cr6-se power supply fan air inlet guide and psu mod by esunayg 3d model
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cr6-se power supply fan air inlet guide and psu mod by esunayg

cr6-se power supply fan air inlet guide and psu mod by esunayg

by Thingiverse
Last crawled date: 3 years ago
Psu fan doesnt suck air from the outside, this way and making some psu improvements on it (explained on sebazz community firmware discord server by me) it gets way better I guess. This is my first ever 3d design :D by the way
İt goes in between psu fan cover and psu case.
Dc explanation:
Guys, after 40-48 hours of testing and modding, I think I have been able to find safest, most silent & aesthetic solution for LRS 350 24 psu mod. During my tests I have seen that its fan is way oversized for this modding.
What I have done previously:
added 2 more mbr20200ct shotkys
isolated ntc's
added 1 more schottky (but it made +24 to ground problem by my mistake :slight_smile: so I removed it)
removed 110/220 switch
removed psu fan mesh
What I made last:
added missing filtering cap .47 x2
added a mov for overvoltage protection
added another filtering cap (I cant prove its affect but since I had it I have put it anyway)
cutted and bended PSU black cover
cutted the fan for directing the air
figured out the fan logic
added a buck regulator to set a minimal psu fan speed (6,45v regulated)
added a diode to regulator not feeding back the fan circuit (they share same ground so put on red cable)
End result and tests:
@240c hotend and 110c bed temp and 23c room temp
under constant 180Watts of average load, fan never kick in for full power (default fan speed regulation). After testing for 30 minutes, full fan speed only kicked in 1-2 minutes and turned off. I didnt give up on its self fan regulation which makes it fail proof, on its own case so can carry the device around without problem. That solves my problems.
In case someone wonders about fan regulation, it actually doesnt regulate fan speed. It is a termistor controlled on off thermostat. But since it has an auxilary fan power output from the transformer (which outputs 5,7 volts on zero load, 12 at full load) which makes it pwm duty cycle dependant speed control. An easy design but it works bad at real life.
Thats all for psu (i hope)
Have a good print!
(all tests have been made in default position of the device (inside of the cr6se case (fan cover is put)))

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