OHAI: Open Hardware Assembly Instructions

1 Gather Materials

1x [AS-CB0208] Asteroid Wire Harness
1x [DC-LB0154] Caution Hot Sticker
2x [DC-LB0160] Tool Head Serial Number Sticker, Matte Silver, 1" x 0.5", Thermal
1x [EL-TH0012] E3D Cartridge Style Thermistor w/ Molex Connector
2x [HD-BT0005] M3 x 10 Bolt, SHCS Black-Oxide
2x [HD-BT0039] Metric Class 12.9 SHCS Alloy Steel, M3 x 12mm Length, 0.50mm Pitch
3x [HD-BT0137] M3 x 8 Bolt, BHCS, Black Oxide
1x [HD-BT0171] Class 10.9 Black-Oxide Steel BHCS M3 x 20mm Length, .5mm Pitch
1x [HD-MS0105] Feed guide collar for 2.85 LGX
2x [HD-MS0588] 4" Black Standard Cable Tie Nylon PA66 18lb T18R0C Bag 100
1x [HD-MS0601] Hot Block Hardware, Magnum +
6x [HD-WA0038] Black-Oxide 18-8 Steel Flat Washer, M3 Screw Size, 3.2mm ID, 7.0mm OD
1x [PP-MP0336] LGX Extruder, 2.85mm, LGX PRO Lulzbot Edition
1x [PP-MP0340] Mosquito Heat Break, 2.85mm, Conduction
1x [PP-MP0350] ACE Magnum + Cold Block & Heatsink, 2.85mm
1x [PP-MP0351] Hot Block, Magnum +
1x [PP-MP0353] Convection Shield
1x [PP-MP0501] Slice, GammaMaster Nozzle - 1.75mm x 1.2mm
1x [PP-GP0731] Asteroid mount
1x [PP-GP0732] Asteroid Fan Duct

Materials needed

2 Hot Block Assembly

2A Thread Heat Break
Remove the copper part and spring from [PP‑MP0340].
Thread the heat break into [PP‑MP0351] and place into red jig block.
Use a 9 mm socket on a torque wrench set to 3.98 Nm, and torque the heat break into the hot block. Ensure the socket is fully seated.

2B Install Posts
Insert 4× posts from [HD‑MS0601] into hot block corners.

2C Wire Preparation
Remove braiding from [AS‑CB0208] harness. Untwist and separate wires cleanly.

2D Secure Ground Wire
Using 1× screw #1 from [HD‑MS0601], secure the ground wire as shown.
Position wire close but not touching post; leave hole near heat break free.

2E Heater Cartridges & Thermistor
Insert heater cartridges and secure each with 1× screw #1 from [HD‑MS0601]. Confirm insulation is not pinched.
Insert [EL‑TH0012] thermistor into designated hole; secure with 1× screw #1.

2F Reattach Spring & Copper Part
Reinstall previously removed spring and copper part onto assembled heat break.

2G Mount to Cold Block
Grab 2× screws #2 + washers from [HD‑MS0601]; washers’ convex face toward screw head.
Align [PP‑MP0350] over posts and heat break, press in place, and insert screws.
Torque screws fully to secure hot block to cold block.

2H Final Hot Block Fasteners
Secure 1× screw #1 on the thermistor side of nozzle block.
Attach [HD‑MS0105] to end of heat break.

Disassembled and inserted into jig

Heat break installed

Posts installed

Cable braid removed from harness

Sense wire secured

Heater cores installed

Thermistor installed

Install spring and copper part

Washers installed on screws

Screws inserted to secure to heatsink

Torque set to 3.98 nm

Torque to spec

Secure screw to thermistor side

Collar installed

3 Motor Assembly

3A Remove LGX Block & Install Hot Block
Remove 2× screws from [PP‑MP0336] to release the LGX block—set aside.
Using same screws, install the completed Hot Block Assembly onto [PP‑MP0336].

3B Install Nozzle
Install [PP‑MP0501] nozzle into [PP‑MP0351], using the nozzle torque tool.

3C Mount Plate Installation
Collect [PP‑GP0731], 2× HD‑BT0039 screws, 2× HD‑WA0038 washers.
Secure plate to [PP‑MP0336] using screws and washers as shown.

3D Fan Installation & Routing
Route square blower fan wires from [AS‑CB0208] through channel in [PP‑GP0731]; confirm fully seated.
Attach fan to [PP‑MP0350] using 2× HD‑BT0005 screws.
Manage blower wire alongside motor wiring, then connect motor wires to motor.

3E Shroud Attachment
Collect [PP‑GP0732], 3× HD‑BT0137 screws, 3× HD‑WA0038 washers.
Attach shroud first to [PP‑GP0731] using 1× screw + washer, then to [PP‑MP0336] using remaining two screw+washer.
Insert blower fan into shroud; secure using 1× HD‑BT0171 screw and HD‑WA0038 washer.

Remove screws and LGX block