I’ve hit a strange problem with my 3D printer, basically what is happening is when it prints out a large surface area (approximately 5-8cm squared) the solid infill curls upwards and creates huge horrific ridges which the nozzle catches onto them.
The plastic i’m using is PLA from Excelvan and oddly enough that, from what i know, it needs constant cooling to prevent small overhangs from curling and my solution was to put the fan at max after the first 3 layers. Unfortunately this is the reason why the solid infill curls up and so far I have no idea why it’s causing the problem other than overcooling the plastic around it.
The photo below is my setup and it prints the 3DBenchy alright but it can but I can never manage to use the auto cooling in slic3r as it would not turn on during overhangs.
Any explanation about why this is happening is welcome, because who would want to babysit a 3D print with large surface areas for 2 and a half hours?
@David_Sherwood did a few tests on the 3D benchy with the new config and it had more problems than before, the overhang perimeters curled up, nozzle catching on it, and the cooling tower ended up a huge blob of mess.
I had a very similar issue on some of my prints when I tried to use less heat on the print bed, have an aluminium bed with blue tape on it, using 100°c it’s all good with PLA but when I dropped to 50 or lower I get the same issue you’re seeing. So I went back to 100°c print bed and all good again
@David_Sherwood This is the print I was doing for a secret santa gift and by the green lit area is where the layer lifted and caused skipped steps evident by the top of the emblem. I’m printing at 190°C with 1.07 extrusion multiplier, at the time it was blasting max air straight at the nozzle tip but as soon i heared skipped steps I moved it immediently away from the 3D print and seemed to solve the problem. missing/deleted image from Google+
@David_Sherwood print adhesion is actually very solid with the glue stick and the pla doesn’t peel off it at all during printing. It’s when it’s hits the 3rd layer (when the fan enables) does the problems arise.
Bed temp is at 55°C though and the Z isn’t squishing on the plate too much but at the correct extrusion width
