[Sudden Under Extrusion]

I tried going hotter and slower print speeds but I'm still having print failures. I might try lowering the layer height and printing slower than 7mm^3/sec.

I would assume it's the models themselves but I used Netfabb to repair all of the shapes. Plus one is just a basic cylinder and not that complicated.

[Sudden Under Extrusion]

8mm^3/sec is basically the max speed for .4mm nozzle.  You will get occasional problems going right at the limit like that.  And that's for 230C.  For lower temps like say 210C you are even more likely to have problems.  Typically it just barely works for 30 minutes and then it finally grinds the filament too much and starts slipping too much and you get a failure (ground down filament) at the feeder.  Typically.  It's very hard to say if this happened to you but 90% chance that is what happened.

So try printing hotter and/or slower.  Try maybe 230C or 240C or if you care more about the quality cut the layer height or print speed in half.  Maybe this never happened before  because it's a filament that needs a little more heat.

 

Thanks for the feedback. I'm going to try to print it at about 7mm^3/sec. The other guide I read said 10 was the max but i'll try the slower speed and see how it turns out.

I'm printing with PLA so the max temp recommend is 210. What temp would you recommend?

[Sudden Under Extrusion]

I'm having a problem where my prints suddenly start experiencing under extrusion even though the print has been perfectly fine for multiple layers before. Additionally I see that the filament is grinding out in the back of the extruder.

I checked my printer settings based on this guide and they are withing the acceptable limits of 8mm3/s.

Also here is an example of my retraction settings as well.

I'm experiencing this on both an Ultimaker 2+ and Ultimaker 2 Extended. I dont believe there are any problems with the model as it is nothing radically complicated or lots of over hangs.

I'm printing with PLA filament from Hatchbox. I've printed numerous other things before and have not experienced these problems before.