What causes the rest of the print to separate from the first layer?
I came back to my printer yesterday to find that the first layer(s?) had separated from the rest of the print:
I printed 4 separate parts and this issue affected all of them. I'm not sure why this happened but it seems like the rest of the print worked as usual.
I recently enabled the option to print external perimeters first within PrusaSlicer, but I'm doubtful this is causing the issue as I've had this layer separation problem before (I thought it was just a one-off).
Presumably, it is simply an issue with first layer adhesion, which has come out of place when the next layer is printed, but it just seems odd to me that this occurred to all four parts, despite not being connected, and the X offset between the layers looks the same for each part.
My initial thought is to raise the temperature of the bed for the first layer by 10º to promote adhesion (currently printing at 60º for all layers, and the material is PLA), but I thought I'd ask here for advice first (please!) before wasting any more filament 😥
Best Answer by _KaszpiR_:
I had the same issue, the problem is that you print very large flat surface.
When that surface cools down then the central area of the printed part warps upwards, which is causing nozzle to hit it.
If your adhesion is good then nozzle actually gets stuck in the printed part and literally shifts the whole print bed until an part gets skewed that the nozzle is released.
What helps:
- ensure there are no major temperature changes around the printer - have it in at least 22C room without drafts, or use enclosure (even basic one from the transport packaging helps :D)
- print big parts separately
- increase bed temperature
- adjust cooling in PrusaSlicer
RE: What causes the rest of the print to separate from the first layer?
A common problem where the nozzle hits something on the print and the layers shift. If the prints tear off the mat, you have the well-known "Spaghetti monster".
RE: What causes the rest of the print to separate from the first layer?
Thank you for the reply! That's odd as I have nozzle wipe on and I'm not using any support material for these prints that may potentially fail and obstruct the nozzle -
Are there any other steps I can take to prevent this issue?
RE: What causes the rest of the print to separate from the first layer?
This is not a clogged nozzle problem. Rather, a problem with the cleanliness of the nozzle, when a blob can fall from it and the nozzle hits it, or some problem with the filling and print speed. This needs to be tested and rather such large prints should be realized one at a time, so that in the event of a malfunction the other prints will not carry it. The consumption of time increases a little, but it does not cost as much as a destroyed filament.
RE: What causes the rest of the print to separate from the first layer?
This is not a clogged nozzle problem. Rather, a problem with the cleanliness of the nozzle, when a blob can fall from it and the nozzle hits it, or some problem with the filling and print speed. This needs to be tested and rather such large prints should be realized one at a time, so that in the event of a malfunction the other prints will not carry it. The consumption of time increases a little, but it does not cost as much as a destroyed filament.
Thanks so much, I've investigated the nozzle and it doesn't seem to have any issues, so I'll do some experimenting with slowing down print speed and observe the print to spot any failures -
Also thank you for the tip regarding printing separate parts, that's good advice to avoid wasting filament
RE: What causes the rest of the print to separate from the first layer?
I had the same issue, the problem is that you print very large flat surface.
When that surface cools down then the central area of the printed part warps upwards, which is causing nozzle to hit it.
If your adhesion is good then nozzle actually gets stuck in the printed part and literally shifts the whole print bed until an part gets skewed that the nozzle is released.
What helps:
- ensure there are no major temperature changes around the printer - have it in at least 22C room without drafts, or use enclosure (even basic one from the transport packaging helps :D)
- print big parts separately
- increase bed temperature
- adjust cooling in PrusaSlicer
See my GitHub and printables.com for some 3d stuff that you may like.
RE: What causes the rest of the print to separate from the first layer?
I had the same issue, the problem is that you print very large flat surface.
When that surface cools down then the central area of the printed part warps upwards, which is causing nozzle to hit it.
If your adhesion is good then nozzle actually gets stuck in the printed part and literally shifts the whole print bed until an part gets skewed that the nozzle is released.What helps:
- ensure there are no major temperature changes around the printer - have it in at least 22C room without drafts, or use enclosure (even basic one from the transport packaging helps :D)
- print big parts separately
- increase bed temperature
- adjust cooling in PrusaSlicer
Wow thank you so much for the in-depth reply, I really appreciate it 🙂
Actually the printer I was using was not in an enclosure - and is in the direct line of a draft that flows through the house - so I will reposition it and ensure to use an enclosure just to be sure.. that should definitely help!
Thanks again !!
RE: What causes the rest of the print to separate from the first layer?
Hi, check if slowing down the printer will solve the issue, still will hit, but slower so it will not loose coordinates after additional homing. If you observe that it's better, you can also slow down the printer in the slicer for particular file, by lowering the speed before the tricky layer. For that i use M220 S80 (slow down XYZE to 80%) for example on the beginning of the layer where i observed the collision, and continuing like that, in the end you should add again M220 S100, or just reset the printer, otherwise it will be 80%, otherwise you can also add to the gcode endcode M220 S100 in printer settings.