Something failed, now prints are far too thin

[King_Alistair]

I suspect that this is slic3r's fault; I just wish I could tell you how to fix it. My printer was able to put out the pre-loaded sample Gcode without any trouble, but as soon as I generated my own with Slic3r my prints came out just like that. As soon as I switched to S3D everything started coming out perfectly. That's not a sales plug, mind you; I'm sure you can get slic3r to serve you just fine.

I'm recognizing a lot of similar issues in your video. For example, the nozzle isn't mashing each layer down onto the previous one; it's depositing the layers from too high, so you're getting an object that looks like it was spun out of filament instead of one that looks like it was carefully formed out of flat layers of material. If you can't find any mechanical issues(though those "shards of PLA sound concerning as well), perhaps you could try running some pre-generated Gcode that was designed for your particular RigidBot? That way you could either pinpoint or eliminate Slic3r as the cause of your problem.

[rco3]

Definitely check to make sure your bore is clean. I had intermittent feed problems that degraded over time, but miraculously recovered after a brief pause in printing. Turned out to be a piece of metallic debris floating in the melt zone, never blocked it but increased back pressure until the hobbed bolt started chewing the filament. Once the filament started getting chewed in one place, it would snowball quickly and the hobbed bolt quickly lost its ability to grip and extrude the filament. Removal of the debris definitively ended that issue.

[GiGi]

I am having the same problem, but it seems to be getting worse. The extruded filament is stringy and fails to attach to the plate despite having leveled the plate. The attachment might be connected to the fan, but I dont know what to do with the extruder.