Sovol SV08 CPU fan control via software

[@TechAmbr]

I'm setting my SV08 up this weekend, but I already have the Noctua fan. Still, this is the perfect solution for someone who just wants some peace and quiet when the machine is idle. Thank you for posting it!

[@jazzitsw6875]

Thanks man! I submitted your solution to Sovol so they can add it to the stock firmware. Was driving me crazy. Had my soldering iron already heated up ;-)

[@kampfwuffi]

When will they update the firmware. Last firmware update was in june!

[@TheWuzyy]

You sir are the greatest hero in 3d printing history!

[@IamMrDisaster]

I read a review where someone said the fan was quieter. Not on mine. Driving me insane. Thank you.

[@JohnHansknecht]

I saw that I was mentioned by Gergo on his Gergo print 3D channel. One thing he got wrong.. it isn't my idea or my code! I'm just making it public! See my comments on the video!

[@cyrushalfacre9368]

Its also worth swapping the fan out for a decent fan like a noctua or similar, so even when it does ramp up its a LOT quieter. Also creating a definition for the correct fan if youre going to add the enclosure at any point.

[@JoesComputerMuseum]

Absolute magic, sir. Thanks!

[@MrRossi1805]

I added it as well to /home/sovol/patch/printer.cfg In case I do a reset, this function wont get lost. Thank you so much! Stupid thing, I already bought an electronic fan controller with external temp. probe 😖

[@MythSammich]

This worked perfectly. Thanks so much!

[@Snot_telling]

thankyou so much, my printer sounds so much better now. so much easier, and totally non-destructive compared to all the other fan mods for this printer I have seen on the internet. I have adjusted the settings a lil; target_temp being set to 36c (winter here at the moment, and this was around the lower end temps that I found the fan made some difference while at idle) min_speed: 0.05. (at 5% the fan sound was less of an odd sound than at 10%) totally worth a thumbs up an a subscribe!

[@lyndonfoster1090]

Wonderful and super useful. I hope sovol updates the new versions. Thank you for posting

[@reprinted3D]

Thank you for this; it's really helped. Eventually I'm going to install the new Noctua 24v fan to help with the noise when the fan does kick on, but for now, it's much better.

[@Traqr]

If you're not opposed to some cutting, print a nice fan cover (I liked thing:4288719) & cut the grill out of the bottom panel. I held the cover in place with the fan bolts run in from the bottom of the nutserts & hot-glued the new cover on (just by the corners to allow air in under the edges), then reinstalled everything. Drastically reduces backpressure so the stock fan never gets particularly loud and 50C usually stabilizes at about 30% speed. Non-reversible but doesn't require buying stuff. FYI it took me a few hours of shopping locally & online for cheap 40mm wire grills before it occurred to me "hey, I have a 3D printer now!" 🙄

[@smusi1564]

Got the same idea but idk how to change the fan

[@kpgeary]

Just FYI, the fan3 definition is for the enclosure exhaust fan (included with the enclosure kit), not the controller bay fan. Better to create a new fan definition for your mod instead of changing the fan3 definition, so people won't run into problems when they install the enclosure kit.

[@JohnHansknecht]

@kpgeary I see what you mean, but I can't remake the video. I only presented code I found in a forum. I'm sure SOVOL will be doing an official update soon.

[@triXsolarflare]

is it just a case of renaming his code to say fan 4? and leaving fan 3 alone? *update, that is what I did and it seemed to work, new to the klipper thingy lol - can you use this same code for the case enclosure fan? "fan3" as it seems it is set to 100%

[@G4m3Junkie]

@@triXsolarflare I Think The fanx is only to name it. The pin: is where the magic goes. Also no clue about Klipper but i think makes not to much diffrent to other Programming things.

[@kampfwuffi]

There is a bad PWM-sound, when the fan is spinning under 10% speed. It's better to shut off the fan when it is spinning under e.g. 20% Here is the updated code with the tweak to avoid fan spinning useless unter 20% speed and making pwm noises (works with original fan, might not with other fan. Use at own risk and test if the fan spins up again after shutting down): [temperature_fan CPUfan] pin: PA1 kick_start_time: 0.5 max_power: 1.0 min_temp: 0 max_temp: 90 hardware_pwm: true target_temp: 57 sensor_type: temperature_host max_speed: 1.0 min_speed: 0.23 off_below: 0.25 control: pid pid_Kp: 2 pid_Ki: .5 pid_Kd: 0.25 pid_deriv_time: 5.0

[@cowboy124aa3]

Awesome, So much better than listening to that fan even from my bedroom two rooms away...lol Thank you! Now if you could write code to put my printer into sleep mode, when I'm not using it like my Airfrier and a few other things, I would be eternally grateful..lol

[@creativecityis]

What a legend

[@ppekala]

Thanks, very useful.

[@raymondcuda5906]

Well done!!

[@adriannorgate9577]

If you were to purchase the Noctua NF-A4x10 24v fan and plug it in to the exact same spot the current 4010 fan is, would you still use this script "as written" or could/would you lower the target temp of 60 to something lower? (because of the much quieter Noctua fan). Or would you just leave the original printer.cfg file alone on the stock Sovol SV08 with the Noctua fan installed?

[@troyc3]

Thank you, Im new to printing in fact my SVO8 arrived today, just about ready to open the box and assembly it. What software did you use to edit the config, are you ssh into the printer or remote desktop into the printer?

[@JohnHansknecht]

You can bring up the printer and its configuration in Orcaslicer. This is also where you see live camera image and all temperatures.

[@NoMercyFtw]

Noice i knew the fan didnt need to be replaced, people buying ish they dont need to cuz of some youtuber said so

[@onkelwernerswerkstatt]

thank you verry much 👍👍👍

[@laurentmehlen7781]

I inserted the rows in the desciption in the printer.cfg an restarted the firmwarer, than I started a print and got a error : The value "fan3" is not a valid FAN And the print was canceled

[@JohnHansknecht]

@@laurentmehlen7781 Below the section of code about fan three, not in the middle of it, add this: [temperature_fan CPUfan] pin: PA1 kick_start_time: 0.5 max_power: 1.0 min_temp: 0 max_temp: 90 hardware_pwm: true target_temp: 60 sensor_type: temperature_host max_speed: 1.0 min_speed: 0 control: pid pid_Kp: 2 pid_Ki: .5 pid_Kd: 0.25 pid_deriv_time: 5.0

[@DonBarthel]

Please, where is the temperature measured from and which line in the definition connects to that temperature sensor?

[@JohnHansknecht]

The line that says "sensor_type: temperature_host". Host is a chip on the pc board. It actually runs hotter than the CPU, so that is the most important item to keep cool.

[@bradleyliebl2931]

Weird yours is set to min speed 0 but is running 10 percent?

[@marclefevre1045]

I find that when the fan speed is set to anything less than 100%, it's off and only on when the speed is 100%. I'm making this mod after changing out the fan to a Noctua 40mm PWM fan. Since the fan connection is only 2 pin, the PWM-ing is being done on the supply voltage to the fan and not the PWM control pin. Do you happen to know if fans with PWM control inputs don't do well with PWM-ed power?

[@JohnHansknecht]

@@marclefevre1045 mod was intended for stock machine. All bets are off for other fan mods. There is no pwm pin on the output. Just power and ground that get pulsed to mimic pwm.

[@MoeOuan666]

It works with any 24v DC 2-wire fan (0.1A), like the stock one. Should work with more than 0.1A but not sure how many amps fan connector are able to deliver. Anyway, 24v 0.1A fans are super common: Replaced the 40mm stock one by a 80mm one (8010 meaning 80mm diameter, 10mm thickness. you do not want thicker than stock (4010) else it will not fit). Much quieter, then put it on PWM following this guide. Wow, now I do not have the urge to power off asap, it's the opposite, I struggle not forgetting to turn off the SV08 when done printing :-)

[@bartsimpson7399]

Does not work for me with noctua 24V pwm. It is only a two point controller (on-off) so no linear ramp.

[@JohnHansknecht]

@@bartsimpson7399 the stock fan works well. It is significantly quieter if you cut away the metal grid over the fan entry.

[@bartsimpson7399]

@@JohnHansknecht I put the old fan back in and it works but it makes a strange noise on low pwm levels.

[@SebastianKottke]

thanks for the great little code