Terrible print

apex2011

@CaiJonas I have done auto pid tuning but will try it again

jens55

Extrusion multiplier should be around 1.0
from config.g:
I am not familiar with an ender 3 but the following thoughts are based on a Creality CR10
M92 should have an E value of around 100 unless you have a reduction gear extruder in which case it should be around 400.
Motor current seems a bit low but should work.
Edit:
I suspect that you re way too high on your steps per mm and the extruder is grinding your filament like there is no tomorrow. Every once in a while it catches and moves the filament forward a bit.

droftarts

@jens55 said in Terrible print:

I suspect that you re way too high on your steps per mm and the extruder

He's got x128 microstepping set for E, so 769 / 8 and you get 96. Also mentioned here: https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+2:+Configuration/38#s128

@apex2011 The way your print looks thinner as it goes up just makes me think the Z is moving too far. Can you shut me up by moving Z to 0, then move it up 10mm, and measuring how far it has moved up?!

Ian

apex2011

@droftarts please correct me if I misunderstood but I homed my Z axis and then moved up 10mm. I measured approx 9.98mm from Z home location
.

droftarts

@apex2011 said in Terrible print:

@droftarts please correct me if I misunderstood but I homed my Z axis and then moved up 10mm. I measured approx 9.98mm from Z home location
.

Thanks for checking! That seems correct. Would seem to be extrusion related, then.

Ian

Phaedrux

How fast are you trying to print that cube?
Tangled filament path?
Clogged nozzle?
Loose pinch idler on the extruder?

Those would be my guesses.

apex2011

@Phaedrux here are the print speeds

Phaedrux

So definitely not too fast.

If you tell the hotend to extrude into free air, does it come out smoothly?

apex2011

@Phaedrux yes, it looks like it comes out nice and smooth, no skipping on the gear either.

I had a VERY small step in the right direction by going through the entire setup process again. The print is still terrible....just a little less terrible lol

droftarts

@apex2011 Can you post the gcode file you're trying to print?

Ian

Phaedrux

Do you happen to have the slicer configured to expect 3mm filament? This sometimes happens with Cura defaulting to 2.85mm filament after an update when you're actually using 1.75mm filament leading to huge under extrusion similar to what you're seeing.

Your screen shot of the speed settings looks like... Simplify3D? What filament diameter do you have configured?

Also, what nozzle size are you using and what size is configured in the slicer? Using a larger nozzle than you think could lead to under extrusion like that as well.

apex2011

@droftarts sure, here is the gcode from the last print. I slowed it down a lot just to rule out print speed.

[0_1583623423559_800 Test_Cube.gcode](Uploading 100%)

apex2011

@Phaedrux I am using Simplify 3d. I confirmed that it is set to 1.75mm filament. the nozzle is 0.4mm. just before my last print I cleaned out the block and changed the nozzle to a fresh, new one.

Phaedrux

And you've gone through the extruder calibration from that Ender 3 guide?

apex2011

@Phaedrux I have but I can do it again.

Phaedrux

Can you post a picture of the printer overall and the extruder in particular? Maybe a video of it printing?

Have you tried a different slicer? Might not be a bad idea to try cura or prusa slicer. They have profiles for the Ender 3 and it would be good to see if it's a mechanical issue or a slicer issue.

deckingman

@apex2011 My best guess for what it's worth is that you have terrible under extrusion. I haven't read every post in this thread but it seems that your settings aren't far off. The fact that a manual extrude into air looks OK would rule out any blockage. Which only leaves one thing that I can think of and that is a wiring fault that is making and breaking connection as the hot end moves around. A bad crimp could do that. Try checking by doing a long manual extrude - say 100 mm and wiggle the extruder motor wires while that's happening.

droftarts

@apex2011 said in Terrible print:

@droftarts sure, here is the gcode from the last print. I slowed it down a lot just to rule out print speed.

[0_1583623423559_800 Test_Cube.gcode](Uploading 100%)

Upload didn't work. Try hosting it somewhere else and post a link?

Ian

oliof

my money is on the bowden gap issue with the terrible pneumatic push fits on an ender, and that the switch to the board is incidental. See https://www.youtube.com/watch?v=30qqKUwviww

apex2011

@droftarts Here is a link to google drive

https://drive.google.com/open?id=1P7hhHLL-JGG3pNmTfgjfTZtHWjeIu3XH