AD5X internal circulation air filtration duct with fan speed control

Internal recirculation air filtration duct for AD5X. This model use the same 24V 5015 fan/blower model as the one found on the toolhead with 4 wires. This allows PWM capability and interchangeability. The mod help reduce fumes and particulates that can irritate eyes and nose if you have to sit or work close to the printer. This model was designed to accommodate the stock motherboard fan with ample amount of clearance to other components such as the belts and cables. Link to the blower.

Powering the fan without PWM: while testing, I only use the + and - wires and piggyback the blower to the Motherboard cooling fan using a 2-pin JST Y splitter. Link to the Y splitter. Note that this splitter wires color are reversed of markings on the machine (red comes in - and black comes in +). This doesn't make any problem because you reverse the polarity twice but make sure to check the polarity before turning on. Using this method the fan will turn on during the print. Alternatively, you can also use the LED port to power the fan. The LED turn on by default after the printer boots up and you can turn power on/off using the bulb button in the Flash Maker app or Flash Forge Orca. I think there are ways to control this port more cleverly with Gcode but haven't tried.

For PWM speed control: The stock firmware of the AD5X disable Gcode for control of the 4 wires PLA-Fan port. This port is powered with 24V whenever the printer is on, but the PWM signal is always 0. To enable it, refer to this writeup by VoronKor on Github . According to this, the latest version of Zmod supports Gcode to control the PLA-Fan port. You will need you to install Zmod first. With Zmod installed, the fan can be controlled with Gcode M106 P2 S??, S?? can be S0 to S255 in Console. If you send in the print using Orca Slicer, click Printer Settings>Basic Information>Accessory>Check Auxiliary part cooling fan

Hardware: I use M3x8mm self tapping screws for connecting the parts together and installing the assembly to the AD5X screw holes. To the fan, I use 2 6x32, 15mm long flat head counter sunk screws with nuts, but you can use any screw commonly used for PC case fans for this as well without using nuts.

Thanks Jwidess for the model files of the AD5M ductwork. Thanks Derrick Bournazian for discussion and help with testing/modifications.