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jay913

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  1.    Ryland Craze reacted to a post in a topic: Homemade Air Purifier
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  10. jay913
    Captain Al: I just put it on my bench, pulling the dust away from me. Generally I switch it on no matter why I do, sanding, working with CA glue and epoxy, soldering. when sanding, I always turn the voltage up to 12v to increase the air flow in order to filter as many air bound particles as possible. Normally, I keep my purifier runs @ 7- 9v , less air flow and a bit quieter. Mike Y: brushless PC cooling fan is very quiet. but when the air is pulling through the filter, that is going to generate some wind noise. My Purifier's Noise level @12v : (65-70 dB) brushless Fan without filters : ( 55-60 dB)
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  13. jay913
    3 filtration layer, (pre-filter->HEPA Filter->activated carbon filter), I m using 2 used DC 12v PC fan to pull the air. decrease the voltage to control the air flow. A Very simple design, quite easy to build. The only disadvantage is the filter aren't re-useable.
  14. jay913
    In my opinion, this is the most important tool on my bench. https://youtu.be/T0WAnV_R8X0
  15.    jay913 reacted to a post in a topic: DIY Pull Saw Miter Box
  16. jay913
    Bob, my 4hp treadmill use pwm to control the speed. yours should have something similar. hope this can help you understand more about treadmill motor and pwm https://www.instructables.com/id/Use-a-Treadmill-DC-Drive-Motor-and-PWM-Speed-Contr/ Jaager, thanks for you information, but my spindle sander is not design for normal size woodworking project, just for model making or small project. my biggest drum is 1 3/8" wide, never had motor over heat problem before, but I will put an thermometer in it to track the temperature inside
  17. jay913
    Will you consider using PCB drill bit. size from 0.1 - 3.0 mm I purchase 2 set from ebay
  18. jay913
    I use a PWM module to control the speed of the motor. 3:56 300-3100 rmp.
  19. jay913
    A homemade machine for ship modelling. https://youtu.be/7H2AdnW_CJ4

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