Really? That means, it is a used one, right? How many printing hours does it show on the "Runtime stats" menu? Does it have an enclosure or at least a front door? While not strictly necessary it's highly recommended for ABS prints.
From your pictures i would say: it's either (partially) underextrusion, poor layer bonding (because of the fans or too low temperature) or temperature fluctuations.
yes it is used, but based on the stats it wasn't used much at all and I was able to talk the guy down to a measly $200(which was a steal for this machine) so although in the realm of too good to be true, I figured it was worth the risk as it appeared to be in new condition and the seller didn't seem very educated on the machine itself.
Stats show:
Machine on for: 330:10
Printing: 183:03
Mat: 125m
The housing has back and side enclosures... the top and front are open. But I have a plastic bag draped over the top to preserve some heat and I setup the machines on this side of the room to prevent drafts from the air conditioner. The entire time this print has been going the AC has been off, and the room itself is pretty warm.
Looking at the print in its current ongoing state, i do see a little bit of a split in one layer... this might have happened when I tuned the settings and turned off the fans? I dunno.. but based off that split, its possible it is poor layer adhesion or under extrusion. Although Ive been printing with my Zortrax for almost a year now.. being that the software for slicing on that machine is closed source and print options are limited, I haven't had to tweak and troubleshoot my prints on it. Its been extremely reliable and all I have to do is preform regular maintenance. That being said Im not very educated on how to combat under or over extrusion and have at this point been winging it. So any help would be appreciated.