print quality

Denis

Sorry, of course 256, but 16 is the same trouble

themelle

M92 X160.00 Y160.00 Z1600.00 E449.00 // steps

Have you tried lowering your E steps?

E3D is recommending to start with 837 step/mm for the extruder when using their 0.9deg Aero stepper.
As you are using a 1.8deg stepper, your E steps should be around half of the E3D recommendation.
Doing the math yields 418.50 - your configured 449.00 steps/mm are significantly higher.

droftarts

I get an error message if I send:

M350 E255 I0
Error: M350: Drive E3 does not support 255x microstepping

Not sure what the microstepping will be defaulting to. Make sure it's:
M350 E256 I0

Given the stringing and inconsistent layers, are the thermistor settings correct?
M305 P1 T100000 B4619 C9.390164e-8 R4700 // termistor

B4619 seems high, as does the C value. What thermistor is it? What are your thermistor settings in Marlin? Incorrect temperature reading would produce poor retraction.

Ian

Denis

@themelle I do not use the original e3d, so I calibrated the extruder manually. It has excellent repeatability of results. I also set up the M592, but did not notice any big difference. Again, I note that on other firmware I do not have such problems. 0.9 tried the motor, the results are the same

Denis

@droftarts I agree, these are my experiments, because I’m always searching. However, how can I explain that with PT100 I do not improve the quality at all?

droftarts

@denis I guess you're using a Duet Wifi. What version, and what firmware version? Probably best to concentrate on thermistor settings, as there's clearly a difference between Marlin and RRF, as that's where the inconsistency is. Would be good to know what thermistor you have.

Ian

Denis

@droftarts not to be unfounded, I changed the steps to 418 and M305 P1 T100000 B4267 C0 R4700 according to the data for the thermistor 104-NT4R025H42G. Re-calibrated the PID and overloaded the board .Launched printing and expect results

Denis

@droftarts Yes you are right. Duet Wifi and 2.04RC1 (yesterday there was still 2.03, but with the same result)

bartolomeus

@denis have you set the slicer to relative extrusion and reprap firmware?

Denis

@bartolomeus currently using Cura 4.2.1, reprap g-code variant and relative extrusion

Denis

@droftarts here is the result with the new settings. nothing of changed

Veti

@denis said in print quality:

I do not use the original e3d

are you sure that you have a semitec thermistors?
nearly all clones dont use semitec thermistors.

bot

Damn, this is a tough one!

I had similar uneven extrusion lately, and it was because my extrusion temps were way higher than my other printer given the same set point. I dialed my temp for pla from 205 down to 190 and my prints became crisper.

I know you have tried the thermistor settings and all sorts of things, but try printing as low temp as possible while not grinding the filament.

That’s the only thing I can think of at the moment.

Denis

@veti I don’t know if it’s possible to publish product links, but moderators will forgive me (probably) https://s.click.aliexpress.com/e/bVR3ictU

Denis

Does anyone think his printer prints perfectly? I can give this model. But only print is interested in the Cura. This is related to other models and how it builds support. S3d sometimes forgets to put them correctly, and other slicers are unstable for me

themelle

Just a guess into the blue: what does the file /sys/config-override.g on the Duet SD card contain?

grizewald

@denis I wouldn't say my printer prints perfectly, but it's similar to yours (it's a big CoreXY) and I have some nice white PLA and use the latest Cura as my slicer. My printer is controlled by a Duet 2 WiFi running version 2.03 firmware.

I use a genuine E3D V6 with a genuine Bondtech BMG extruder. (I won't buy cloned stuff as I believe my money is better spent rewarding people who innovate instead of those who produce poor quality copies.)

By all means PM me one of your troublesome models and I'll set it printing and see what happens!

I also find your problems puzzling and it would be very interesting to see why you can't get the Duet to print properly.

timothyz

@denis Those thermistors used to be 3950 Hisense thermistors (on the same link) and they changed them a couple months ago to the semitec.

I would look at your purchase history and look at the archived page info. I had the same issue (was running a 3950 at the semitec value) and my temperature was WAY high ( I think 30-40 deg)

Try setting to 3950 and see if you can still extrude PLA at typical temps.

My 2cents

Denis

@grizewald 0 filling, 3 layers wall https://yadi.sk/d/gE_Wl-tWN37QHA

Denis

@timothyz I just printed this in s3d. All walls are good, but either at the beginning of the layer, or at the end there are strange artifacts. (Well, yes, I also replaced the screws with sfu1204, because I finally managed to replace the balls)) Therefore, the walls look good