First layer prints too thin causing gaps everywhere I'd assume insufficient z offset but some areas of the first layer look fine. I've been struggling with this problem despite lots of attempts including z offset, infill overlap, belt retensioning, etc.

Anyone else experienced this type of issue and have suggestions to fix it properly? 

I'm using polylite PLA and a E3D steel nozzle. 60&nbsp;&deg;C bed temp, 230&nbsp;&deg;C first layer.

Edit: Print speed is 30&nbsp;mm/s first layer, 60&nbsp;mm/s normal. This issue occurs on the first few layers then the rest get increasingly better, with the final layer being excellent. 

Edit2: Despite lowering the temp to 205--210 and increasing the z offset downwards, the problem persists, though to a lesser degree. Just gaps at ends of infill lines and between straight and circular walls. But seems it only occurs on the lower left and upper right (birds eye view) of the print.



Edit3: The lower left and upper right being further from the nozzle coincides with my removal process using the knife on the lower left and upper right.. Maybe this part of the problem I'll have to bend back in place?

Nozzle bed measurements below:



Edit4: Optimizing the Z offset according to the first layer thickness remained only a partial solution especially as my bed unevenness (1mm+) was past the auto-leveling limitations (&lt;0.5mm), but I found a great thread (link below) with a "correct" solution that worked for a lot of people! After I try this I will come back and write about my experience with the solution.

https://forum.lulzbot.com/viewtopic.php?f=36&amp;t=7904&amp;hilit=bed+leveling+SOLVED
From the picture it is clearly seen that the filament is not flattened properly. This implies that your nozzle bed distance is too large. Try decreasing the gap by leveling the bed at temperature and have a piece of "A4" or "Letter" print paper between the nozzle and bed have a little friction when pulled.

Also reduce the temperature, 230&nbsp;&deg;C is too hot for PLA (unless your printer temperature is way off, but that is not very likely), try 200&nbsp;&deg;C.

Another thing that you could check is if the extruded length is exactly what is instructed to be extruded; i.e. calibrate the extruder.