Mosquito Style Hotend Mount for Prusa Mini

A drop-in replacement mount for "Mosquito style" hotends (original and clone) using the bowden (v6/BMG mount) adapter.

Designed from scratch with the goal of a mechanical stable and reliable mount solution. The fan shroud has been integrated into the adapter.

It's designed to work with the standard 40x40x10mm fan (mounted with 2 screws).

Position Offsets

Compared to the stock hotend, the nozzle is moved -4mm in Y direction and 0mm in X direction - this requires a one-time modification of the startcode in cura/slicr to avoid the initial prime line printed outside the plate.

• Don't forget to re-calibrate the first layer and setting z-offset to 0 for calibration!
• Dont' forget to change the PINDA/MINDA position!

gcode - replace the first G1 line (with Y-2) with the following

G1 Y1 X179 F2400

Additionally, set the Extruder1 "Y Nozzle Offset" to -4mm - you can decrease the value in case the initial “filemant purging” line is outside the build plate (it also depends on the mechanical dimensions of the plate!).

PID Tuning

Depending on your used “Mosquito Style” hotend, you have to tweak the PID settings. The following values are used for an aluminum version.

M301 P22.79 I1.79 D72.47 ; TWEAK mosquito PID

Additional parts

• 2x screw M3x20 (left clamp and bottom x-carriage)
• 2x screw M3x25 (bottom fan and top x-carriage)
• 1x screw M3x35 (top fan)
• 5x hex-nuts M3 (mount adapter)
• 1x self-locking hex-nut M3 (top fan screw)

Recommended Modifications/Tweeks)

The stock heater-cartridge and hotend-sensor cables are about 5cm too short to be fixed with the PINDA clamp. But you can run the cables outside of the main cable strain (see photos) - the recommended solution is to use longer cables.

Theoretically the hotend could be mount inverted (hotend block directly under the fan) but i would avoid this because the distance in between is too short and the plastic may melt!

Replacing the stock extruder with a standard BMG version should be considered for most reliable printing (didn't got any stuck filament on 10 printers for years now).

Tests

As of now, i've only tested the adapter with a clone and not the genuine mosquito. The clones have a much higher heat dissipation but the cooling is still working great (you can touch the whole metal frame with your fingers).

Print instructions

For optimal results, use your custom printer settings with the stl file!

Used print settings (gcode+photos)

• Layer height: 0.20mm
• Adapter-Orientation: regular
• Clamp-Orientation: rotated at 180deg for best dimensional accuracy
• Material: BASF Ultrafuse PET (transparent)
• Supports: Adapter(yes, @80deg), Clamp(no)

Suggested print settings

• Layer height: 0.10-0.20mm
• Material: PLA/ABS/ASA/PET/PETG
• Supports: Adapter(yes), Clamp(no)

NOTES

The dimensional accuracy is critical for the snap-fits. Depending on your material, scaling might be necessary! (use negative horizontal expansion in case the clamp or screws are not fitting)