Bambu Lab A1 A1Mini Extruder Cooling System

This model is a click-on cooling system for the A1 A1mini extruder.

The model is inspired by the snap-on design of the following link, thanks to author NGYX.

A1/A1mini Extruder Cooling Mount (A1/A1mini Extruder Cooling Mount) from NGYX - MakerWorld

Of course, if you find it troublesome, you can click on the link below to purchase the finished product directly. Thank you for your support.

Bilibili Workshop (bilibili.com)

This cooling system utilizes a 40-degree Celsius KSD9700 quick-reset switch, enabling automatic fan activation when the extruder reaches 45 degrees Celsius and automatic deactivation below 40 degrees Celsius. It addresses the issue with standard KSD9700 temperature control switches where fans might not turn on or off properly. This is due to the significant difference between the working temperature and reset temperature of standard KSD9700 temperature control switches, such as the 40/45/50/55-degree Celsius versions, which have a reset temperature of 25 degrees Celsius. In current ambient temperatures, the fan cannot be turned off. Therefore, this cooling system employs a quick-reset version, with a reset temperature only 5 degrees Celsius lower than the working temperature, essentially fulfilling daily usage requirements.

The X and Y axis stepper motor cooling is currently under testing, and will be available for serial use with this system in the future. Stay tuned.

Prints are recommended using PLA or PETG, with the following printing parameters:

Layer height: 0.2

Walls: 4 layers

Top: 4 layers

Bottom: 4 layers

Infill: 10%

This system requires the following accessories, with purchase links provided in the BOM table.

5V 9000 RPM 4010 fan 1

M3*10 cup head screw 4

45-degree KSD9700 quick-reset normally open temperature control switch 1

1.5 meter USB power cable 1

Cable ties, heat shrink tubing 1 set

Functional description:

Uses external power supply, does not affect printer operation.

Snap-on installation without damaging the printer, does not affect printer functionality or warranty.

Extruder motor temperature exceeds 45 degrees Celsius, fan automatically turns on.

Extruder motor temperature falls below 40 degrees Celsius, fan automatically turns off.