A Fume Extractor / Air Purifier for LaserPecker 4

Living in a small apartment with poor ventilation and the expensive commercial alternatives, I set out to design and build a cheap and equally good fume extractor for my LaserPecker 4 and dedicate it to the community in hope that it would save lungs.

I've put a good few weeks of work into this and have gone through several iterations trying different filters. One of my requirements was a round body so I was looking for round filters and in a small enough form factor. Ultimately I stumbled upon the idea of using face mask filters! They are inexpensive, very well documented and tested and easy to find/replace. I've used the world class Swedish brand Sundström.

DISCLAIMER: I'm neither a toxicologist nor a chemist and I have no access to the required equipment to truly measure and analyze the efficiency of the device. I have however seen a significant reduction in the odors and smoke produced when lasering while the device is on. Do your own reasearch, read the filter datasheets and use it at your own risk. If you have access to lab equipment to analyze the air quality, please do share your results and I'll add them here.

Preview:

See it in action here: https://youtu.be/yPNakuKe-hk

Components:

1. Motor: SURPASS HOBBY Brushless DC Motor C2822 (2204) 1400KV + Propeller Adapter

• www.aliexpress.com

1. Speed Control: DC 12V 30A Brushless ESC + AZDelivery Servo Tester CCPM

• Both: www.aliexpress.com
• CCPM: www.amazon.se
• ESC: www.amazon.se

1. Power Supply: 156W Power Supply 12V 13A 5.5*2.5mm

• www.amazon.se

1. Power Jack: 5.5 x 2.5mm DC Power Jack Female

• amazon.se

1. Pre-Filter:

• SR 221 Pre-filter

1. Filter: I've personally tested the SR-297 which should filter the gases and odors but the SR-299-2 is probably a better option as it also filters particles but is slightly larger and more expensive.

• SR 299-2 Combination filter ABEK1-Hg-P3 R (datasheet)
• SR 297 Gas filter ABEK1 (datasheet)

1. Sealing: In order to seal the air gap between the filter and the body, a rubber or silicon ring with an approximate height of 2mm is needed. I've used a Troll Factory Silicon Rubber Type 35 and the provided rubber-mold.STL to form such a ring but it's definitely not the only way.

• TFC Silikon Kautschuk Typ 35

1. M3 x 20 Slotted Cheese Head Screw: 4
2. M4 x 25 Slotted Cheese Head Screw: 4
3. M3 Hex Nut: 4
4. M4 Hex Nut: 4
5. M5 Hex Nut: 1
6. M2 x 6 Self Tapping Screw: 2

Useful?

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