NEJE A40640 air assst and 40mm fan mount (Petsfang)

thingiverse

Whole set to install NEJE A40640 laser on 40mm fan and have air assist. Contain also holder for test module board from NEJE. Good to keep that one for safety (require unlock after every power on, have test option (you can set power manually and show temperature of module) Module use 40mm faan mounting bracket. Is easy to install and unistall. Laser is in centre of blowing air. It's blinded on model, but just turn laser after assembly for a while and let him create light patch exactly where needed. I use some 304L M3 screws, also M3 screws on fan was replaced (where control board is isntalled). If you need info of exact lengths I can update description (please write in comments). In attached files also calibration cube (for 22 and 30mm distance). WARNING: NEJE module need PWM signal 3..12V amplitude with common ground. I have Ender3 with MKS GEN L board and want use blower signal. To do that I need to use optocoupler and two resistors. I made it on universal board and prepare place for it in holer. See wiring in attached drawings. It is based on TLP421 optocoupler but It may be use any equivalent.