Hi,
First off, apologies in advance if this problem has been addressed elsewhere, I’m just not really sure what title to search for it under.
I’ve been printing for a few months now with a Makerfarm Prusa i3v, and for the most part prints have been of acceptable quality. I’m finding however that on the occasional print (it seems to be fairly inconsistent), at a seemingly random layer the print has issues maintaining the straight profile, causing the bubble-like overflow seen on the neck of the picture attached. It also happened slightly further up on this print, but as you can see the print was fine until the neck, had serious issues, then for the most part managed to recover itself at the higher levels. I haven’t tried a reprint yet, but in the past when this issue happens, if I reprint with the same settings I don’t see the issue again. Does anyone know what my problem could be?
My thoughts at present are that maybe the hotend is making contact with the previous layers while it prints, causing them to melt as the new layer is applied. While I think this makes sense, it doesn’t really explain why it randomly happened 3/4 of the way up the print, then automatically corrected itself.
I’m printing ABS with an extruder temperature of 240 degrees Celsius (which is in the recommended 220-260 degrees Celsius for this brand of ABS).
Any help anyone can give would be greatly appreciated.
Hi, so from the picture it looks to me like over extrusion, what slicer are you using and can you upload pictures of the setting? Also what hotend are you using.
Another thing to check would be the actual print speed. The layers at the top are much smaller and would take less time to print. If you’re still printing at a consistent speed, it’s going to not allow the previous layer to cool enough and thus essentially collapse on itself. Check your slicer settings to see if you can slow down the layers that take less than a few seconds. I have attached screen shots from both Simplify 3D and Slic3r.
