I solved it. It was a simple low voltage/current issue of Rpi. Now I am powering it via seperate PSU rather than with duet 3. It works flawlessly.
Best posts made by astrn
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RE: Duet 3 cuts power to RPi4 when SSR is latched via PS_ON pin.
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RE: Feature request: Controlling stepper motor with M106
I dont think it is that complicated to implement this, at least for a programmer that knows what he/she is doing. Since it will just convert 0-255 PWM value to move the stepper to between 0-255 mm. Travel distance can be adjusted with simple e-step calibration. Sensorless homing or a simple endstop can be used to determine 0 position as with like other axis using. Instead of adjusting PWM speed it will just use it as a coordinate and transmit that value to stepper driver. What firmware I am using is irrevelant with my request since no RRF cannot do what I am asking already. I have duet 3 with latest RRF3.2.2. It is much more user friendly and I believe there will be tremendous demand since most of the people nowadays looking to cool the print as much fast as possible. Using a simple air compressor is super cheap option as well as beat the berdair not only by price but also performance vise. Only problem is controlling air pressure in real time.