Stage 01: Hotend Assembly

Use two M2.5 x 6mm bolts to fix the servo onto the backplate.

Make sure that the servo shaft is centrally aligned with the backplate.

Insert an M5 x 20mm bolt with a needle bearing and shim.

M5 x 20mm Bolt

Thrust Bearing

Shim

On the other side of the heatsink slide on another thrust bearing.

Begin by preparing the backplate with two M3 x 8mm bolts as shown.

Drop an M5 nut into the back of the Backplate.

Fix the assembly together, making sure that there is no play in the switching motion.

The bolt should be tightened down enough to allow the heatsink to rock, but there shouldn't be any play along the axis of rotation or on the plane of contact.

When tightened firmly to hold the probe the threaded insert on the probe may pop out.

To prevent this from happening, use either a soldering iron or lighter to soften the plastic around the insert.

Then pinch the top and bottom of the mount to prevent the insert from popping out.

Fix the Probe mount onto the metal fan and probe mount as shown.

M3 x 8mm Cap

Fix the Probe and Fan Mount onto the backplate with just one M4 x 6mm bolt.

Fix the Angled Fan Mount to the Backplate with one M3 x 8mm bolt.

Remove the support material from under the angled fan mount before mounting.

On the front of the assembly, use an M4 x 6mm bolt to secure the angled fan mount.

Secure the part cooling fan to the mount with two M4 x 20mm bolts.

Insert the probe here and lightly secure it with an M3 x 8mm bolt.

We'll be adjusting the height of the probe later.

Fix the two 30mm fans to the heatsink:

M3 x 12mm bolt

M3 x 20mm bolt

Take the two heater blocks and fix into them the two heater cartridges as shown.

Fix two thermistors to the blocks. We've shown two high temp. thermistors being installed here, but it is identical for the low temp thermistors too.

Make sure to match the orientation as shown in the photos. The two assemblies should mirror each other.

If you're installing a low temp thermistor, install it on the left hotend.

Fix onto both the heater blocks, the heatbreak.

and the nozzle.

Make sure that the nozzle is tight against the heatbreak, but leave a slight gap between the nozzle and heater block when tightening. The nozzle will need to be tightened again when hot.

Prepare the heatsink by inserting two M3 x 12mm bolts onto each side.

Take the two heater block assemblies from the previous step and push them into the heatsink.

With the heater block assemblies pushed in all the way, tighten the bolts to secure them in place.

Note the orientation in the image. The heater side of the block should be facing forward.

Break the support material away from the fan shroud.

Clip the fan shroud onto the blower fan as shown.

Install the X-Endstop as shown.

Note that the X-Endstop is the one with the longer 2M cable.

M2.5 x 12mm Bolt

M2.5 Nyloc Nut

Lay the DSH assembly onto the platform and arrange the cables as shown

Left Hotend and blower fan cables

Servo and Probe cables

Right Hotend cables

Bring the X-Endstop cable around to the front of the gantry.

Route the probe cable behind the tool carriage.

Push the servo into the hole in the tool carriage along with its cable.

Take the cables from the right hotend and place them over the servo.

Press the DSH assembly onto the tool carriage, make sure that none of the cables are getting pinched.

Tighten the two M3 x 8mm bolts. Do this in alternation in order to allow the hotend to rotate out of the way.

Finally, use two M3 x 8mm bolts to completely secure the DSH to the carraige.

Cable tie together the heater, thermistor and 30mm fan cables from each hotend.

Cable tie the right hotends cables to the backplate also.

Ensure that when parked the highlighted part of the right hotends cables are horizontal.

Connect the servo cable to the servo extension cable as shown.

Use tape to mark, in this case, the right hotend heater cables and thermistor.

Take the hotend heatsink fan cables and use side cutters, scissors, or wire strippers to remove the connectors from their ends.

Strip away the outer sleeving to expose some of the wire.

Wrap the black and red wires together as shown.

Wrap the cables with the braided cable sleeving.

Cable tie the cables to the backplate as shown.

Cable tie the right side hotend cable to the backplate. Route these cables behind the backplate and into the sleeving.

Push the tool carraige to the bottom left of the print area.

Use cable ties to secure the loom to the rear of the top panel.

Feed the loom of cables into the base and secure with a cable tie.

Adjust the ooze shields by bending the metal sleds until they are able to make contact with the tips of both nozzles.

The Hotend covers simply slide in place over the heater blocks.