Clockwork 2 / LDO Nitehawk SB cover with 4010 fan mount

The RP2040 chip of the LDO Nitehawk SB toolhead board gets very hot with an enclosed chamber and is also mounted on the back side of the board facing the extruder motor which adds to its heat exposure.  For a 55C+ chamber temperature I was seeing close to or over 85C which is the upper rated temperature of the RP2040.  After installing the fan I was seeing maintained temps on the Nitehawk of 60C (5C over chamber temp).

This build modifies the Clockwork 2 cover that is provided for the Nitehawk for a 4010 fan (since I had many spare 24v 4010 fans). Since there isn't an extra fan mount on the toolhead board you'll need to power and ground it using one of the existing connectors. Make sure you know what you are doing with the wires as you can burn out the RP2040 data pins if you feed a 24v line into one of them. For example, in my case I use a Klicky probe so I had an unused 24v supply and then combined the ground wire of the 24v 4010 fan with one of the leads from the Klicky probe (picture included).

The bolt holes should take an M3x12 bolt (x4) without protruding past the case but you should inspect the bolts to make sure they aren't going to make contact with anything on the Nitehawk board just in case your fan design is different than mine.

Carefully pack everything up when closing up the cover to make sure the fan isn't impeded by any wires or connectors.  Lastly, make sure the fan doesn't make contact with the front right Z belt.  I included a picture of my Voron 2.4 350mm at X:350, Y:0 and it's still a fair distance away but your build might be closer and you'll need to make allowances for that in your slicer to avoid that corner.

Print using standard Voron part settings using a heat tolerant filament like ABS/ASA. Supports may be needed for the fan vent holes but those aren't visible once the fan is mounted so your choice.