I'm looking for some advice on what to check in regard to a print which is delaminating and falling to pieces mid-print. First clue I can print one copy of the item perfectly If I print 4 copies, delamination occurs (tested twice) Here's an image of a completed single print. And here's an image of the 4-copy print just after failure: So, first question. What does a single copy success and multi-copy failure hint at for a problem? I've printed other items in large numbers of copies with no issue, so I'm wondering if this could be model-specific, even though I can't imagine why? Clearly a longer running print runs the motors for longer, so could this be an indication of motor failure, or overheating? It's almost as if Z movements are overshooting at layer where we see the beginning of delamination (layer 10). The initial red images above are with a layer height of 0.29999 just incase S3D was slicing wierdly. But here's a previous print of just two copies which went wrong on a lower layer: And here's the point when things first went wrong where, after printing one item successfully I tried to print a whole bed: The successful print at the top, by the way, was printed after the failures at the bottom. So I'm scratching my head wondering what's happened, or what's failed, what I can do to fix it, and what I can learn from this. Ideas anyone?