PB Design - Recirculating FilterBox/AirScrubber for Sovol Zero - UPDATED!

20260121 UPDATE_2:

The use of a klipper expander opens up new possibilities. Example: You can now also operate a 2-pin 6025 fan via the expander, so you don't need to use a special 4-pin fan if you choose this option.

Please see:

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20260109 UPDATE_1 (Model, Fan and Configuration Information):

1) PB - Sovol Zero - Carbon Filter Recirculating vFin_Update20260109.stl --> Cable routing optimized for 4-pin

2) 6025 24V 4pin PWM Fan - now in use:

https://de.aliexpress.com/item/1005008213628357.html?pdp_npi=4%40dis%21EUR%21%E2%82%AC%205%2C40%21%E2%82%AC%205%2C24%21%21%216.14%215.96%21%40210384cc17679802931548118e4ef1%2112000044259540673%21sh%21AT%21738244749%21X&spm=a2g0o.store_pc_allItems_or_groupList.new_all_items_2007608036824.1005008213628357&gatewayAdapt=glo2deu

Use spare 4 pin plug K_Fan3 on the original board! See also Sovol github for further information.

https://github.com/Sovol3d/SOVOL-ZERO

black - Ground
red - 24V
yellow - Tacho (rpm)
blue - PWM

3) Setup your printer.cfg:

In this version, the filter now works perfectly for my needs. I use it at 50%, 75%, and 100% for maximum circulation.

Even though the HEPA filter is installed after the axial fan in the design, the circulation is more than sufficient.

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20251214 original UPLOAD:

As there is currently no sufficiently sized HEPA/Carbon recirculation air scrubber for the Zero available, I designed one.

You don't need an other printer to print this. Even the mainbody is designed in a way, so that it can be printed with the Zero.

For the carbon box and lid use height range modifier in slicer. I used 25% honeycomb.

One of the three heat inserts has to be installed in the 6025 fan, to use it as mount for the HEPA extension.

All parts should easily self-align during installation. To hold the fan cable in place during installation, I used a small piece of gaffer tape.

The Zeros board offers a 4pin PWM connector and a 2pin (permanent on) connector for 24V.

Take a look at the photo gallery for instructions. The pictures should be self-explanatory.

Use any sort of higher temp material, at least PETG. I used ABS+.

BOM:

• 2x M3x6 for Sidepanel Mount

• 1x M3x35 (30-40) for HEPA Filter Mount

• 2x M3x35 (35-40) for Fan Mount

• 8x 6x3 Magnets

• 5x M3 Voron Style Heat Inserts

• 1x HEPA Filter (Bento-Box Style = "iLife V5 robot vacuum cleaner" Filter)

• 6025 Fan 24 Volts

• Carbon Pellets

Parts I used:

6025 Fan: (!!OUTDATED!! - see UPDATE above)
https://de.aliexpress.com/item/1005001311076519.html?spm=a2g0o.store_pc_home.promoteRecommendProducts_1023603087.1005001311076519&gatewayAdapt=glo2deu

HEPA Filter:
https://de.aliexpress.com/item/4001333137700.html?pdp_npi=4%40dis%21EUR%21%E2%82%AC%206%2C27%21%E2%82%AC%206%2C27%21%21%2150.64%2150.64%21%40211b813f17656501277111213eef4e%2110000015723715590%21sh%21AT%21738244749%21X&spm=a2g0o.store_pc_allItems_or_groupList.new_all_items_2007550574343.4001333137700&gatewayAdapt=glo2deu

If you like my design, feel free to like, comment or add a make :)

Happy printing!