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First few layers of a print are rough  

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RichardL
(@richardl)
Member
First few layers of a print are rough

Hi - I've just moved from an UpBox printing ABS to a Prusa Mk4 with PLA and am slowly trying to get to grips with the settings to get a good quality print.  With the ABS/UpBox, I printed a raft and the model detached from the raft very cleanly leaving a smooth surface.  I have tried the PLA/Prusa with and without a raft but I get the sort of surface shown in the photo (although the rest of the print is OK).  Can you please suggest settings that will result in a smooth base of the model. I'm running 0.2mm layers but left the first layer at the default 0.35mm.  Perimeters 30mm/s.

Thanks

Richard

Posted : 26/08/2024 11:52 pm
aaaaaa
(@aaaaaa)
Member
RE: First few layers of a print are rough

Hello Richard, I see that you are printing ABS. That usually requires a heated enclosure as ABS warps easily.

Posted : 03/09/2024 3:45 pm
iftibashir
(@iftibashir)
Honorable Member
RE: First few layers of a print are rough
Posted by: @aaaaaa

Hello Richard, I see that you are printing ABS. That usually requires a heated enclosure as ABS warps easily.

OP is printing PLA on the Prusa, so enclosure is not required (although it will be for ABS of course).

OP - the first layer should be completely flat - seems like you do not have enough 'squish', although the MK4 should do this automatically. Does it go through the calibration and bed probing successfully before the print begins?

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Posted : 04/09/2024 9:19 am
SpectraV3i
(@spectrav3i)
Active Member
RE: First few layers of a print are rough

Make sure the part is flat on the plater.

Posted by: @richardl

Hi - I've just moved from an UpBox printing ABS to a Prusa Mk4 with PLA and am slowly trying to get to grips with the settings to get a good quality print.  With the ABS/UpBox, I printed a raft and the model detached from the raft very cleanly leaving a smooth surface.  I have tried the PLA/Prusa with and without a raft but I get the sort of surface shown in the photo (although the rest of the print is OK).  Can you please suggest settings that will result in a smooth base of the model. I'm running 0.2mm layers but left the first layer at the default 0.35mm.  Perimeters 30mm/s.

Thanks

Richard

 

Posted : 10/09/2024 3:50 pm
corefile
(@corefile)
Member
RE: First few layers of a print are rough

If by "heated enclosure" you mean actively heated enclosure, no - absolutely do not need a heated enclosure. I have hundreds of hours printing ABS without a heated enclosure. A enclosure yes - but not an actively heated enclosure. ABS is the recommended filament in Voron builds and most of us are using Voron's with just a standard non-actively heated enclosure to print ABS.  

As to the OP - does this first layer issue happen with your other prints? As others have already mentioned - if you've gone through the calibration process, you should then get pretty much spot on first layers. If its isolate to this print only with PLA - and that looks like prusament galaxy PLA - I would start looking at things in your slicer

Posted : 14/09/2024 2:51 pm
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