First few layers are very bumpy & at the edge of bed completely failing to stick
Hello,
I have encountered this problem at one joint workshop (where you reserve your time slot for printer). The guy there didn't know how to help so I am asking here (I have now paused the print). So, I am printing houses for my architectural model. I have problem with first layers not printing properly, as you can see in the images. For preparation of one file made in Rhino, other part in sketchup (and exported as .slt and .obj and then combined in PrusaSlicer). I have sliced file into Gcode and I checked its 0.4 nozzle and PLA set correctly.
During printing, brim was failing on one corner, so repositioned my model (that fills up almost whole 36x36cm space) and exported Gcode again (and restarted print anew). Now brim started failing on the other side. I paused print, cut it with scissors and resumed. Again, this corner seemed to be problematic and during printing of 2nd layer completely failed. Also, as you can see, printing is not really "clean". Do you have any suggestions how to fix this?
p.s.: I have attached a video of printing
RE: First few layers are very bumpy & at the edge of bed completely failing to stick
For the poor adhesion in the corner, I would give the build plate a really good clean with Dish Soap and Hot water using a NEW dish sponge (Not a possibly greasy old one...) then rinse well with hot water and dry immediately with plain paper towels
Keeping your fingers off the top surface of the build plate. 
the first layer looks to have ripples in the surface and ridges where the nozzle is carving through raised areas of filament.
this is because the first layer is too low... You can adjust Z height whilst the printer is printing, I would raise the Nozzle (Z height) a little to reduce the ripples
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK