Cooling Tower

Used the model from thingiverse, added overhangs on three sides (to see how cooling performs depending on position to the part cooling fan) also added circle and bridge element. Two versions available, one with short and longer overhang.

I've used this to troubleshoot poor overhang performance on Sovol SV08 (the issue was that it was printing too slow, fan speed was not affecting the circle and bridge element)

In order to change the fan speed you need to disable part cooling fan and then insert custom gcode at specific layers. I used OrcaSlicer:

1. to disable the fan I changed following in material Cooling tab:

2. to change fan speed I've added custom gcode on these layers when priniting with 0.2 layer height (on the start of each 10%):

to add custom gcode, you need to slice the model, then on the preview move with the slider to the layer that you want to to add the custom gcode, right click on the “+” and select add custm gcode:

Then on specific layer enter specific gcode (this gcode worked on sv08):

; Gradually decrease part cooling fan speed from 100% to 0%

• M106 S255 ; 100% fan speed
• M106 S230 ; 90% fan speed
• M106 S204 ; 80% fan speed
• M106 S179 ; 70% fan speed
• M106 S153 ; 60% fan speed
• M106 S128 ; 50% fan speed
• M106 S102 ; 40% fan speed
• M106 S77 ; 30% fan speed
• M106 S51 ; 20% fan speed
• M106 S26 ; 10% fan speed
• M106 S0 ; 0% fan speed (off)

Once you enter all custom gcode slice the model again and verify that fan speed changes as it should: