Top Layer/Perimeter Underextrusion

[mirGantrophy 1]

Factory File: https://drive.google.com/file/d/1Rqu8jwuTrEMkgxxIzwpGQ24KbCo3pdC-/view?usp=sharing

G-Code: https://drive.google.com/file/d/1NVilEw1ACfKB-2LAGd5i8q9id3Eua7Os/view?usp=sharing

Bottom layers and infill print fine. Only issue is the top layer(s) and walls.

I've legit completely tore apart the UM2+ and rebuilt it because it was in very bad shape at the time.

After MANY calibration prints and babystep adjustments I figured it was time to tighten the long and short belts because nothing helped.

The cubes are arranged as oldest on the left, newest on the right. The newest cubes measure ~19.8x~19.7x~20.02

The longer calibration piece came out ~100.2x~99.89x~50. The only thing left to fix is this under extrusion. What can I do to correct this?

I have followed this guide: https://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide

My prints were significantly worse before doing this. Not only were my axis rods misaligned, so was the extruder. Unfortunately it's not perfect yet.

Build plate is level.

Short belts are both tight & have nearly the same tension.

Long belts are tight enough that they vibrate like a guitar string and you can't *easily* force them to touch the belt above/below it

https://www.thingiverse.com/thing:195604

https://www.thingiverse.com/thing:1278865

 

(underside view) The 3 cubes on the right are the newest. Bottom layers seem to infill correctly.

 

my axis steps/mm are: X = 80.21, Y = 80.29, Z = 200, E = 369 (Tinker Firmware)

 

I printed most of these at ~30 mm/s with a 70 degree bed and 190 degree extruder temp (PLA) with the first layer printing at about 5 mm/s

 

 

 

 

I don't know if under extrusion is the problem though. I followed this guide https://mattshub.com/2017/04/19/extruder-calibration/

my filament is 2.87 in s3d and my extrusion width is .48mm.. it printed .48mm thick.

Extrusion multiplier of 1.00.

 

 

Here are some more printer woes. This took 8 hours and yet it's not acceptable.

 

Here are some videos of it printing, it doesn't start to mess up until after the first layer!

 

https://drive.google.com/open?id=1a9k6IDWHJPnn_woi83n0Sekac0ppBE8l

https://drive.google.com/open?id=1tL-LXsYs9pjOzOCy22wGIrTcXgPUk7io

 

This is also 100% infill (rectilinear).. Mind you the first 2-3 layers come out fine and then its downhill and gradually gets worse the longer the print goes

Edited July 13, 2018 by mirGantrophy

[mirGantrophy 1]

I dare say I fixed the problem. Changed the temperature from layer 2 onward to 220 with a first layer of 190.

Will report back after printing another base.