MrMik
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December 06, 2022, 10:44:49 PM |
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The 200mm Noctua NF-P20 PWM running at full speed is the best fan I have found to add quiet cooling. https://noctua.at/en/products/fanI managed to print a single piece fan shroud from polycarbonate (PC) - which means that I can most likely also print it from fire retardant PC once I get some. The fan shroud is tied to the Apollo fan grill and the 200mm Noctua fan is powered using the fan connector on the Apollo. By using the Y-adapter that comes with the Noctua 200mm fan (and cutting the third cable on the Y-connector arm with 3 cables), the stock fan can continue to run with variable speed, while the Noctua 200mm fan runs at full speed all the time. Once I get some of the 6-pin power connectors, I will splice the power cables so that the auxiliary 200mm fan gets powered by the main 12V power of the PSU (for extra redundancy). ![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.ibb.co%2FG9BKLgY%2F200mm-side-09-02.png&t=663&c=1Fuocv5hf8acVQ) Inserting and tightening the cable ties is tricky, but doable. ![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.ibb.co%2FCJNSXsG%2F200mm-tied-08-13.png&t=663&c=igOX_j6mxg_fjw) The Noctua 200mm fan keeps the ASIC temp at 58degC in 27C air temperature, with the stock fan running at 3030rpm. ![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.ibb.co%2F3R9vS91%2F200mm-Noctua-09-55.png&t=663&c=6Bk5UYFiK3pGmw) ![](https://ip.bitcointalk.org/?u=https%3A%2F%2Fi.ibb.co%2FK6JCGRb%2F200mm-Open-Scad-21-56.png&t=663&c=Kcf_--j4WNNuOQ) Here is the OpenScad code if someone wants to play with it (it's probably full of non-manifolds and other esoteric critters, but PrusaSlicer renders the resulting STL file without problems) : $fn=200; _min = 0.01; // translate([-_min,0,0])
difference(){// sectioning 200mm standalone fan shroud
union(){// 200mm Noctua stand-alone Fan Shroud
difference(){// Power Supply Fan Shroud Hull to be hollowed by 2nd hull
hull(){// Outer hull // total height is supposed to be 50mm translate([0,0,0])
difference(){// shape of Polli top opening inner dimensions; differencing a ring from a cube cube([88, 88, 1], center=true);// square hole
translate([0,0,-50]) difference(){// making ring to be differenced cylinder(r=120,h=200);
cylinder(r=52.25, h=200); } // End difference to make ring
} // End difference
translate([0,0,-50]) cylinder(r=98.5, h=1);
} // End outer hull
hull(){// Inner hull // total height is supposed to be 50mm
translate([0,0,-0.5]) difference(){// shape of Polli top opening inner dimensions; differencing a ring from a cube cube([86.4, 86.4, 1], center=true);// square hole
translate([0,0,-50]) difference(){// making ring to be differenced cylinder(r=120,h=200);
cylinder(r=51.25, h=200); } // End difference to make ring
} // End difference
translate([0,0,-50]) cylinder(r=97.5, h=1);// opening for 200mm Noctua fan
} // End inner hull
difference(){// opening the bottom hole again: shape of Polli top opening inner dimensions; differencing a ring from a cube cube([86.4, 86.4, 10.5], center=true);// square hole
translate([0,0,-50]) difference(){// making ring to be differenced cylinder(r=120,h=200);
cylinder(r=51.25, h=200); } // End difference to make ring
} // End difference
} // End difference of hull to be hollowed
translate([0,0,3.5]) difference(){// part that enters Polli opening
difference(){// shape of Polli top opening dimensions; differencing a ring from a cube cube([88, 88, 6.5], center=true);// square hole
translate([0,0,-55]) difference(){// making ring to be differenced cylinder(r=120,h=200);
cylinder(r=52.25, h=200); } // End difference to make ring
} // End difference
difference(){// shape of Polli top opening inner dimensions; differencing a ring from a cube cube([86.4, 86.4, 6.5], center=true);// square hole
translate([0,0,-50]) difference(){// making ring to be differenced cylinder(r=120,h=200);
cylinder(r=51.25, h=200); } // End difference to make ring
} // End difference
} // End of part that enters Polli opening for 1.5mm
translate([0,0,0.5]) difference(){// Fan attachment level top plate // holes distance: 170mm ; 4.5mm diameter
translate([0,0,-50]) cube([200,200,1.0], center=true);// top plate
union(){// 4 x Quarter rings for corner rounding of the top late
// rounding corners by differencing 1/4th rings in each corner translate([89,89,-100])// moving the quarter ring where it needs to be difference(){// a quarter ring cylinder (r=25, h=200);
cylinder (r=11, h=200);
rotate([0,0,45]) cube([15,1500,400],center=true);
translate([-18,0,0]) rotate([0,0,45]) cube([25,1500,400],center=true);
} // End difference of a quarter ring
rotate([0,0,90]) translate([89,89,-100])// moving the quarter ring where it needs to be difference(){// a quarter ring cylinder (r=25, h=200);
cylinder (r=11, h=200);
rotate([0,0,45]) cube([15,1500,400],center=true);
translate([-18,0,0]) rotate([0,0,45]) cube([25,1500,400],center=true);
} // End difference of a quarter ring
rotate([0,0,180]) translate([89,89,-100])// moving the quarter ring where it needs to be difference(){// a quarter ring cylinder (r=25, h=200);
cylinder (r=11, h=200);
rotate([0,0,45]) cube([15,1500,400],center=true);
translate([-18,0,0]) rotate([0,0,45]) cube([25,1500,400],center=true);
} // End difference of a quarter ring
rotate([0,0,270]) translate([89,89,-100])// moving the quarter ring where it needs to be difference(){// a quarter ring cylinder (r=25, h=200);
cylinder (r=11, h=200);
rotate([0,0,45]) cube([15,1500,400],center=true);
translate([-18,0,0]) rotate([0,0,45]) cube([25,1500,400],center=true);
} // End difference of a quarter ring
} // End union 4 x quarter rings for corner rounding
translate([0,0,-55]) cylinder(h=100.02, r=97.5);// Auxiliary fan sized hole 192.5mm diameter
translate([-85,-85,-55]) union(){// Fan screw holes group of 4
translate([0,0,0]) cylinder(h=1000, r=2.35);// increased from r=2.25 in v20221030c
translate([170,0,0]) cylinder(h=1000, r=2.35);
translate([0,170,0]) cylinder(h=1000, r=2.35);
translate([170,170,0]) cylinder(h=1000, r=2.35);
} // End union fan screw holes group of 4
} // End difference fan attachment level top
rotate([0,0,0]) union(){// Cable tie loops set of 2 A
translate([-40.25,-32.25,3.0]) rotate([90,0,-142]) difference(){// hollowing cable tie loop 1 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
translate([-31.25,-41.0,3.0]) rotate([90,0,-127.5]) difference(){// hollowing cable tie loop 2 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
} // End union cable tie loops
rotate([0,0,90]) union(){// Cable tie loops set of 2 B
translate([-40.25,-32.25,3.0]) rotate([90,0,-142]) difference(){// hollowing cable tie loop 1 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
translate([-31.25,-41.0,3.0]) rotate([90,0,-127.5]) difference(){// hollowing cable tie loop 2 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
} // End union cable tie loops
rotate([0,0,180]) union(){// Cable tie loops set of 2 C
translate([-40.25,-32.25,3.0]) rotate([90,0,-142]) difference(){// hollowing cable tie loop 1 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
translate([-31.25,-41.0,3.0]) rotate([90,0,-127.5]) difference(){// hollowing cable tie loop 2 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
} // End union cable tie loops
rotate([0,0,270]) union(){// Cable tie loops set of 2 D
translate([-40.25,-32.25,3.0]) rotate([90,0,-142]) difference(){// hollowing cable tie loop 1 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
translate([-31.25,-41.0,3.0]) rotate([90,0,-127.5]) difference(){// hollowing cable tie loop 2 cylinder(h=3.5,r=3);
cube([3,3,10], center=true);
translate([0,-5,0]) cube([13,13,10], center=false);
} // End difference hollowing cable tie loop
} // End union cable tie loops
} // End 200mm Noctua stand-alone Fan Shroud union
*union(){// sectioning
translate([0,0,-55]) cube([200,200,100],center=true);// sectioning for partial print test
*rotate([0,0,45]) translate([50,50,-50]) cube([100,100,200],center=true);// to section the whole thing
*translate([50,50,-50]) cube([100,100,200],center=true);// to section the whole thing } // End union for sectioning
} // End difference of entire fan shroud assembly for sectioning
Recommended printing material is PolyMax PC-FR (not yet tested, but it prints well with Polymaker PC-Max, which is supposedly similar) https://us.polymaker.com/products/polymax-pc-fr
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