Vertical lines in printed parts...

itek09

@phaedrux I tried with default accelerations for ender 3 with the same problem (X500 Y500). Also I checked the belts tension...

With default motherboard I was using X1500 Y1500 with really goods results.

@timothyz I will try it this afternoon, thank you. I remember that I start my setup with I40, same result after all but I need to check again xD

I will try also to use the stock extruder this afternoon...

dc42

It looks to me like ringing with little or no damping, because of the way that the lines are parallel to the arms of the Y. There are two things you can do:

Try to reduce the amount of ringing, or at least increase its frequency. Check that the belts are taut. Check that the XY motor currents you set with M906 are between 60% and 85% of the rated current of the motors. On the Duet WiFi the motor currents you set are rounded down to a multiple of 100mA.
Measure the frequency of the ringing and use dynamic acceleration adjustment to try to cancel it. See https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M593_Configure_Dynamic_Acceleration_Adjustment.

denke

For me it seems to be two different problem at the same time:

Ringing for sure
on the left cube the ringing seems to be superimposed with purely vertical lines which are equal distance, which does not seem to fade away as we get further from the last corner.

The first one might be a loose belt (too elastic belt?), insufficent rigidity of the printer frame, too much acceleration and or jerk, too heavy print head (or any combination of these)

The second one might be some resonance, faulty motor or belt idler, etc.

itek09

@dc42 Thanks a lot, I will try to proceed with your message.

To add more info, I'm using these motors in XY: https://e3d-online.com/motors-high-torque-motor

As far as I know, I need to set M906 to X1300 Y1300 (77% of rated current, it is correct??). If it's correct, I usually work with 1250mA (-> 1200), but it's the same situation with 800mA

I tried the M593 F40 because I measured it at this frequency (but I need to check it properly).

@denke the belts are the stock belts from ender3. The frame is Ender 3 frame. My print head is not so heavy (bowden), I work specifically in this way.

I tried with stock acceleration and stock jerk with same issues :<

itek09

I tried today some things without goods results...

Belts are with correct tension, changed to stock extruder, tested with really low acceleration (lower ringing but same vertical lines).

I see those threads that maybe can help to check some things:

https://forum.duet3d.com/topic/11192/reduced-quality-prints-from-marlin-to-duet-2-wifi/11
https://forum.duet3d.com/topic/11258/continuous-vertical-lines-on-shell/41

I designed another fan layer conduct to remove some detected vibrations with the actual one (will add weight to X but I think it's better than actual vibrations).

I will keep you updated tomorrow

Thank you and good night

itek09

Ok, I have another question (not so much related).

I tunned the Hotend and bed PID and now the duet make a little noise (and constantly turn on and off a red led) related to bed heating, Is it normal and safe?

The temperatures are now a lot of stable, but I don't know if it's safe :<

Edit: The sound is not from duet, is from my PSU... can it survive? xD

bot

What firmware does the ender 3 run stock? If it’s marlin, the default jerk values will not be equal on both systems. Reprapfirmware implements jerk in a different way. Marlin (iirc) uses half the stated jerk value for sharp abrupt direction changes.

If the marlin defaults had a jerk of 10 mm/s, you will get closer to the same behaviour by setting m566 to 5 mm/s (300 mm/min).

This may not be the entirety of your problem, tho.

itek09

The stock is Marlin.

I've looking old printed parts and I see that the vertical lines are from the start of the times, so I see the lines recently (maybe due new printing speeds) but are not new in my printer (do not start with Duet).

I bought new 16t pulleys and idlers for X and Y and maybe I need to change from V wheels to linear guides to completly avoid the vertical lines... or maybe print slowly is enough xD

I solved the problem with the bed heater (commented in my last message), due a parameter in the configuration.

Thank you for your help to all of you, I will keep pushing and fighting!

dc42

@itek09 said in Vertical lines in printed parts...:

Ok, I have another question (not so much related).

I tunned the Hotend and bed PID and now the duet make a little noise (and constantly turn on and off a red led) related to bed heating, Is it normal and safe?

The temperatures are now a lot of stable, but I don't know if it's safe :<

Edit: The sound is not from duet, is from my PSU... can it survive? xD

The sound is the PWM to the bed heater. It shouldn't harm your PSU, but you can increase it to 200Hz if it worries you. Locate the M307 H0 command (it will be in config-override.g if you saved the heater tuning using M500, or in config.g if you edited it manually) and add F200 to it.

Veti

@itek09 said in Vertical lines in printed parts...:

I bought new 16t pulleys and idlers for X and Y

are the idlers toothed? the original idlers on the ender 3 are large so non tooth is ok.
but if you went with 16t pulley you might have gone with smaller idlers.