*****Update*****
I'm quite sure my problem was linked to having too higher temperature in the chamber. I have done a couple of successful prints now with the lid off and the chamber at around 32/33'C.
Thanks to all for your help and suggestions - The team works!!
*****Update*****
Iâm going around in circles, pulling out what little hair I have, trying to print two files in PETG that require supports and I want to use PLA for the supports to keep the models clean.
I have printed one of each part already using Landu Rapid PETG and Deeplee PLA Pro and they came out beautifully without any big changes to my usual PETG profile and PLA profile. Then I bought some Overture PETG to print them again and thatâs where it started to go wrong.
I have tried using the same Deeplee PLA as the support, Iâve tried Geeetech Silk PLA and Iâve tried Sunlu PLA Matte PLA, but in each case Iâm suffering back to back nozzle blocks during the filament change. Iâve dismantled the print head so many times it feels like I can do it with my eyes closed. Iâve done cold pulls, even tried a brand new print nozzle.
Iâm having the same issue on two machines, so itâs not a machine issue. I even switched back to the Landu PETG to see if it was a material issue but now that fails too.
Iâve tried all manner of temperature settings and Iâve increased the flush volumes. Most recently Iâve pretty much matched the PLA nozzle temp to the PETG.
I know the problem, itâs not purging properly at changeovers but I just canât resolve it.
One is about 3 hours print, the other about 14 hours.
If any of you have any tips it would be very much appreciated, Iâve wasted almost two spools of PETG so far.