Second layer printing issues - Hardware, firmware and software help https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/ Prusa3D Forum Discussion Board en-US Mon, 08 Jun 2026 12:26:09 +0000 wpForo 60 RE: Second layer printing issues https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759900 Sun, 03 Aug 2025 16:09:40 +0000 Thanks.  I am using PLA.  I'll try the extrusion multiplier.

]]> Hardware, firmware and software help Mike https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759900 RE: Second layer printing issues https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759893 Sun, 03 Aug 2025 15:38:47 +0000 I can't use speed on PETG either only PLA. I hope future firmware will fix it. Try setting your extrusion multiplier to 0.97. That kooks like you are overextrusion.

]]> Hardware, firmware and software help Flex https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759893 Second layer printing issues https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759618 Fri, 01 Aug 2025 15:34:35 +0000 I'm having a problem printing with the Speed profile on my Core One.  I've attached a photo for reference.  The first layer prints fine, but then when the printer speeds up for the second layer, you can see there are all kinds of issues.  I am using the Prusa HF Obxidian 0.4 nozzle.  I've already tried the following:

Replacing the nozzle

Adjusting belts, idler tension, etc.

Replacing the Nextruder back plate.

It seems to work fine when I use the Structural setting and things slow down.  

Any thoughts?

]]> Hardware, firmware and software help Mike https://forum.prusa3d.com/forum/prusa-core-one-hardware-firmware-and-software-help/second-layer-printing-issues/#post-759618