Terrible first layer bed adhesion with prusa original PLA
 
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Sylvia Moss
(@sylvia-moss)
Member
Terrible first layer bed adhesion with prusa original PLA

Hello, I need help with my Prusa MINI+ bed adhesion, especially with the Prusa original PLA. 

My printer is 2 years old and it printed perfectly in the beginning. For about one year, the bed adhesion became terrible and it seems to be getting worse. It is even worse when I am using one of my Prusa original PLAs and it seems to work better with PolyTerra PLA, which is a thicker PLA and has more adhesion itself.

I tried everything...

  • Z calibration
  • Washing the bed with dish soap and warm water
  • Isopropyl
  • Low print speed on the first layer
  • Higher bed temperature 
  • Higher nozzle temperature 
  • Tighten/lose idler screw
  • A complete printer maintenance as per manual
  • Use brim

When printing the first layer it seems that the filament goes up or doesn't even get extruded. Here is a video of how the printer behaves with a Prusa PLA.

The printer behaves the same with the gcodes provided by Prusa, which makes me believe it is not related to slicing.

Nothing works. My last resource, which I have not done yet, is the cold pull. Before trying that want to hear from others their opinions and tips.

I appreciate any help! 

 

Posted : 18/12/2023 12:49 pm
Sylvia Moss
(@sylvia-moss)
Member
Topic starter answered:
RE:

I can't seem to post the video 🤔 

This post was modified 4 months ago by Sylvia Moss
Posted : 18/12/2023 12:56 pm
Thejiral
(@thejiral)
Noble Member
RE:

Is the build plate still the original 2 years old one? They do degrade over time and at some point reviving by roughening it up can help recovering some of the adhesion. I am not an expert on that so don't want to give advise in this regard. 

Build plates are consumables, if also recovery of the plate with harsher methods fails you can either buy a new build plate or, like me, simply use adhesives like Magigoo or dimafix. They secure perfect adhesion even on old or not perfectly pristine plates. 

This post was modified 4 months ago by Thejiral

Mk3s MMU2s, Voron 0.1, Voron 2.4

Posted : 18/12/2023 1:25 pm
Thejiral
(@thejiral)
Noble Member
RE: Terrible first layer bed adhesion with prusa original PLA

That is, if your problem is really bed adhesion. If you do not even get anything extruded, you have either a way off Z-offset or some other serious issue (clogged nozzle for example). 

There is nothing wrong with doing a cold pull though. If you have never done one so far it would be a good idea anyway. And if you haven't changed the nozzle ever, maybe changing the nozzle for a new one could make sense. Brazz nozzles degrade over time even when not pinrting abrasive materials. If you change the nozzle you should do a cold pull before as well. 

Mk3s MMU2s, Voron 0.1, Voron 2.4

Posted : 18/12/2023 1:30 pm
Sylvia Moss
(@sylvia-moss)
Member
Topic starter answered:
RE: Terrible first layer bed adhesion with prusa original PLA

Thanks for the reply! 

I did a cold pull once and checked if the nozzle was clogged this time by opening and looking inside the heatbreak. 

The last thing I tried after your comment, was to push the heaterblock, as I think mine is too far away and can be closer. Unfortunately, one of the tiny screws came stripped and I can't get it out. I have tried everything even the appropriate tool to remove stripped screws.  

Posted : 22/12/2023 4:35 pm
mark
 mark
(@mark-3)
Reputable Member
RE:
Posted by: @sylvia-moss

Thanks for the reply! 

I did a cold pull once and checked if the nozzle was clogged this time by opening and looking inside the heatbreak. 

The last thing I tried after your comment, was to push the heaterblock, as I think mine is too far away and can be closer. Unfortunately, one of the tiny screws came stripped and I can't get it out. I have tried everything even the appropriate tool to remove stripped screws.  

A tapered T6 Torx tool like you get in phone tool kits worked for me:

https://forum.prusa3d.com/forum/hardware-firmware-and-software-help/screw-stuck/#post-515092

Regards,

Mark

This post was modified 4 months ago by mark
Posted : 23/12/2023 2:16 am
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