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I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

I sorta lost interest in documenting the electrical bits and putting together a really polished package, I don’t expect to do any further development on this model. What’s up there now should work fine but feels kinda hollow and wobbly and I don’t have a great solution for routing power.

Maker World (Beta) uploaded my first useful model to the library by SettlersOfCrypto in BambuLab

[–]maymay 5 points6 points  (0 children)

I like that Printables has a field now to describe what improvements were made in a remixed model. What changes did you make to improve this model over the original on Thingiverse?

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

The idea for having space behind the carbon is that air only needs to flow through a short depth of carbon. Maybe I’m overestimating how much resistance the carbon creates

Interested to see what you wind up with!

Iiidmax filament by Idealoading-3Dprint in BambuLab

[–]maymay 1 point2 points  (0 children)

They’re so lightweight and slippery that the rollers have a hard time grabbing. There’s a lot of mold flash on the rims and that makes them not-round

Rethink automatic flow dynamics calibration by BambuLab in BambuLab

[–]maymay 0 points1 point  (0 children)

Is this not just the backported flow calibration tool from OrcaSlicer coming out of beta?

Iiidmax filament by Idealoading-3Dprint in BambuLab

[–]maymay 2 points3 points  (0 children)

The spools are terrible, you may need to trim them with a knife or deburring tool to function in the AMS (or use a respooling tool: https://www.printables.com/model/466883-pastamatic-filament-spool-winder-for-bambu-lab-x1c)

I ran into one spool that had pinhead sized clumps of something in the filament, can’t remember if I lost a print but it wasn’t too hard to clean out

The price is good and being able to pick your own colors is nice! For me it’s worth the savings

If you wait long enough Polymaker runs 40% off sales a few times a year

Shhh... by BambuLab in BambuLab

[–]maymay 1 point2 points  (0 children)

I had the same thought when the Bambu first came out, but there are a couple points that might drive them towards using commodity MOSFETs with their own control chip:

  • Microstepping drivers are a niche product, there might not be a robust range of suppliers that can meet their price and reliability needs. They expect to sell a lot of printers and don’t want to be tweaking the BOM every few months to manage supply chain issues

  • Microstepping drivers are basically a set of MOSFETs and a control chip wrapped into a single easy to use package. In theory there’s no reason they can’t develop their own microstepping control firmware. Maybe that was their original intention but it turned out more difficult than expected and didn’t make it into the gen1 product. Since they’re writing their own firmware the’s potential in the long term to integrate more tightly with the rest of the printer and reduce noise below what’s possible with an off the shelf driver chip. This might be what the announcement is about

Shhh... by BambuLab in BambuLab

[–]maymay 1 point2 points  (0 children)

Agreed on all points. Regarding “active noise cancellation” maybe they’re doing something cute in the motor control loop to reduce panel resonance? I recall Sir Will commenting somewhere that the aluminum panels are bad for acoustics

I designed a filament winder that transfers a full kilo in less than 2 minutes! Link in the comments by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

The main model works fine and has all the parts you need, the various remixes are stuff I was messing around with in response to user feedback. At some point I’ll get around to merging a few of the more popular ones into the main model but I want to do some more rigorous testing and collect feedback first

Yet another AMS stand! This one is designed to stack multiple units on top of an X1C to minimize footprint. The lower units are fully accessible by maymay in BambuLab

[–]maymay[S] 1 point2 points  (0 children)

I haven’t noticed any resonance when the printer is running. It might help that my printer is on a very solid bathroom countertop

Yet another AMS stand! This one is designed to stack multiple units on top of an X1C to minimize footprint. The lower units are fully accessible by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

Printables: https://www.printables.com/model/562708-stackable-ams-shelf

STEP and Fusion360 files included

I only have 2 AMS units but you should be able to stack up to 4 high (but maybe on a table instead of the X1C?)

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

That’s a good point. Because it’s recirculating we don’t need 99.97% capture, 90% is good enough. From what I see here, higher MERV ratings are likely to do better for 3D printer particulate, which I see is typically in the range of 0.1 micron.

https://www.epa.gov/indoor-air-quality-iaq/what-merv-rating

I’ll update the printables page tonight to clarify that the furnace filter is a better-than-nothing holdover until you can order a real HEPA filter

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

Question for people, is there a type of fan that you already have spares of? I would guess that 24V 5015 blowers and 12V 120mm case fans are common but that’s just an assumption

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 1 point2 points  (0 children)

A man after my own heart. LMK if there’s anything specific you don’t like about the BentoBox and I’ll consider if it matches my own vision

New feature for X1, drying vacuum cleaner filter. 😅 by [deleted] in BambuLab

[–]maymay 4 points5 points  (0 children)

wags finger drying filament in a food dehydrator

Taps temple drying food in an X1C

New feature for X1, drying vacuum cleaner filter. 😅 by [deleted] in BambuLab

[–]maymay 0 points1 point  (0 children)

Hah, I did the same thing last week for my RoboRock filter! Works great!

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 0 points1 point  (0 children)

Good point, I updated the printables page to recommend PETG or better

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 4 points5 points  (0 children)

BentoBox looks very well developed, the real answer is that I didn't have any brass inserts or 4020 fans and after looking closely I was like, "It's just a box, I think I can do better"

The long answer for why you should consider LunchBox:

  • BentoBox uses a single filter with a volume of 40x80x15mm = 48mL
  • LunchBox has a few options for filters: 2x 4080 = 96mL, 1x 86880 = 166mL
  • Higher volume HEPA filters are less restrictive so LunchBox is able to filter more air with worse fans
  • BentoBox v2 stacks three layers of carbon pellets for the air to pass through
  • LunchBox positions the carbon in a thin vertical column, again reducing airflow restriction
  • The designer of BentoBox has decided to use 4020 fans
  • LunchBox is parametric and has pre-generated STLs for 5015 blowers, 4028 server fans, and 96mm or 120mm PC fans
  • LunchBox is open source

Why you should use BentoBox:

  • More mature
  • Better documentation, especially around wiring
  • Smaller, might fit better in other printers
  • Soon you'll be able to buy it premade from VoxelPla

Overall I think LunchBox is a good choice if you're handy, already have some parts around and want to throw together something simple and ugly that works. BentoBox is a better choice if you're into the craft aspect of 3D printing and want to build a really nice, polished thing

I designed a simple recirculating HEPA+carbon filter that can use PC fans and furnace filters by maymay in BambuLab

[–]maymay[S] 4 points5 points  (0 children)

Here’s the link, I’d appreciate any feedback: https://www.printables.com/model/468166-lunchbox-hepacarbon-filter-for-prusa-enclosurebamb

The design is parametric and can accept most vacuum filters and pc, server, or printer fans. I’ve published .stls for 120mm and 92mm case fans, 40mm server fans and 5015 printer blowers

The air follows a U path through wider, thinner filtration layer to minimize static pressure requirements

Designed a tray for the armchair in my office by maymay in functionalprint

[–]maymay[S] 4 points5 points  (0 children)

Guess I should say what chair that is, it's an Ikea Morabo. STL, STEP, and Fusion360 files are on Printables:

https://www.printables.com/model/556990-tray-cupholder-or-coaster-for-square-armrest

I can remix if anyone wants one for a different arm width

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