First layer is okay. Next layer has gaps???? - Assembly and first prints troubleshooting https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/ Prusa3D Forum Discussion Board en-US Tue, 12 May 2026 21:23:06 +0000 wpForo 60 RE: First layer is okay. Next layer has gaps???? https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720378 Fri, 30 Aug 2024 09:09:10 +0000 Now have again finetuned my bedlevel and Z-adjust. 

First layer looks absolutely fine. Perhaps a little bit of linear advance finetuning could make it even better. But it should not interfere with following layers.

The second layer still has gaps inbetween. I think through the whole layer. It looks not exactly like above (not any more). Now it looks like there is constantly not enough flow so the neighboring lines do not connect. Third layer again is perfect. 

 

]]> Assembly and first prints troubleshooting Saphir https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720378 RE: First layer is okay. Next layer has gaps???? https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720370 Fri, 30 Aug 2024 07:10:03 +0000 Does it happens everywhere in the bed or is it always in the same spots?

Try to z level, and use this guide (step 10-18) to check the bed, i had a problem like this with my mk3s+ and i fixed it installing the nylock mod.

]]> Assembly and first prints troubleshooting raff96 https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720370 RE: https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720197 Wed, 28 Aug 2024 09:31:45 +0000 I have the same problem. Everything worked before the Upgrade from MK3S+ with MMU. The problem gets worse, the less filament is extruded and better (but not solved ) when the temp is reduced (down to 205°C in my case). 

Printing speeds do not significantly differ from MK3S+ in my test scenario. 

Tried this:

- adjusted idler screw tension in both directions

- dried my filament

- reduced speed

- higher temp

- reduced temp

- rerunned temp calibration

- readjusted Z-Adjust

- finetuned bedlevel

- inspected Bondtech gears and teeth

- shortened filament path and reduced friction to absolute minimum

- tried different profiles (MK3.5 single profile and MK3.5 with MMU profile and my MK3S+ with MMU filament profiles)

- tried other filaments

- cold pulls

- changed nozzle

I have no idea what to try next. Revo hotend/high flow nozzle? But why isn't one in the packet if needed? With the extra money for this I could almost have had a 3.9...

@andypants : could you get it to work? How?

]]> Assembly and first prints troubleshooting Saphir https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-720197 RISPONDI: First layer is okay. Next layer has gaps???? https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-714449 Sun, 23 Jun 2024 20:52:17 +0000 ... or the tension between the spool and the extruder is too high.

It is clearly under extrusion.  Do you have also the MMU ?

Regards

]]> Assembly and first prints troubleshooting Antimix https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-714449 RE: First layer is okay. Next layer has gaps???? https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-706349 Tue, 02 Apr 2024 12:07:16 +0000 The bondtech gears might be slipping with the higher speeds on second layer if it has too low pressure on the filament

]]> Assembly and first prints troubleshooting Aemilka https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-706349 First layer is okay. Next layer has gaps???? https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-701314 Sun, 25 Feb 2024 21:40:24 +0000 is this from the new upgraded speed? I’ve tried temp increase, flow increase, and speed reduction  with marginal effect

]]> Assembly and first prints troubleshooting AndyPants https://forum.prusa3d.com/forum/original-prusa-mk3-5-assembly-and-first-prints-troubleshooting/first-layer-is-okay-next-layer-has-gaps/#post-701314