yes, our printers A10, A10M and probably other Creality/Ender clones are very LOUD. So in this topic I want to bring you efficient ways to silencing it.
I was collect many models and thinks to make fan silencers. Some I was try with no success. Because my knowledge is about acoustics too, I was print muffler too which fullfill all my knowledges about air flow acoustics. Great succes, it really works. Jasmine (staff) was try it too.
Power supply fan ShutUP!
If you want to have quiet PSU fan, here is the right only model, resize it to 170% and use only one bigger screw to fix it: https://www.thingiverse.com/thing:2988448 I know, it is intake muffler, but it work on exhaust side too if it is bigger. This muffler did not have negative impact to the air flow (measured).. Or you can do remix for both screws fixing, but you know, time...
Printed with ABS with my adaptive profile, support from build plate only (I was print in mistake with full support but then it was challenge to remove internal support). For printing profile see here http://www.geeetech.com/forum/viewtopic ... 340#p91340
System unit fan ShutUP!
https://www.thingiverse.com/thing:3419051
UPDATE: I was try to moumnt it now. But it did not fit to my printer. Altrough our printers (author's and my) are from similar date of shipping to EU (about November 2018), it is totally different.
There is no space to thick plastic plate (see cutout) and 24V power cable is too high.
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I was print V3 bottom only because space for bed align screws is really small. Printer A10M shipped from China to EU in November 2018, I did not know how to get version model number.
So here are some tips for remixers, because if you have it printed, you did not want to tinker it again. Yes, I am lazy.
+ add hole for Z axis cables
+ In baseplate "delete" the fan holders totally, fan will be holded on the top fan grill
+ total height of fan grill above top of system box make 11-12mm only
add step-down module holder (for 12V fan). Did not use the Aricraft 360 module, it is bad for this application. Use bigger model with MP1584 chip (search aliexpress for MP1584 module).
Printed with ABS 0,3mm, brim 10mm and support from build plate, no warping with excellent SiC Geeetech glass heated to 110°C. Use Hilbert curve for bottom layer, I did not explain you why, just do it.
Original author use PLA, I did not use it.
Now I have mounted it for some time ago. All flat holders was cutted out, fan is lowered inside as possible. Used DC/DC step-down to lower speed, but still is too high - bed heating is way longer to 110°C than before. So I need lower speed more. It is no good to make air mixtude from fan propellers near bottom of the bed.
Someone could try if this flat cover did not help too - http://www.thingiverse.com/thing:3381480
A10M - Hotend fans ShutUP!
This is the loudest part on the printer. A10M have TWO fans which have different RPMs, so acoustic image is terrible. My LEFT fan turns at much more speeds than right fan (and is warm) and sound is really loud and terrible.
Silencing the right fan with muffler did not have such improvement as PSU silencing due second fan. Because hotend are cooled very good, so we can substantially change RPM difference on both fans.
From info of Geeetech staff, both fans are in parallel, powered from 24V, checked by me. There are one dollar ways to fix this.
One way
Use two step-down modules with MP1584 chip (search aliexpress for MP1584 module). Connect fans to these modules and set up both RPMs to be very close. Remember that left fan could be not much limited in final air flow due Touch holder.
Second way
Use only one step-down module for right fan only. Set RPMS to be far out of mechanical resonances.
I used step-down for LEFT fan (see above), noise is still big, but now I hear stepper motors as loudest. Ordered 3010 24V cheap fans.
Third way
Design a boot for whole hotend with respect to air flow, weight and acoustics
Fourth way
Take off both fans and design a boot with bigger silent fan for whole hotend with respect to air flow, weight and acoustics
Realized the Fifth way, of course
While checking of fans voiltage (24V of course, geetech is not dumb), one fan discovered as super-loud, like from server edition. Turns much more and air flow too. So I decided to slow-down this fan by DC/DC step-down module. Yes, I know, I was used MINI360 which I personally did not reccomend for this due chip limit 23V and some fans did not like it... But there are no space at hotend side (maybe behind hotend at backside, but I solved it in this way).
The loudest part is now.... steppers.
Stepper motors ShutUP!
... in future progress.
Preliminaly motor drivers change for TMC, they are at home now, but still does not have courage to flash the printer firmware.
