Difficulty
Moderate
Steps
10
Time Required
45 minutes
Sections
2
- How to unload filament on an Ender 3 Pro
- 4 steps
- Hotend
- 6 steps
Flags
1
Member-Contributed Guide
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Introduction
What you need
Step 1
Setting the nozzle temperature
- Press the knob to enter the marlin LCD menu and turn it to navigate between the options.
- Navigate to Temperature > Nozzle.
- Adjust the nozzle temperature by turning the knob and confirm by pressing it.
- Use whatever temperature you would be printing with, minus about 10°C. For both PLA and PETG 210°C usually works fine.
Press the knob to enter the marlin LCD menu and turn it to navigate between the options.
Navigate to Temperature > Nozzle.
Adjust the nozzle temperature by turning the knob and confirm by pressing it.
Use whatever temperature you would be printing with, minus about 10°C. For both PLA and PETG 210°C usually works fine.
1024
Step 2
Wait for the hotend to heat up
- Wait until the current temperature (bottom) matches the target temperature (top).
Wait until the current temperature (bottom) matches the target temperature (top).
Step 3
Pull the filament
- Press down on the extruder lever arm and pull out the loaded filament.
- Fully pressing down the lever arm might lead to the filament snagging when you try to pull it out. Just pressing it a bit will usually suffice.
Press down on the extruder lever arm and pull out the loaded filament.
Fully pressing down the lever arm might lead to the filament snagging when you try to pull it out. Just pressing it a bit will usually suffice.
Step 4
Set cooldown
- Navigate to Temperature and press Cooldown.
- If you do not have the Cooldown-option available, you can just repeat step one and set the temperature to 0°C instead.
Navigate to Temperature and press Cooldown.
If you do not have the Cooldown-option available, you can just repeat step one and set the temperature to 0°C instead.
Step 5
Hotend
- Remove the two screws from the fan housing using the 2 mm hex key.
- Pull the housing away from the hotend assembly and set the screws aside.
Remove the two screws from the fan housing using the 2 mm hex key.
Pull the housing away from the hotend assembly and set the screws aside.
Step 6
- Remove the silicone sock from the hotend.
- Now is a good time to clean the sock; old filament and debris can build up on the inside.
Remove the silicone sock from the hotend.
Now is a good time to clean the sock; old filament and debris can build up on the inside.
Step 7
- Remove the Bowden tube from the hotend or the extruder assembly.
- Remove the blue plastic clip from the push fitting.
- Push down on the grey part of the push fitting and simultaneously pull on the bowden tube.
- You can also do this with the bigger fitting on the hotend, if you want to reuse your tubing, but I wouldn’t recommend it since most hotends come with tubing anyways and the old tubing will most likely have degraded from the heating cycles.
Remove the Bowden tube from the hotend or the extruder assembly.
Remove the blue plastic clip from the push fitting.
Push down on the grey part of the push fitting and simultaneously pull on the bowden tube.
You can also do this with the bigger fitting on the hotend, if you want to reuse your tubing, but I wouldn’t recommend it since most hotends come with tubing anyways and the old tubing will most likely have degraded from the heating cycles.
Step 8
- Remove the two large screws from the heatsink of the hotend using the 2mm hex key.
- Pull the hotend away from the gantry.
Remove the two large screws from the heatsink of the hotend using the 2mm hex key.
Pull the hotend away from the gantry.
Step 9
- Remove the grub screw from the base of the hotend with the 1.5mm hex key.
- Set the grub screw aside.
- The grub screw is very small. Be careful not to lose it.
Remove the grub screw from the base of the hotend with the 1.5mm hex key.
Set the grub screw aside.
The grub screw is very small. Be careful not to lose it.
Step 10
- Lightly push against the heater cartridge using a hex key to remove it from the hotend.
- The new hotend has its own thermistor and cartridge, but it is easier to use the old ones as long as they are functional.
- If the heater cartridge cannot be removed with light force, heat the block to 240 degrees celsius. From this point on, grab the block with pliers.
- Remove the Phillips head screw to remove the thermistor, being very careful not to sever the thermistor wire.
- You may be working with hot parts in this step. Do not touch any pieces with your bare hands.
- The thermistor wires are fragile, and cannot be re-soldered. Handle with extreme caution.
Lightly push against the heater cartridge using a hex key to remove it from the hotend.
The new hotend has its own thermistor and cartridge, but it is easier to use the old ones as long as they are functional.
If the heater cartridge cannot be removed with light force, heat the block to 240 degrees celsius. From this point on, grab the block with pliers.
Remove the Phillips head screw to remove the thermistor, being very careful not to sever the thermistor wire.
You may be working with hot parts in this step. Do not touch any pieces with your bare hands.
The thermistor wires are fragile, and cannot be re-soldered. Handle with extreme caution.
To reassemble your device, follow these instructions in reverse order. Make sure that if you kept the original tubing, that the tubing inserted into the hotend is pushed all the way down.
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Nicholas Barrick
Member since: 09/08/2021
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Team
Embry-Riddle Aeronautical University, Team 1-7, Rauch Fall 2021
Member of Embry-Riddle Aeronautical University, Team 1-7, Rauch Fall 2021
ERAU-RAUCH-F21S1G7
2 Members
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