Okay, I had the exact same printer and I likely know exactly what’s going on because I also had adhesion issues in the beginning.
First off, if you have a textured plate, you should not need glue. Clean that plate thoroughly with soap and water and allow it to dry on a heated bed for a little while. You can also chase the water with alcohol to get it to dry quicker, but still let it get a good dry time.
Next, go into the printer and have it do a full recalibration for bed leveling and z offset height. Once it is done, go back into the printer and manually lower the z offset. The automatic z offset gets pretty close, but not quite good enough. For my printer I found that lowering it by -0.07 mm was a great starting point. Anytime you auto level or recalibrate the bed it will reset this number, and honestly you don’t need to do it very often unless you perform maintenance or tighten something. My theory is that the automatic z offset height is sensing the very top of the texture of the bed, and is not taking the texture itself into consideration. You need to lower the nozzle on the z offset to get it to squish the plastic down into the texture of the bed.
It should only print one layer high. Check the quality of the print afterwards and pay close attention to the amount of squish and overlap of the plastic. The perfect amount of z offset should be completely smooth without any gaps. For my printer I tended to go a little bit lower just to get a little extra squish and bed adhesion, which showed some slight, raised ridges between the nozzle passes. This will smooth out by the second or third layer.
After all of this, consider raising your bed temperature to 60C for PLA. I found creality’s default bed temp of 55 to be a little too conservative.
Lastly, if you are trying to print at 0.1 mm layer height, you need to override your first layer thickness to be 0.2 mm. Also, don’t print anything tall with that layer height. I think there is some sort of error buildup that would cause my printer to knock things off of the bed after 145 mm.
It’s a good printer but you definitely still have to tweak things like a typical printer. Overall, it was that z offset that was the culprit for a lot of my adhesion issues in the beginning. Anything after that just helps.
Edit: After looking it again at the picture, you can clearly see the gaps between the nozzle passes in your first layer. I am very confident that your z offset is too high. The plastic is lifting up a little bit and then when your printer heading for the second layer, it’s colliding with the plastic and ripping things up.
Dettweiler42@lemmy.dbzer0.com 2 weeks ago
Okay, I had the exact same printer and I likely know exactly what’s going on because I also had adhesion issues in the beginning.
First off, if you have a textured plate, you should not need glue. Clean that plate thoroughly with soap and water and allow it to dry on a heated bed for a little while. You can also chase the water with alcohol to get it to dry quicker, but still let it get a good dry time.
Next, go into the printer and have it do a full recalibration for bed leveling and z offset height. Once it is done, go back into the printer and manually lower the z offset. The automatic z offset gets pretty close, but not quite good enough. For my printer I found that lowering it by -0.07 mm was a great starting point. Anytime you auto level or recalibrate the bed it will reset this number, and honestly you don’t need to do it very often unless you perform maintenance or tighten something. My theory is that the automatic z offset height is sensing the very top of the texture of the bed, and is not taking the texture itself into consideration. You need to lower the nozzle on the z offset to get it to squish the plastic down into the texture of the bed.
After you make an adjustment, scale this print down to be 100 mm x 100 mm x 0.1 mm.
www.thingiverse.com/thing:6130105
It should only print one layer high. Check the quality of the print afterwards and pay close attention to the amount of squish and overlap of the plastic. The perfect amount of z offset should be completely smooth without any gaps. For my printer I tended to go a little bit lower just to get a little extra squish and bed adhesion, which showed some slight, raised ridges between the nozzle passes. This will smooth out by the second or third layer.
After all of this, consider raising your bed temperature to 60C for PLA. I found creality’s default bed temp of 55 to be a little too conservative.
Lastly, if you are trying to print at 0.1 mm layer height, you need to override your first layer thickness to be 0.2 mm. Also, don’t print anything tall with that layer height. I think there is some sort of error buildup that would cause my printer to knock things off of the bed after 145 mm.
It’s a good printer but you definitely still have to tweak things like a typical printer. Overall, it was that z offset that was the culprit for a lot of my adhesion issues in the beginning. Anything after that just helps.
Edit: After looking it again at the picture, you can clearly see the gaps between the nozzle passes in your first layer. I am very confident that your z offset is too high. The plastic is lifting up a little bit and then when your printer heading for the second layer, it’s colliding with the plastic and ripping things up.
antaymonkey@lemmy.world 2 weeks ago
Thank you! This is fantastically helpful!