Extruder/Bed temperature for first layer
I have been trying to fine tune my 1st layer and am a bit confused. In the official Slic3r manual there is this statement in the first layer section:
Higher temperature.
The extruder hot-end and bed, if it is heated, can be made hotter for the first layer, thus decreasing the viscosity of the material being printed. As a rule of thumb, an additonal 5° is recommended.
This makes sense to me as a more viscous extrusion would spread slightly more and offer more surface area which should equate to better adhesion.
BUT... in the PET profile in the Slic3r PE edition, the filament settings call for a 5 degree LOWER temperature for the extruder and bed during the 1st layer.
Can anyone explain the theory behind these settings?
Re: Extruder/Bed temperature for first layer
So the pet does not stick too well to the pei sheet !
Re: Extruder/Bed temperature for first layer
ya careful with pet it can stick too well.. ive made a few almost transparent dice. they have trashed many of my poor wanhao bed... that poor thing takes all the beating..prusa gets babied compared to it. if I print pet I use blue painters tape. at least trying to go clear pet
I have a Prusa,therefore I research.
RE: Extruder/Bed temperature for first layer
So the pet does not stick too well to the pei sheet !
I only use the textured steel sheet with PETG, so I should be safe with the higher first layer temperatures then?
RE: Extruder/Bed temperature for first layer
I print PETG on the textured sheet with varying temperatures depending on the PETG, some at 230 Deg and some at 255 Deg, my bed temperatures start at 85 and rise to 90 for the rest of the layers, my first extruder layer is usually 5 degrees higher than subsequent layers.
EG Rigid Ink PETG, First Layer Filament = 235 Bed = 85 Layer 2 and up Filament = 230 Bed = 90
Technology Outlet T Glass, First Layer Filament = 250 Bed = 85 Layer 2 and up Filament = 245 Bed = 90
Here is a print I just did yesterday:
Normal people believe that if it ain’t broke, don’t fix it. Engineers believe that if it ain’t broke, it doesn’t have enough features yet.