[Top Layer/Perimeter Underextrusion]

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.

[Top Layer/Perimeter Underextrusion]

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

[UM2 Feeder Motor runs in reverse]

Just wanted to add that I flashed Tinker Gnome and wow am I impressed. It took some fiddling around but I was able to get the material to stick to the plate (by using glue as suggested) and fixed extrusion problems after a few test runs for layer 1 only. It's crazy how a tiny little twist of the bed screws can overdo it or make it perfect. Y'all have been an awesome help (Much more so than Makerbot, also after seeing this beauty perform I'll make sure my university never buys another Makerbot, granted 4th gen and prior or fine imo)

 

However, last Friday I completely reassembled the printer as per phone support suggested. I was left with one part, can anyone enlighten me on what it's to? It seems too small for everything in here.

 

[UM2 Feeder Motor runs in reverse]

No, I didn't assemble it backwards. The printer says UM2 so I flashed UM2. Turns out it is a 2+ because it was upgraded but the previous owner didn't apply the new stickers. I was told by live chat the newest version of cura "remembers" what firmware you flashed, so it was actually flashing UM2 firmware every time even when selecting um2+. Deleting the cura folder in %appdata% and selecting UM2+ firmware fixed my problem.

[UM2 Feeder Motor runs in reverse]

To clarify, it DID work until I disassembled the feeder assembly to clean it (because the tube and the feeder motor gears/thread were just caked in it. I didn't completely take apart the extruder, I only undid the thumb screws so I could disconnect the tube for cleaning.. I am pretty sure I put everything back together correctly. The tension spring and clamping lever are in the correct spots and orientation.. But again, with all that taken off just staring at the base gear, it spins counter clockwise when trying to feed (which actually is unloading!) but clockwise when unloading (which is actually feeding!) But I spent 3 hours trying to fix this yesterday and I am really upset because the other 3 printers we have are makerbot 5th gen and are all horrible.

[UM2 Feeder Motor runs in reverse]

I have a UM2 (I think. The printer says its a UM2 but the feeder motor casing is white, not the black).

It worked fine until I updated the firmware in Cura, now when trying to feed it unwinds, and when trying to unwind it feeds.

I have tried flashing firmware for every UM2 model to see if I had the wrong one. Still nothing. I even tried https://github.com/Ultimaker/Ultimaker2Marlin

and STILL nothing worked. What can I do to fix this?