Started printing this filament shrinkage test and had to leave the house. When I came back, the whole upper half of the part had shifted after the first few layers, and it left two solid blobs attached and one ball of spaghetti. The magnetic bed doesn’t appear to have moved. Part is still solidly adhered to the print bed. How did this happen, and how can I keep it from happening again?
Weird possibility! I once tried to lubricate my machine and put a drip or two on the threaded Z axis rod. BAD IDEA.
This lead to VERY minor slippage once the gantry hit a certain height, and it would do exactly this. Lots of loud collision, very scary.
…So make sure your Z rod isn’t slipping, or slippery?