Project Dashboard Hot End & Tool Head Assembly LulzBot HS+ Tool Head Assembly and Packaging Workflow

1 Gather materials

1x- [AS-CB0061] Extruder Motor Harness v2Aero
1x- [AS-CB0062] v2Aero Extruder Blower Harness
1x- [AS-CB0063] v2 Aero Zero Sense Harness
1x- [AS-CB0064] v2Aero Heatsink Fan Harness
1x- [AS-CB0066] v2Aero Thermistor Harness
1x- [AS-HE0033] v2 HS+ 1.2 Hotend Assembly
1x- [PP-IS0069] Blower Shroud with Inserts
1x- [PP-IS0074] Extruder Mount with Inserts, v2 Aero
1x- [DC-LB0164] Caution Hot Symbol Size, 1.2mm
1x- [EL-MT0029] NEMA 17 Stepper Motor, Moons' - NOT INCLUDING wire harness
4x- [HD-BT0039] Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 12MM Length, 0.50MM Pitch
1x- [HD-BT0042] Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 30MM Length, 0.50MM Pitch
3x- [HD-BT0043] Metric Class 12.9 Socket Head Cap Screw, Alloy Steel, M3 Thread, 35MM Length, 0.50MM Pitch
2x- [HD-BT0146] M3 x 12 BHCS, Black Oxide, Class 10.9 Steel 2.0000 PCE
2x- [HD-BT0171] Black Oxide Class 10.9 Steel Button-Head Socket Cap Screw M3 Size, 20 mm Length, .5 mm Pitch
1x- [HD-BT0197] M4 Thumb Screw for Aero
1x- [HD-MS0430] Idler Spring for Aero
2x- [HD-MS0446] MR95-2RS Radial Ball Bearing Double Sealed Bore Dia. 5mm OD 9mm Width 3mm
1x- [HD-NT0011] M4 Nut, Steel, Zinc Plated 1.0000 PCE
1x- [HD-WA0027] Metric 18-8 Stainless Steel Internal-Tooth Lock Washer, M3 Screw Size, 6MM OD, .4MM Min Thick
2x- [HD-WA0038] Black-Oxide 18-8 Steel Flat Washer, M3 Screw Size, 3.2mm ID, 7.0mm OD 2.0000 PCE
1x- [PP-FP0135] E3D Aero Idler Lever
1x- [PP-FP0136] E3D Mirrored Aero 2.85mm Filament Guide
1x- [PP-FP0154] Titan Extruder Hobb (Hardened Stainless Steel)
1x- [PP-MP0204] Aero Mirrored Body w/ Threaded Insert
1x- [PP-MP0205] E3D Aero Steel Pinion Gear w/ set screw

Materials

2 Install drive gear onto motor

Install the drive gear [PP-MP0205] onto the flat side of the motor shaft [EL-MT0029] using the printed drive gear spacer jig as shown. Torque the set screw to 5 in * lbs.

A set screw should come pre-installed in the gear, if not, ensure an M3x3 set screw is used. Set screws of any greater length will interfere with the larger gear during operation.

Thickness of the printed spacer is 5mm

Installing
Torquing

3 Install internal lock washer & sealed bearing

Install one sealed MR95ZZ bearing [HD-MS0446] into the extruder body [PP-MP0204] as shown.

Install the internal lock washer [HD-WA0027] as shown.

1
2
3
4

4 Assemble extruder body, mount and motor

Using one M3 x 12 BHCS [HD-BT0146], fasten the extruder body [PP-MP0204] to the motor through the printed mount [PP-IS0074].

Materials
Assembling
Assembling

5 Install bearing into heatsink

Install the bearing [HD-MS0446] into the heatsink [AS-HE0033] as shown.

Ready
Installed

6 Verify correct nozzle

To verify the correct E3D Volcano nozzle size is being used check to make sure there are dot markings around the nozzle.

4--0.40mm

0--0.60mm

1--0.80mm

2--1.00mm

3--1.20mm

Example of nozzle mark

7 Install drive gear-hobb assembly

Install the large drive gear [PP-FP0154]. Make sure the faces of the two gears are flush with each other. Adjust the pinion gear as necessary. If adjustments are required, make sure to re-torque the pinon gear set screw.

Ready
Installed

8 Install idler and spring assembly

Install the idler [PP-FP0135] and the idler spring assembly [HD-NT0011], [HD-MS0430], and [HD-BT0197].

Ready
Installed

9 Install filament guide path

Install the filament guide path [PP-FP0136] as shown.

Ready
Installed (in green)

10 Install zero sense line, fan duct, and heatsink assembly

Install the heatsink assembly [AS-HE0033] onto the Extruder Body as shown.

Route the heater cartridge wires and the thermistor wires as shown.

Slide the blower shroud [PP-IS0069] over the hotend.

Put the zero sense line [AS-CB0063] onto one of the M3x35 SHCS [HD-BT0043], then put it into the lower right mounting hole as shown.

Put in the other two M3x35 SHCS [HD-BT0043] into the top two mounting holes, and put the M3x30 SHCS [HD-BT0042] into the lower left mounting hole.

Make sure not to pinch the zero sense line.

Torque the fasteners to 3 in * lbs in the sequence shown in the photo.

Route the Hotend Ground wire as pictured.

Materials
Installed
Routing
Materials
Install Blower Shroud
Zero sense line
Routing
Torque sequence

11 Install Blower Fan

Using one M3 x 20 BHCS [HD-BT0171] with a washer [HD-WA0038], install the blower fan [AS-CB0062] as shown.

Route the wires around back by the motor connector.

Materials
Installed

12 Apply Warning Sticker

Apply 1x- 0.25mm "Hot" Warning Sticker [DC-LB0164] to the part cooling fan, exactly as pictured.

Materials
Installed

13 Install Heatsink Fan

Using four M3 x 12 SHCS [HD-BT0039]. install heatsink fan [AS-CB0064] as shown.

Materials
Installed

14 Connect motor and thermistor harness

Connect motor harness [AS-CB0061] and thermistor extension harness [AS-CB0066] as pictured

Materials
Thermistor installed
Motor harness installed

15 Pin all harnesses to the connector

Pin the wiring harness according to the drawing. AS-CB0085 Pin Assignments

Pinout

16 Wrap the hotend ground wire and pin then label

While pinning the hotend ground wire last, wrap around the bundle of wires once or twice as pictured before pinning. After the ground pin is set. Place a label on the back of the extruder mount [PP-IS0074] to the right side at a 60 degree angle as shown.

Label applied at 60 degree angle

17 Electrical test

After assembly of the HS+ Tool Head is complete, it is necessary to verify the electrical properties of the toolhead, namely the heater cartridge and thermistor.

Refer to the pin-out diagram above for pin locations

First we will test the resistance value of the heater cartridge; To do so, first set your multimeter to Ohms which is signified by the capital Greek letter Omega. Now touch the probes of your multimeter to pins 3 & 13 individually. Note: Positive or negative probe positions are irrelevant to this test. The display on the multimeter should now show a value around 19 Ohms. Any value between 12.8 and 14.4 Ohms is acceptable, values outside of that range are cause for rejection of the heater cartridge and it should be replaced.

Next we will verify that the heater cartridge DOES NOT have continuity to the ground circuit. To do so, the multimeter may remain in Ohms mode or be switched to an audible continuity test mode by moving the switch to the symbol representing sound waves. Now touch one probe to the heater block, and the other to pins 3 and then 13, individually. Note: Positive or negative probe positions are irrelevant to this test. Whether probing pin 3 or 13, the multimeter display should remain at 0 and no audible alarm should sound. This indicates that there is no continuity between either lead of the heater cartridge and the toolheads ground circuit. If the multimeter display reads anything but 0, or an audible alarm is heard during either half of this test, the heater cartridge must be rejected and replaced.

Next we will perform the same tests for the thermistor. To do so, first set your multimeter to Ohms which is signified by the capital Greek letter Omega. Now touch the probes of your multimeter to pins 9 & 19 individually. Note: Positive or negative probe positions are irrelevant to this test. The display on the multimeter should now show a value between 80 and 120 K Ohms. Pay close attention to the units displayed on the multimeter's display; the letter 'K' should be displayed to the right of the value. If a reading is given in Ohms or Mega Ohms (indicated by the letter 'M' to the right of the value displayed) or the kOhms reading is too low (values displayed as 1.xx or similar) or otherwise outside of the range stated above, the thermistor must be rejected and replaced.

Next we will verify that the thermistor DOES NOT have continuity to the ground circuit. To do so, the multimeter may remain in Ohms mode or be switched to an audible continuity test mode by moving the switch to the symbol representing sound waves. Now touch one probe to the heater block, and the other to pins 9 and then 19, individually. Note: Positive or negative probe positions are irrelevant to this test. Whether probing pin 9 or 19, the multimeter display should remain at 0 and no audible alarm should sound. This indicates that there is no continuity between either lead of the thermistor and the toolhead's ground circuit. If the multimeter display reads anything but 0, or an audible alarm is heard during either half of this test, the thermistor must be rejected and replaced.

To finalize this test, verify that the zero sense line (ground circuit) has continuity to the nozzle. This test is best performed in the audible continuity mode. Touch one probe to the nozzle or heater block, and the other to pin 8 on the toolhead's connector. Note: Positive or negative probe positions are irrelevant to this test. An audible alarm should sound indicating that continuity is present. If so, the toolhead has passed electrical testing and may proceed to final extrusion testing. Congratulations!

Multimeter in resistance (Ohms) mode
Multimeter in audible continuity test mode

18 Extrusion test and remove filament from extruder

Put the toolhead onto the test stand and run the test gcode. Make sure:

1) The heatsink fan is on anytime the tool's controller is powered on

2) That the blower fan runs without being too noisy or jittery

3) That the Hotend heats up in a controlled way

4) The stepper motor moves without skipping

Visually verify the extrusion and make sure there is no debris.

Remove the remaining filament from the tool head. Once the tool head is cool, insert a cold piece of filament into the tool head and trim it to approximately 30mm of filament.

19 Gather Materials for Packaging

1x- [AS-PK0010] 90 mm wiper pad set 5 pack
1x- [AS-TH0069] Titan Aero Assembly, HS+ 1.2
1x- [DC-LB0165] HS+ 1.2 Tool Head Label, Front
1x- [DC-LB0166] HS+ 1.2 Tool Head Label, Back
1x- [DC-MS0037] Colorado Made Green Sticker
1x- [DC-MS0054] Firmware Update Warning Cards
1x- [DC-MS0060] CONGRATULATIONS!- Accessory Instruction Card
1x- [PP-GP0398] HS/HS+ Double Wiper Pad Mount
1x- [RM-PE0015] IC3D PETg Sample Pack, 65g
1x- [SH-BX0088] Accessory Tool Head Box: 9-1/2 x 7 x 3-7/8 Die Cut, 32 ECT, B Flute, Kraft, White
1x- [SH-PA0049] Korrvu Medium Retention Pack for Standard Tool Heads
1x- [SH-PG0030] 8X10 2MIL RECLOSABLE BAG
1x- [SH-PG0131] #260 White Reinforced Gummed Tape with LulzBot Printed Logo
1x- [TL-CS0255] Scotch Brite Maroon Pad, 2"X 3"

Gathered Materials

20 Fold box

Take your unfolded box [SH-BX0088] placing so that the fold creases are facing you and start by folding up the flaps on the left side of the box as shown.

Next fold those side in towards the middle, as shown.

Now take the longer flap and fold it over the two side flaps we brought in towards the middle, as shown.

Repeat this process for the right side flaps.

Unfolded Box
Left Inner Side Fold
Left Side Folded
Right Side Folded

21 Place HS+ Tool Head into Korrvu

We will now place the HS+ Tool Head into the Korrvu [SH-PA0049].

First take the Korrvu and fold up the flaps without the finger holes. This will loosen the plastic wrap so we can slide the tool head under it.

Now slide the tool head under the plastic wrap. Make sure when you slide the tool head in, the tool head should be lying on the motor with the heat sink fan facing you.

Next, fold the flaps without the finger holes down. This will tighten the plastic of the Korrvu over the tool head.

Now we can fold the flaps with the finger holes up so we can place the tool head into the box.

Tool head under Plastic Wrap
Tool head Wrapped in Korrvu
Completed Tool Head Packaged in Korrvu

22 Place tool head in box

Place the tool head, inside the Korrvu and place it in the box as shown.

Tool Head in Korrvu, Placed in Box

23 Add Accessories

First bag [TL-CS0255] Scotch Brite Maroon Pad, [PP-GP0398] HS/HS+ Double Wiper Pad Mount, and [AS-PK0010] 90 mm wiper pad set into the [SH-PG0025] 5 x 8" 2 Mil Reclosable Bag, seal close then place on the right side of the box.

Continue to place the [RM-PE0015] IC3D PETg Sample Pack, 65g on top of the toolhead.

Next, place the Congratulations card [DC-MS0060] in the box second. Lastly, add the Firmware Update card [DC-MS0054].

Wiper mount, 5 pack wiper pad, and Scotch Brite Bagged and placed.
Sample filament added, Second.
Congratulations card
Firmware update card

24 Close and tape box

Now close the box and take it to the Uline tape machines.

Use [SH-PG0131] #260 White Reinforced Gummed Tape with LulzBot Printed Logo, 10 Pack.

Select the 12" length on the machine.

Place the tape with slightly more depth on the top of the box.

Now we will fold the sides inward.

Lastly, fold the tape down securing the lid of the box closed.

Close the box.
12" tape length to close.
Fold sides the in first.
Fold last tape flap downward.

25 Add all stickers/labels

First place the Front label [DC-LB0165] to the front of the box. Next place the back label [DC-LB0166] to the back of the box. Lastly, add the [DC-MS0037] Colorado Made Green Sticker to the right side of the box, positioned in the top right corner.

Front Label.
Back label.
Colorado Sticker, Last
Done! Take me home