Printing with Polypropylene (PP)
I have a core one+ and I've been struggling some with getting PP print quality up. I know it is one of the more picky ones so I've been going through calibration prints to tweak settings in Prusa slicer. I started with a generic flex profile. I did the temp tower and it seemed to have the best quality at 265 C nozzle temp (I left the first layer at 240 C as I've seen references that starting lower helps). I have the bed at 80 C and the nominal chamber temp at 30 C. I'm now doing a retraction test print and still getting the stringing. bumping the retraction length up to 2.5mm (retraction speed is at 40 mm/s and deretraction speed at 25 mm/s) helped some and so far produced the best result. However I still have some stringing at the lower part of the two towers. Is it unlikely to get rid of all stringing for PP or are there additional tweaks I can make? What settings have worked for others printing PP on the core one? Thanks!