Hey guys,
I have a problem. My printer doesn’t wanna close the gaps between the lines on the first layer. I meanwhile tried printing closer to the bed. I am now printing my first layer at 0.2mm.
I also tired bumping the first layer width to 200%
What can I do?
BTW I’ve printed this model inumerous times on my prusa i3 mk2 and it comes out fine.
Probably your nozzle is too far from your print bed. Do a recalibration.
@Eddy_Castro I already did 0.15mm and 0.2 and calibrated the bed with a feeler gauge before each try
is this the first model layer or the first raft layer? Some slicers allow for adjustable solidity of the raft grid.
@Krasimir_Nikolov this is the model’s first layer
Filament diameter setting in your slicer?
@Rudy_Van_Parys 1.75
Filament diameter problem or maybe the nozzle is a bit drity, reducing flow of material?
@Jan_Wildeboer also checked the nozzle. Seems fine to me. I use this filament in my prusa i3 mk2 with no problems
@Max_Moors Did you stop the print after this? Or did you print it completely? If the rest of the layers look fine it shouldn’t be a problem with the extrusion amount. But if the other layers are also printed with less material as expected, I would suspect filament diameter is on the low side. Can you measure the filament diameter with ia micrometer?
It might also help to bump up the temperature. Maybe it doesn’t get hot enough to squeeze the filament enough.
@Jan_Wildeboer just measured the filament and it is sitting at ~1.74,1.76
The temperature for the first layer is 210
I stopped it right after
From the picture it looks like underextrusion, though the outline seems to be OK. Also the dot-like looks in the fill suggest a problem with continouous flow of material.
From that I suspect sth in the nozzle interfering with the free flow. I would try a few cold pulls to clean it up and see if that fixes it.
At what speed are you printing? 210′C for PLA is very hot IMHO. So I reverse my suggestion and suggest trying again with 190-195.
@Jan_Wildeboer the dot is there because I stopped it there. But I’ll try a couple of cold pulls and see what happens.
Thanks
@Jan_Wildeboer I would go down in temperature but as I’m printing on a pei sheet it isn’t advisable to do less than 200.
I set it up so that the first layer is at 210 and the rest is at 200.
I’m printing the first layer at less than 20mm/s or 20% of 60mm/s to be more exact
@Jan_Wildeboer just did a cold pull and it looks normal
@Max_Moors Hehe. Yeah. The dirt in a nozzle can be so small it’s hard to see. I bring the nozzle up to full heat and then poke a thin needle through it to move particles that might are stuck free enough to get pulled out.
If it solves the problem, I don’t really care if I can see the culprit or not. I’m pragmatic.
But high temp and slow speed explains the “bubbly” appearance IMHO. PLA does that when it gets hot.
Try to increase flow rate…
@Marco_Medeiros I’m now printing the model to see if it is under extruding on the normal layers
This is the top layer. Looks like the extrusion multiplier is correct but then the first layer doesn’t look like a good layer due to the separation of the extrusions