Filament PLA not working/sticking
My filament won't stick to the bed. Some places it does and some places it doesn't, but the filament gets draged all over the place. The first "pre" line or whatever works fine, but the actuall print doesn't. I have adjusted the Z, cleaned the bed and done both hot and cold pulls, and the filament pours out(not much but 1-4cm at times) while calibrating the 9 points before the print so that filament sometimes even gets stuck on the nozzle.
What more can i do?
Re: Filament PLA not working/sticking
for the 9 point startup to reduce getting stuff stuck to the nozzle. lift the nozzle using Z axis up away from the bed.
start preheat in the material you will use. walk away for like 10 minutes.
come back and clean the ooze off, now i like to use a Brass brush, where the hairs of the brush are brass not nylon or steel. and i lightly scrub the nozzle surface to clean it. i also use a Sock on my Extruder.
the preheat releases the pressure inside the extruder from the last use. start your print. the extruder/nozzle will come down and start the 120sec Pinda calibration then the 9 point height check starts.
the first operation is to re-pressure the extruder with the first line outside the print area.
that solves the oozing on start up issue.
for the second issue your live Z could still be too high. run some .2 height by 100x100mm boxes and really see how the Live Z is calibrated the prusa firmware live Z gets you in the ball park then you need to fine tune it with an external STL file.
when you get a good adhesion and you like the way the layers diagonally look go back and start your first real print.
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Re: Filament PLA not working/sticking
This the the start g-code that I use, it heats the bed up first, then heats the hotend to 130C before the bed level, then does the bed level while continuing to heat the hotend, then finishes heating the hotend and the print starts (including the intro line). I never have an issue with oozing on the bed and this automates most of the process except for having to clean the nozzle off after each print.
M115 U3.1.0 ; tell printer latest fw version
M83 ; extruder relative mode
M140 S[first_layer_bed_temperature] ; set bed temp
G28 W ; home all without mesh bed level
G1 Z1 F3000.0 ; raise nozzle
M190 S[first_layer_bed_temperature] ; wait for bed temp
M109 S130 ; wait for hotend temp 130C
M104 S[first_layer_temperature] ; set hotend temp
G28 W ; home all without mesh bed level
G80 ; mesh bed leveling
G1 Z0.5 F3000.0 ; raise nozzle
M109 S[first_layer_temperature] ; wait for hotend temp
G1 Y-3.0 F1000.0 ; go outside print area
G1 X60.0 E9.0 F1000.0 ; intro line
G1 X100.0 E12.5 F1000.0 ; intro line
For your issues with the PLA not sticking to the bed I would recommend redoing the calibration file that comes with the printer and see if you can adjust the z height down enough to get it to stick. Also, I've found that higher percentage isopropyl alcohols work better than lower percentage ones. Ex: 90% alcohol vs. 80% alcohol.