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Sorry for late reply, didn't get the notification. Printer's main board is from Anet A8 (it's modded Anet A8 ). The head heats up, I can see it on the screen and measured temperature of the heating element. As I previously said, I managed to get 1 succesful print after slicing in Cura. I printed few first layers of this model again and it turns out it had the same issues on first layer, but because it had big solid bottom layer, filament 'cached' the bead. This first layer was a bit deformed, but other layers looked good. Adding T0 don't change anything. It looks like only first layer have under-extrusion issues. I didn't find an option to increase flow rate on first layer only, so I increased overal flow and it's a bit better, but the filament is still being dragged around. # ^ I wrote that yesterday, but decided to hold on a bit more and tweak settings and the machine a few times I decided to fully take apart my extruder, reassembled it, cleaned glass, re-leveled printer and started printing Benchy a bit slower and few settings tweaked and ... I never got first layer so clean. All the layers seem to be better than ever, I hope the print will finish well. Thanks for your help.

I have switched to Cura. After succesfully getting my first print using gcode from Cura I decided to print 3D Benchy to compare it to ones printed after slicing with another software. Unfortunately this time it look like there is not enough filament comming out on first layer. I have tried adjusting settings a few times, every time it failed. Nozzle isn't clogged cause it prints other gcode without issues. Also something is stopping part of starting gcode from executing (using the same starting gcode in another slicer and it works). It's supposed to prime the nozzle, but this doesn't happen. Here is beginning of my Cura generated gcode: ;Generated with Cura_SteamEngine 2.6.2M190 S60M104 S200M109 S200G21 ;metric valuesG90 ;absolute positioningM82 ;set extruder to absolute modeM107 ;start with the fan offG28 X0 Y0 ;move X/Y to min endstopsG28 Z0 ;move Z to min endstopsG1 Z15.0 F9000 ;move the platform down 15mmG92 E0 ;zero the extruded lengthG1 F200 E3 ;extrude 3mm of feed stockG92 E0 ;zero the extruded length againG1 F9000M117 Printing...;LAYER_COUNT:320;LAYER:0M107M205 X30G0 F3085.7 X82.375 Y100.618 Z0.2G0 X82.803 Y100.356M205 X20 And ideaMaker for comparison: M221 T0 S95.00M140 S55.00M104 T0 S210.00M109 T0 S210.00T0M190 S55.00G21G90M82M107G28 X0 Y0G28 Z0G29G1 Z15.0 F9000.00G0 X2 Y2 Z2G92 E0G1 F200 E25G92 E0G1 F9000.00M117 Printing...M1001;LAYER:0;HEIGHT:0.300M106 S0G1 F2400 E-4.5000G0 F9000 X83.579 Y102.247G0 F1500 Z0.300 Any hints to what might be causing the problem will be appreciated.