Prints failing in the same place.

[nU.metA]

Thank you guys for helping us resolve our problems with artifacts. We turned on the fan, changed the speeds and temps. and now everything we print is basically artifact free. We do however, have a new problem. On larger prints that have much longer print times, we are noticing that our printer seems to be colliding with the object in certain areas, and eventually knocking it over onto the bed. It appears to us, that this is typically happening at nearly the same place within the print (it very well could be). We've tried printing pieces taller than the ones picture below with success, so we're relatively positive that it's not a clearance issue/weird height thing. Our settings are as follows:

filament: ABS

extr. temp: 228 C
bed temp: 80 C (then we drop it down to 60 C)

speeds:

infill: 30 mm/s
perimeter: 33 mm/s

We tried printing the first layer at varying speeds, both faster and slower, and that didn't seem to make too much of a difference

Is it possible that the gcode file itself is to blame, since these errors are in the same area? Or is it possibly something more mechanical? We're currently using ABS juice as our adherent, should we try something else (seems like we've had the best luck with this so far)? The piece (attached below) is rather large. Would printing in PLA make a difference? Any input is appreciated. The community has been of great help so far!

sword base

sword tip

top view

[3D-Print]

There are a number of things that can cause this. This happened to me and I had even worse effects. Not sure this is your problem since you do print much longer and I would suspect that if it was a loose belt you would see it earlier in the print. Hope this helps.

(http://forum.seemecnc.com/viewtopic.php?f=77&t=7992)