My makeshift heated chamber. It’s only just too cold to print abs without it cracking here in Queensland Australia. Hopefully this will be enough heat deflection.
It does look like ABS to me, in which case the heat from the hotbed is more than enough to keep the temperature up in an enclosure. I remember @Sanjay_Mortimer mentioned experimenting with turkey roast plastic wrap, I have used the silverish reflecting emergency covers (bought mine from CHina for a couple of dollars) - apart from the rustling it has been performing well. Problem is, if your wrap is good enough the motors start to warm up as well, but that’s the next story…
It didn’t help, I am starting to think it is this ABS that I have or maybe the spool is pulling up the x carriage throughout the print.
I’ve tried very similar things. I have a blow heater keeping a room stupidly hot. Aimed so that there’s as little airflow near the printers as possible. Heated bed at 120C instead of 90C. Works fine for ABS, is absolutely needed else I am guaranteed warping… The up! Can’t even get a few layers down without warping, let alone my reprap in this weather (5C). Even with that, polypropylene is still causing issues… The magic on the summer 35C sun cannot be beaten for that plastic.
Keep trying.
@Daniel_Fielding that looks like a problem of inter-layer bonding to me. Try upping the temperature a bit, 2-5 degrees maybe? You don’t really need to get the room hot - I mean, my printer is next to a window and it spent all winter this way, down to -30. OK, maybe I didnt open the window too often at that time but I sure never had problems with layer bonding.
On the other hand the gaps do seem to be repetitive - check the whole feeding tract, could be an oval gear on the hobbed bolt, or maybe your spool has spent time with one side up and dust has accumulated there, can’t say.
Try over extruding too. May only need 5-10 percent. Of you aren’t getting enough plastic out your layer fusion will suffer. Don’t be afraid to try 15-30% over either. Your nozzle might drag but if your layers bond you know your on the right track.