Project Dashboard Accessories and Upgrades LulzBot TAZ Dual Extruder Tool Head v3 Installation Instructions for TAZ 6 Workflow

1 Getting Started

By purchasing a LulzBot TAZ Dual Extruder v3 Tool Head, you're ready to begin combining colors and textures with support material for unique prints that are sure to turn heads. Well done! Follow the steps below to install your LulzBot TAZ Dual Extruder v3 Tool Head and explore the possibilities of printing with full geometric freedom.

LulzBot TAZ Dual Extruder v3 Tool Head

2 Included Materials

(1) LulzBot TAZ Dual Extruder v3 Tool Head

(1) Additional spool arm

(1) Feed tube spinner

(1) T-nut holder jig

(1) Idler jig

(1) Machined Z-axis endstop extension (for TAZ 6)

(1) 3D Printed Z-axis endstop extension mount (for TAZ 6)

(1) Dual v3 wiper mount (for TAZ 6)

(4) Wire tie

(1) M5 x 14 socket head cap screw (for TAZ 5)

(2) Extension harnesses

(1) M5 washer (black)

(1) Feed tube

Included materials

3 Additional Items Required

You will also need

  • Metric hex drivers: 4 mm, 3 mm, 2.5 mm included with your LulzBot TAZ toolkit
  • LulzBot TAZ 6 Desktop 3D Printer
  • USB cable, included with your LulzBot TAZ
  • GNU/Linux, Mac OS X, or Windows-based computer
  • Scissors or wire cutters for cutting zip ties
Other things needed

4 Home the Z-Axis

Power on your LulzBot TAZ 6 3D Printer.

Home your 3D printer by using the Graphical LCD controller.

Raise the Z-axis through the Graphical LCD controller.
Navigate to: Movement > Move Axis > Move Z > 1.0 > Change the value to at least 200.

After the Z-axis stops moving, push the X-axis carriage over by hand to the middle of the X-axis.

Position the Z-axis

5 Prepare Printer

Completely power off your LulzBot 3D Printer and unplug the power supply before proceeding.

Note: Users that have already installed the Dual Extruder v2 tool head can skip down to step 8, since the secondary spool arm, feed tube, and extruder harness should be connected already.

Unplug power to printer

6 Install Secondary Spool Arm and Feed Tube

Loosen the existing spool arm and slide it down about 2 inches (50 mm), then tighten it.

Your TAZ 6 3D printer has the second spool bracket t-nut installed underneath the existing spool arm. You will not need the t-nut included with your Dual Extruder Tool Head v2. Remove the t-nut from the new filament bracket.

Note: TAZ 5 users should be referring to the TAZ 5 Dual Extruder v3 install tutorial

Use the M5 screw to install the 3D printed secondary filament spool arm.

Place two spools of filament on the spool arms to ensure they are mounted with sufficient space to rotate during printing.

Attach the secondary filament guide tube included with your new dual extruder, matching the existing feed tube orientation.

Spacing between spools (front)
Spacing between spools (side)
Remove t-nut from filament bracket
Attach bracket
Attach guide tube to bracket

7 Connect Secondary Extruder Harness

Unscrew the cap on Extruder 2 on the back of the electronics box on your LulzBot TAZ 3D Printer, and plug in the secondary extruder harness into the Extruder 2 connector.

Route the new harness next to the existing one on your printer, using zip ties to secure it to the same spots.

Use the final zip tie to secure the new secondary extruder harness into the empty harness holder on the top left side of the X-carriage.

Connect harness
Attach harness to frame

8 Remove Existing Tool Head

Unplug the connectors for your current tool head.

With one hand support the tool head and unscrew the single M3 screw securing it to the X-axis carriage.

Remove the tool head from the 3D printer by lifting the tool head up.

Note: In previous versions of our tool heads, the Esteps were listed along the back of the tool heads for the customer to update. For the new v3 tool head however, the Esteps are now set up within the firmware, and no manual updates are required.

Unplug connectors from tool head
Support tool head from below

9 Mount New Tool Head

Install the Dual Extruder Tool Head v3 by seating it on the X-axis carriage and secure it with the M3 screw that you removed in the previous steps.

Use one hand to support the tool head.

Support tool head, screw in M3 screw

10 Plug in Tool Head

Remove the protective foam.

Connect the primary extruder harness (existing harness) to right (E2) connection on tool head, taking care to note polarity.

Connect the secondary extruder harness (new harness) to the left (E1) connection on tool head, taking care to note polarity.

Make sure the connectors are not against any moving parts and tuck into X-axis carriage notches.

Verify the connectors are appropriately connected before proceeding

Remove protective foam
Connect primary extruder harness to right (E2) connection
Connect secondary extruder harness to left (E1) connection
Tool head plugged in

11 Install Z-axis Mini Toggle Extension

Slide toggle extension into toggle mount.

Clip toggle mount onto Z-axis switch.

Note: The Z-axis Mini Toggle Extension should only be used on the Dual Extruder v3 Tool Head. Leaving this extension on the printer and using it with other tool heads will cause failed probes due to the higher registered minimum position. Symptoms include the nozzle wiping above the pad when self-cleaning, and the tool head failing to touch the bed corners when self-leveling.

Toggle extension and mount
Toggle extension and mount together
Toggle mount on Z-axis switch
Toggle extension Installed

12 Install Dual V3 Extended Wiper Pad

Unscrew and remove current wiper pad and frame.

Put new wiper pads in place.

Screw in extended wiper pad frame.

Remove current wiper pad
Insert new pads
Screw in extended wiper pad frame

13 Install Cura LulzBot Edition

Install the latest version of Cura LulzBot Edition. It is important to have the LulzBot Edition of Cura, as it has preset machine configuration profiles built into it.

Go here to install Cura LulzBot Edition

Plug in your LulzBot TAZ 3D printer to the power supply and power on your 3D printer.

Once powered on connect your 3D printer to your computer using the USB cable.

Open Cura LulzBot Edition.

Open Cura LulzBot Edition

14 Set-up New Tool Head in Cura LulzBot Edition

Select Settings dropdown > Printer > Add Printer.

Select LulzBot TAZ 6 DualExtruder V3 and click Finish.

Select settings dropdown
Select LulzBot TAZ 6 DualExtruder V3

15 Update Firmware

Power on the printer.

Select Settings dropdown > Printer > Manage Printers

Confirm the LulzBot TAZ 6 DualExtruder v3 is selected, and click Upgrade Firmware

NOTE: Follow the instructions displayed on screen and [linked here] to record and restore your Z-axis offset.

Select Settings dropdown, Printer, Manage Printers
Upgrade firmware
Record Z-axis Offset

16 Load First Print into Cura LulzBot Edition

Download the recommended first print: Impossible Gear and load it into Cura.

Adjust the default print settings to match the first print materials: Polylite PLA and PolyDissolve S1 by following steps below:

Confirm selections for Extruder 1: Extruder 1 tab > Material drop down, select Polylite PLA > Profile, select Standard Quality .

Select Extruder 2 tab > Material drop down: PolyDissolve S1

Click the Generate Support box in the Print Setup area, and verify that Hot End 2 is selected to activate the support material.

Extruder 1, under Material select PolyLite PLA
Extruder 2, under Material select PolyDissolve S1
Activate Generate Support

17 Switch to Printer Monitor Tab

In the top of the Cura LE window, click the Print Monitor Tab button, as shown in the image. Steps 18 and 19 are implemented through this tab's settings.

Print Monitor Tab

18 Connect to Printer

Check that Cura LulzBot Edition shows USB devices detected then click on the Connect button.

Wait for message to show Connected via USB.

Available USB devices
Click Connect
USB device connected

19 Set Hotend Temperature

Insert temperature as 205°C for Extruder 1.

Select Pre-heat.

Insert temperature as 220°C for Extruder 2.

Select Pre-heat.

Note: If you scroll down, another option is available to assign to temperature values to each extruder, as shown in image. Enter in the same value for each each extruder as shown above, then select Heat extruder.

Temperature value input box for Extruder 1 and Extruder 2
Alternate option for assigning temperature value to extruders

20 Remove Factory Filament

Once extruders reach temperature, remove test filament used during factory calibration.

Note: To remove filament, wind gear counterclockwise for Extruder 1, and clockwise for Extruder 2. OR, you can also squeeze idler inwards, and pull filament out.

Factory filament in tool head
Wind gear as shown to remove filament
Squeeze idler inwards and pull filament out

21 Insert Printed Jig and Tighten Idlers

To prevent the filament from stripping, it's important to calibrate both of the idlers before loading in the new filament.

Locate the printed idler jig included with your LulzBot TAZ Dual Extruder v3 Tool Head.
Note: The 3D printed idler jig is green in these images for visibility, but will be black in your included items.

Insert 3D printed idler jig next to an idler, as shown in the image.

Adjust each idler onto the printed jig one at a time. They should be tightened until the black head of the idler makes contact with the jig. Do not overtighten. The printed jig should be able to slide out easily.

Printed idler jig moving into correct placement
Printed idler jig in place
Tigthen idler onto printed jig

22 Filament Path for the v3

In order to keep the Dual Extruder v3 as compact as possible, the filament path was designed differently than on Standard LulzBot Tool Heads. Steps for inserting filament are further detailed below:


23 Load Filament

Clip end of filament with scissors to form a slanted point. This will improve the insertion effectiveness of the filament as it reaches the channel.

Load Polylite PLA in Extruder 1 (left), and PolyDissolve S1 in Extruder 2 (right). Slightly pull back on the idler arm and insert the filament from a 45° angle.

Once the filament stops, you may need to wiggle the filament until it slides in farther.

Rotate the gears by hand to help pull the filament into the tool head. Clockwise for Extruder 1, counterclockwise for Extruder 2.

Note: If you're still experiencing difficulty loading the filament, slightly loosen the idler tension by half-turn increments to allow for more space on the filament path. It's possible for the filament to emerge from the back of the extruder during loading, simply remove and try loading again. Make sure the filament end is clipped at an angle to reach the channel.

Purge factory filament by rotating gears by hand for both extruders until extrusion transitions into the sample filament.

Clip filament so it forms a pointed angle
Slightly pull on idler arm and insert filament at 45 degree angle
Wiggle filament and push again
Filament path highlighted
Correctly inserted filament
Purge remaining factory filament

24 Start Your First Print

Click the Start button.

Click Start in Cura

25 Remove Finished Print

Wait until bed cools to recommended part removal temperature.

Use blue handle knife to lift print off of bed.

Remove test model after bed cools

26 Let Print Sit in Water

We recommend placing the print in water and letting it sit to allow the soluble support filament to loosen and come off naturally. Change water and rinse the printed object every hour or two, depending on the size of the print.

Optional: Structural support may soften after 30 minutes and can be removed using additional tools, such as a tweezer or dentist pick. If not soft enough, print will need to be agitated and water refreshed regularly to further dissolve filament.

First print with structural support removed

27 Enjoy Unrestricted Printing with Full Geometric Freedom!

You've now finished installation and are ready to explore new territories of 3D printing with your Dual Extruder v3!

Done! Take me home