Finishing ABS Print, Starting PLA Print
Hi-
I finished printing a small one-color ABS print without issue. When I went to load the PLA print, I brought the hotend to 255 and attempted to unload the ABS filament from E4. The filament jammed and I determined the jam was from a bulb end into the stainless steel tubes.
Two questions:
1. Should the printer immediately retract all filaments at the end of a print in order to avoid this while the active filament is still relatively soft?
2. What is the proper way to clear the nozzle of any ABS while switching to PLA? Do I run some PLA through at ABS temps? Is this necessary?
Thanks,
-Tom
Re: Finishing ABS Print, Starting PLA Print
1. Should the printer immediately retract all filaments at the end of a print in order to avoid this while the active filament is still relatively soft?
2. What is the proper way to clear the nozzle of any ABS while switching to PLA? Do I run some PLA through at ABS temps? Is this necessary?
1. I find that doing this prevents future issues. It is easily programmed in the End G-code.
2. I think that what you have suggested is fine.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Finishing ABS Print, Starting PLA Print
Here is the End G-code script from the MM Slic3r version for single material prints...
G1 E-4 F2100.00000
G91
G1 Z1 F7200.000
G90
G1 X245 Y1
G1 X240 E4
G1 F4000
G1 X190 E2.7
G1 F4600
G1 X110 E2.8
G1 F5200
G1 X40 E3
G1 E-15.0000 F5000
G1 E-50.0000 F5400
G1 E-15.0000 F3000
G1 E-12.0000 F2000
G1 F1600
G1 X0 Y1 E3.0000
G1 X50 Y1 E-5.0000
G1 F2000
G1 X0 Y1 E5.0000
G1 X50 Y1 E-5.0000
G1 F2400
G1 X0 Y1 E5.0000
G1 X50 Y1 E-5.0000
G1 F2400
G1 X0 Y1 E5.0000
G1 X50 Y1 E-3.0000
G4 S0
M107 ; fan off
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
G28 X0 ; home X axis
G91 ; Use Relative Coordinates
G1 Z10.0 F7200 ; Lift Nozzle by 10.0mm
G90 ; Use Absolute Coordinates
M84 ; disable motors