Congratulations Gordon. That's a fantastic result. Perseverance clearly pays off! Thanks for sharing your settings, I'll be giving them a try!Hi Darren,
Well, my printer was busy all day yesterday, but I'm pleased to report that I now have a totally unwarped PETG print. I'm happy now!
Here's my setup for your info - Creality Ender 5 printer fitted with a Micro-Swiss direct drive extruder and all-metal hotend. Creality glass bed fitted and that has a self-adhesive PEI sheet from Banggood stuck on it. The PEI sheet is then given two coats of Tesco 'value' hairspray. Bed temp set to 85C, hot end to 240C, with first layer at 245C. Print speed is 50mm/sec and layer height of 0.2mm. Ensure your first layer is getting a good 'squish'. I tried Pritt stick on the PEI - didn't work for me. NO print cooling used and when print is finished, allow bed to cool to ambient before removing it. I've also just reprinted a part for another model with which I had three warped prints previously and have now got a perfect print of that part, too.
I had been using Asda value hairspray on a glass sheet previously. Clearly I need to switch to Tesco!
I have to say I'm not too shocked that you ended up with your cooling off. That seemed to have the biggest effect on my results and was the first thing I was intending to dial back on my next attempt.
Fantastic work. When I change the filament out, I'll benchmark your settings on my printer and see what sort of results I get. I'll report back!