I just downloaded Lulzbot Cura 2.6.52 (Mac) to play around with. I had been using Cura 21.03 and recently 21.08.
I wanted to try a print with Cura 2.6.52 and have about 4 or 5 rolls of eSun HIPS filament I would like to use. I see no filament profile for eSun HIPS, just one for Village Plastics HIPS. As far as I can tell the profiles for eSun and VP HIPS were the same under Cura 21.0x.
If I choose “Custom” so I can have a look at the temperatures, I’m a bit fuzzy about some of what is displayed. What is the “Default Printing Temperature”? It’s shown in this profile as 200˚C, but that number appears to be unrelated to anything I use for printing HIPS. What is the difference between this and the “Printing Temperature” (which shows 240˚C, as I would expect for HIPS)?
The Build Plate Temperature in this profile shows 85˚C, but I’ve always used 110˚C for HIPS in the past (and that is what is on both the eSun and Village Plastics HIPS profiles included with Cura 21.0x). I tried printing Benchy using the the default settings for HIPS (Village Plastics) in high detail. At a little over 1mm Z height (just switched from solid printing to the first couple of layers of 20% infill), the model broke loose from the build plate. I restarted with the build plate set at 110˚C. It’s now at 7mm Z height and still attached.
I’m wondering if there is a good reason to go to the new 85˚C build plate temp and tweak other settings for better adhesion. (I had bumped up the Z offset to combat too much adhesion and dragging the head through the first layer a while ago - maybe I went too far?)