3ntr A4 V2 Manual de inicio rápido - Página 16

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Changing filament type

When dealing with different polymers, procedure is a bit different.

Start with a "cold" extruder situation: turn on heating for desired extruder, at about

60-70% of the currently loaded polymer working temperature.

Release the feed mechanism and lock it open.

Start pulling (not too strong to break it... but also not too weak, to win over the

extruder suction). If you managed to remove a two-cone filament tip, you have

1. New polymer has higher melting point than the old one (i.e.: changing

from PLA to ABS)

1. Turn on heating for the desired nozzle, set it at current (old) filament

temperature

2. Remove filament following the same procedure used for filament change

3. Slowly feed in the new filament: can do it manually, or using front panel

commands, or the PC host software manual commands

4. When you see that filament flow is decreasing / feeding is difficult / color

is changing (if new filament color is different), need to change

temperature: set extruder temperature to match the needed one for new

filament. Wait for extruder temperature to settle

5. Feed 50mm at 50mm/minute with manual command. See if filament is

coming out of the nozzle freely.

6. Done!

2. New polymer has lower melting point than the old one (i.e.: changing

from ABS to PLA)

1. Turn on heating for the desired nozzle, set it at current (old) filament

temperature

2. Remove filament following the same procedure used for filament change

3. Slowly feed in the new filament: can do it manually, or using front panel

commands, or the PC host software manual commands

4. As soon as you have started pushing out some filament from the nozzle,

decrease temperature to match the needed one for new filament.

5. DON'T WAIT for temperature to go down, otherwise you couldn't push out

of the extruder all the remains of old polymer.

6. Feed 50mm with manual command. See if filament is coming out of the

nozzle freely.

7. See if filament is coming out freely and without any remains of previous

filament.

8. Done!