Submitted 1 week ago by jokeyrhyme@lemmy.ml to 3dprinting@lemmy.world
I’ve been noticing some delamination (layer separation), but only on solid infill and top layers, and only on larger surfaces
Initially, I tried reducing speed, but didn’t notice any improvement
There are no noticeable issues on short lines, so I think this is something to do with acceleration, which I didn’t realise was a thing, but there are indeed settings for this in OrcaSlicer
Something to consider perhaps, Just a SWAG
Printing temp? Too low of printing temps can cause poor layer bonding.
Air currents. This is noticeable on open bed printers the most. But even enclosed printers can have issues with cooling fans being on too long and at too high of a speed.
for this 230C - 250C PETG filament, i’m already at 250C (but i’ve been contemplating bumping it up to 255C)
Is the bed enclosed? I had an older open bed printer and enclosing it solved delam issues for large surface area prints
No, it’s an open bed slinger I think my next printer will be something enclosed
teotwaki@lemmy.world 1 week ago
I’ve been seeing your posts on Masto, but I guess I’ll reply here.
I don’t know what printer you have, and I don’t know if the feature works for all printers, but could you try and use PrusaSlicer to visualise the print where the issue presents itself. More specifically, you could get some interesting data from the “actual print speed” view. That way you can see what speed the printhead reaches.
However, based on your description:
Could you be reaching the limit of what your printhead can melt? Would it make sense to calculate the actual flow through your nozzle at those high speeds? Finally, how much part cooling do you have setup? Have you tried a skirt to keep the temps more consistent?
jokeyrhyme@lemmy.ml 1 week ago
okay, just viewing the job layer by layer, i can see that the first solid infill layer after the sparse infill is treated as an overhang/bridge and triggers 100% cooling fan (otherwise it’s at 0% for the rest of the print)
and i on some items, i can see where the delamination on this layer caused problems on the next couple of layers on top
but, on other items, there’s still delamination happening on the very top layer even without any issues beneath it
teotwaki@lemmy.world 1 week ago
The very top layer would also have high cooling fan, no?
It could be your cooling fan is just waaaay too powerful, and causing the plastic to not flow and bond correctly to the lower (or following) layers.
jokeyrhyme@lemmy.ml 1 week ago