Dremel 3D20 Idea Builder User manual

Read the Dremel 3D20 manual and these
instructions before replacing the hot-end
assembly in your Dremel 3D20. Failure to comply with the
warnings and instructions may result in fire, equipment
damage, property damage, or personal injury.
Always unplug Dremel 3D20 from its power before per-
forming any service procedures. Failure to do so may
result in personal injury and equipment damage.
Use only Dremel approved materials and components.
Use of object materials, or 3D objects other than Dremel
approved object materials and genuine Dremel components
may void warranty.
Repairs on the Dremel 3D20 may require the use of special
tools (pulling devices and bearing press). Authorized repair
centers have trained repair technicians and equipment nec-
essary to perform these repairs.
For the location of the repair center near you, please call
1-844-4DRML3D (1-844-437-6533) Monday thru Friday, 8AM
to 6PM CST. r, look on our web site at www.Dremel3D.com
and follow the link for ‘Support’.
3D20 Hot-end Assembly
Replacement
ARNING
!
PROCEDURE
CONTINENTAL UNITED STATES CANADA
Dremel Service Center
4915 21st Street
Racine, WI 53406
Phone: 1-844-4DRML3D
Giles Tool Agency
47 Granger Ave,
Scarborough, N
M1K 3K9, Canada
Phone:[phone]
West Coast Tool
4008 Myrtle Street
Burnaby, B.C. V5C 4G2
Phone: [phone]
This service document will outline the steps to replace the
hot-end assembly within the extruder, for the 3D20. This
guide should only be used if a replacement part has been
sent to you by Dremel customer service. The replacement
of the hot-end assembly may be needed if a clog occurs that
cannot be fixed with the unclog tool.
Tools Required:
The following list of equipment should be available prior to
the rework.
• 2.5mm Hex wrench (Allen key)
• Scissors
Step 1: Bring the printer to a safe state for
service
1. Cut any filament running into the extruder.
2. Run the load command from the filament screen. Allow
filament to run into the extruder for at least 5 seconds after
the end of the filament enters the extruder intake.
3. Exit the filament loading screen, and allow the printer to
reach a state where the icon reads “cool” on the screen.
4. Turn off and unplug the printer.

2
Step 2: Disconnect all electrical wires from
the extruder
1. Disconnect all four wires from the extruder, as pictured.
Always be sure to pull the connectors by the plastic, and
never by the wires. Pulling by the wires can damage the
connectors.
Step 3: Remove the front fan and extruder
motor
1. Unscrew the two screws in front of the extruder fan using
the 2.5mm hex wrench.
2. Remove the front fan and heat sink, ensuring that the parts
attached to the screws do not fall. These parts can be
removed from the extruder as an assembly.
3. Remove the motor from the back of the extruder.
Step 4: Remove the turbo fan from the side of
the extruder
1. Remove the screw on the bottom left corner of the
extruder, as shown below. Removing this screw also
removes the fan baffle from the extruder.
2. Remove the back left screw from the extruder.
3. Pull the turbo fan away from the mounting carriage.

3
Step 5: Unscrew the hot-end assembly from
the mounting carriage
1. Remove the left and right hand screws from the bottom of
the extruder mounting carriage.
2. Remove the hot-end assembly from the mounting bracket.
Step 6: Replace the hot-end assembly
1. Place the new hot-end assembly on the mounting bracket.
2. Using the 2.5mm hex wrench, insert and tighten the 2
mounting screws into the bottom of the bracket (shown in
Step 5: 1) to attach the new hot-end assembly.
Step 7: Replace the extruder on the mounting
bracket
1. Taking the heat sink and fan assembly, place the front
mounting screws through the aluminum block. Place the
extruder motor on the back of the extruder and screw in
the two screws.
2. Reconnect the four wires to the extruder, as shown. Be
sure to properly manage the wires next to the extruder.
• The blue and orange wires connect to the two clear
wires on the extruder.
• The black and red wires connect to the black and red
wires on the extruder.
• The red and blue wires connect to the white and red
wires on the extruder.
• The long connector attaches to the motor on the
extruder.

Congratulations!
You are now ready to build. Build On.
2610038113 08/16
3. Replace the back left screw, through the bottom of the
turbo fan mount, into the bottom of the extruder mounting
carriage.
4. Insert the 2.5mm hex screw onto the fan baffle and guide
the fan baffle into place on the extruder. Tighten the screw
to mount the fan baffle on the extruder.
5. You have now successfully installed the new hot-end
assembly.