"Oscillating vibration" & Then THIS

[Flightrider]

Hey Guys,

After probably 20 or so prints, I've encountered a problem I haven't seen before.

Last night I was printing a round cylinder similar to shown below. After a seemingly uneventful start, I was in the other room and heard my Rostock Max v2 with an unusual sound, sort like it was rapidly moving back and forth, small movements, but rapidly -- similar to when in-filling. At first, I didn't think too much of it and was busy, so I let it run a few minutes before checking on it... only to find it had gotten perhaps 1/3 of the way through the print, then was a tangle mess of string fiber. I tossed it up to an anomaly and re-printed it this morning. A couple of small changes in the design, and it went fine.

Then, this afternoon, I attempted the attached print for a prototype tension puller I'm working on. Ten minutes or so after it started, I once again noticed the sound of rapid, oscillating movements and walked over to find the picture below upon cancelling the print.

I have not idea what is causing this, since I've never seen the printer do this before. The print was going along fine for the first 10 minutes. There's nothing unusual I can see in the Layer views. The print seems to just suddenly go into a seizure!

Any hints would be appreciated.

Dave

[Johncoffee]

Try printing via the SD Card. Maybe it helps.

I have no idea what can cause this..

[Polygonhell]

It's hard to tell from the description but.
If the sound is more like jittering and one of the motors is just vibrating backwards and forwards when this happens, the odds are you have a loose connection somewhere on one of the motors.

[Glacian22]

Aside from this particular issue, it looks like you're also overextruding, though it's hard to tell from the angle of the picture.