Small rigid router - Design advise needed

[Lee Roberts]

I think the thing going amis here guys is the difference in cooling vs contamination free.

So, what you should have is a negatively pressurised enclosure but also have filters on the intake to stop contamination.

Cleaning a filter would typically be less evolved than cleaning a populated enclosure.

Like Eddy says, do what you want but put "safety" as close to the top of the priority list as you care for, heat control is one of the higher items on my safety check list ;-)

.Me

[Boyan Silyavski]

Something like this is perfectly enough http://www.hobbyking.com/hobbyking/s..._Gas_Car_.html
Most of these filters filters if they are a good brand, could filter up to 5 microns with excellent flow.



Definitely the enclosure has to be airtight apart from the filter , i thought that was clear, who wants to spend time cleaning enclosures. And a good thing to note is that when cleaning filter enclosure with a compressor, we Must be sure the air is dry. Spitting water drops on a couple of hundreds euro BOB could hurt.

But as i see it, there is not a law or something. I would say - negative pressure if all is in straight line and easy to cool. Intake ventilators to help the airflow if necessary, especially when there are some obstructions, otherwise-not. Hot things, air out- up in the enclosure, intake from bottom. All in straight line without obstruction if possible.

I would say also - forget 12v PC fans and similar. 220V - ~20-30w ventilator or 2. One all time, second when necessary. Little OTT here will not hurt.

[mitchejc]

Something like this is perfectly enough... Little OTT here will not hurt.

Thx, these type of filters are a good plan. I think you are right about the 12V PC fans, they are weak and I'll go for a bigger 220v fan or two. I'm not sure I'll be able get my box 100% air tight where the wires come in etc so it might be better for me to put my big fans on the bottom (cooling air input side) with filters to try and get a bit of positive pressure then I don't have to worry about small aluminium chips getting into my box.