Enclosure fans not syncronized

Sovol SV08 MAX
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1

All,

I have the SV08 Max with the optional enclosure kit. I’m really enjoying it! I’m kinda new to the 3D printing scene, so please forgive me if this is trivial.

My issue is that the enclosure fans don’t work the way I expect them to. I can set the intake fan in OrcaSlicer in the filament profiles (Auxiliary Part Cooling Fan), but there does not appear to be a way to set the exhaust fan except by manually controlling it during every print (either on the included screen or via the printer interface in OrcaSlicer).

I was wondering if anyone has come up with a way to set them up to run synchronized or set them on a per filament basis, or possibly on an enclosure temperature basis?

Thanks!

2

Yes, that is absolutely possible.

First of all, make sure the fan pins are defined in printer.cfg like so:

[fan_generic fan2] # auxiliary fan
pin: PB0
max_power: 1.0

[fan_generic fan3] # exhaust fan
pin: PE11
max_power: 1.0

alternatively, if you are using the DKEU macros add-on, printer.cfg should look like so:

[fan_generic fan2]
pin: PE11
tachometer_pin: PE13
tachometer_ppr: 1
tachometer_poll_interval: 0.0075
max_power: 1.0

[fan_generic fan3]
pin: PB0
tachometer_pin: PB1
tachometer_ppr: 1
tachometer_poll_interval: 0.0075
max_power: 1.0

in Mainsail you should now see Fan 2 (intake fan) and Fan 3 (exhaust fan) under the Miscellaneous tab, where you can change them manually. (and if you have DKEU, you will also see the tachometer values there).

But for the real magic, control them via Orca Slicer’s Filament Advanced G-code boxes. As an example I set mine to gently exhaust air while printing ASA or ABS, preventing fumes from escaping without significantly cooling the chamber. Then when the print is done, I retract the filament slightly, move the extruder out of the way and run both fans on high for one minute to purge any fumes from the chamber before shutting things down. To do so, my “Filament start G-code” is:

; Filament gcode
SET_FAN_SPEED FAN=fan2 SPEED=.06
SET_FAN_SPEED FAN=fan3 SPEED=0.0

and my “Filament end G-code” is:

; filament end gcode
SET_FAN_SPEED FAN=fan2 SPEED=1
SET_FAN_SPEED FAN=fan3 SPEED=1
G91
G1 E-2 Z0.2 F2400
G90
G0 X5 Y495 F12000
G4 P60000
SET_FAN_SPEED FAN=fan2 SPEED=0.0
SET_FAN_SPEED FAN=fan3 SPEED=0.0

I use similar code with PLA filaments to run both fans @ 35% (ie: SPEED = 0.35) while printing then shut them down after so I can keep the doors closed without any heat build-up. (One of these days I’ll add a chamber thermistor for more precise control but this seems to be a good value for my ambient room temperatures.)

1 Like
3

Okay, that makes sense, thanks. I guess you run different printer profiles in addition to different filament profiles then?

4

I personally stick to one printer profile per printer, but you could have different ones, in particular if you are using different nozzle sizes with the same printer. I do tend to have multiple processes, often associated with a particular filament. I might have one tuned for high speed or one tuned for best finish, etc. depending on what I’m trying to accomplish.

1 Like
5

All,

Turns out I’m just weak in the head, haha. I just realized that there’s an Auxiliary Part Cooling Fan setting, then, just below it in OrcaSlicer there’s an Exhaust Fan setting. I didn’t make the connection in my mind about it before, but that’s how to control my other fan.

Thanks again for your replies!