am already satisfied with the result, and I would rather have a bit of extra lines on the sides than the cube being not rigid and/or separating. To compensate for the cura slicers' wall overlap, I did give an extrusion multiplier to my material.made sure my Prusa Mini extruder upgrade from Bondtech (Different extrusion GCODE) is included in the printer settings.Keep in mind filament says 200☌ -230☌, according to the manufacturer from the results I got that 9mm retraction is the setting I want to go with also, the temperature settled at 233-235.I found conflicting information online some people claimed it prints so slowly that you could have your fan on 0%, but I disagree prints cleanly only on 100% speed. from the video I have learned that TPU prints slow, but it still requires fans.making a temperature tower, like the video instructed (make sure to double check after how many layers temperature switches, it was wrong to me).making a retraction tower, like the video instructed (make sure to double check after how many layers retraction distance switches).Download newest CURA and add the temperature/retraction towers add-on like instructed, to generate proper GCODE files for calibration.Overall probably like 10g-20g of expensive TPU filament "wasted", but it helped me learn a lot about how to print with it. Next, I printed a temperature tower, and for my TPU (S-FLEX from Spectrum, black color) I found the optimal temperature to be 235 ☌ first layer, 233☌ all other layers. I printed a retraction tower, which shown me that 9mm/s should be best, but possibly even 10mm/s would be OK could test that further. It was a big selling point to me in terms of the Bondtech extruder upgrade which I ended up getting, but I actually never tried to do it on the stock extruder. ![]() I'd be interested to see if anyone on the stock extruder managed to print TPU? If you have had any experience printing TPU / flexible filament on the MINI, please share your experiences! This post & thread I think can be of help to someone. The guide is over here and it has a very scientific approach. I wanted to share with everyone a cool video that helped me calibrate my Prusa Mini+ slicer settings well enough to print TPU with it. ![]() TPU Printing with Prusa Mini - share your experiences!
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