FIlament jam/grind at height.

[midnitmike]

Good morning... So im working with a client and every time i get to a certain (+ or - an inch) on this part it fails. It stops extruding, jams and grinds on the filament.
I dont know if it stops feeding because it buckled or if buckled because it stopped feeding.
here is a pic of the filament


Ive tried to loosen the extruder screws to put less pressure on the filament. ive also tried to tighten it to put more pressure on it.
its failed 3 times... these prints are 25 hours each... it fails about 15-18 hours each time.

.2mm layers
75mm/s
215c temps (at high speeds i need the temps up there, and the bond is good and strong)


Would love to get a discussion going on why this is happening and how to perhaps remedy it.
thanks

I'd like to see a picture of the part you're printing, especially around the area where the filament jammed and at the bed directly below. My reasoning is that your jam might be caused by the part warping up off the bed causing the slight gap between the extruder and part to close up. I've had this happen innumerable times on large prints and the only cure I've found is to ensure that my part stays perfectly bonded to the bed. Tell tale signs of this happening would be any movement of the part (warpage) , as well as grooves in the upper layers caused by the extruder dragging through the plastic.

As far as remedies go it depends on the part. In some cases I've had success simply by using more hairspray for better adhesion, or raising the bed temp to compensate for the heat loss due to the increased surface area. Recently I've gone to larger and larger brim settings to help hold my parts in place, or even adding more layers to the brim to make them stronger. As always a perfectly calibrated machine and a clean nozzle are required before setting up a large print job.

Mike