Wriggly walls

[muhkoch 2]

Hi again. 

 

I'd be very pleased, if you can help me once more. 

Two-three weeks ago my printer startet out of nothing to print the walls quite wriggly (see Image "1").

My Ultimaker 2 has the newest Thinker firmware (V19.03.1) installed.

I've printed PLA with 210° / 60° at standard speed. 

 

 

Nicolinux had in 2016 a similar Problem, described in the flowing threat:

Because of this, I also tried to switch of the build plate heating. 

When I switched if off, everything was great (see Image "2"):

 

But without the build plate heating it looses the adhesion. So I tried the PID auto config with 5 iterations. Which gave the following result (see Image "3"):

 

All the previous prints were printed with 0.2 mm Layer hight.

I then accidentally tried to print one with 0.1 mm Layer hight. Which resulted in a print without any wriggles, even though the print bead heating was activated.  (see Image "4"): 

 

How is this possible? I'm getting wriggy walls when I print with 0.2 mm Layer hight. But with 0.1 mm Layer hight everything is OK. Or when I print with 0.2 mm Layer hight but stop the printing bed heating, also every thing is all right. But the adhesion is very bad. So I need this combination of 0.2 mm Layer hight and printing bed heating. 

 

Thanks for your advice.

[muhkoch 2]

So I finally figured it out. 

I tried the flowing: 

• Setting 8/16 Jumer
  • Not influence
• Loosening the long screws of the printing head
  • improves the print but it has still wriggles
• Greasing the z-axis
  • no improvement
• Changing heat bed temperature
  • no improvement
• Changing extruder temperature
  • improves the print but it has still wriggles
• Switching of the fan
  • no improvement
• Auto adjust the PID of the bed and the extruder
  • Even worse wriggles
• Tring different PID settings
  • The wriggle pattern changed, but no actual improvement

After many try and error cycles I finally came to step 26... 

 

The solution was: 

• Exchanging the temperature sensor, Olsson Block, Noozle and this White thermal piece. 
• So test 26 was successful:
• 

Of all four replaced parts, I think it's just because of the PT100 temperature sensor. As I intended to replace the temperature sensor, it wasn't possible to get it out of the Olsson Block. Therefore I replaced all these different parts.