FAT Prusa MINI+ - X Carriage - 5020 Blower

Enhance your Prusa MINI+ with this 5020 fan upgrade. Replace the MINI-x-carriage.stl part for improved layer cooling. 5020 fans mean more airflow thanks to their dual air income. This mod not only eliminates stringing but also handles overhangs above 70 degrees effortlessly.

It has been redesigned to accommodate a fan that is 5mm wider without altering the original geometry of the carriage or the length of the X-axis.

Printing

Like the original part, this one is pre-oriented and pre-supported, and can be printed in any material and color.

Even with this, my personal recommendation is to use a material that can withstand slightly higher temperatures than PLA, such as PETG, ABS, or ASA, since the layer fan nozzle tends to be close to the bed and it's easy to set it to more than 60 degrees (the temperature at which PLA begins to deform).

After printing, remember to remove the supports.
 

Hardware

In addition to the new fan, you'll need some screws and nuts before assembling everything. Many of these can be reused from the original layer fan of your MINI+.

• 1x new 5v 5020 blower fan
• 1x new 25mm m3 screw (to secure the fan)
• 2x original m3 screws (to secure the heatsink)
• 1x original m3 hexagonal nut
• 1x original m3 square nut

Installation:

1. Unscrew the original layer fan and also the 2 screws holding the X Carriage to the heatsink.
    
2. It is very important that you now dismantle the X End and reassemble it rotated 180 degrees, the revision code (R2) should be facing upwards (opposite to what is indicated in the official instructions)*.
   
   
    
3. Now mount the new X Carriage using the same steps with which you dismantled the original, and then follow the wiring instructions to finish.

*The new X Carriage is wider and overlaps partially at the back with the X End. The X End is flatter on the front side, by rotating it 180 degrees we will take advantage of that extra space, and the new X Carriage will no longer collide with the X End.

Wiring

1. Cut the wires of your original fan and solder the wires according to their color, red to red, black to black, and yellow to yellow*. Use heat-shrink tubing or electrical tape to cover the solder joints so they are not exposed.
    
2. Hide the joints in the black mesh along with the rest of the wires.

*Your new fan doesn't require a yellow wire, which is typically used to detect if the fan has stopped. If your new fan lacks a yellow wire, you should disable the Fans check in the printer settings to avoid any issues (this does not disable the check for the hot-end heatsink fan).