On 11/4/2011 12:40 PM, gene heskett wrote: > On Friday, November 04, 2011 01:26:34 PM Viesturs Lācis did opine: > > >> Hello, gentlemen! >> >> I am in trouble with that double-spindle wood milling machine. >> It has a tendency to freeze up. >> >> I have been trying to understand, what is wrong, but the symptoms are >> telling that the problem is in the small wood dust, that gets inside >> PC case and everywhere else, because the more machine is working, the >> more errors it produce - let rest for few hours and it is back on >> track. >> >> My proposed solution - put PC and monitor in a totally closed, >> dust-proof case. >> > > My solution to that is to put the machine and motor driver electronics on a > shelf about level with the counter spring pulley, with a lexan shield > between the machine and the electrics. No attempt has been made to seal > the computer case at all. > > I have cut a lot of wood with it, and have not had the machine collect > enough dust to cause any problems. > > For my latest motor driver kit, the housing is built with pretty tight > joints, with a 360 watt psu, a 6" ball bearing 120 volt rotron fan and 4 of > the MM-542 drivers in it. The fan is to distribute the heat to the > housing, which is either 1/8 or 3/16 alu plate. It gets pretty warm after > a couple of hours, so another 6" rotron is sitting on edge on top of the > enclosure blowing air across the top, and 4 hours later the front of the > box is maybe 110F when its 70F in the shop. I'll do better at directing > its air flow when the heat hits next summer. ;) > > >> But then there is a problem - how to cool the inside. >> I was thinking that PC components could be cooled with water, but I do >> not know, what to do with monitor. >> > I have a wide screen 18" LCD, also on the other side of the lexan divider, > and so far, knock on wood, zero problems. I think I vacuumed the outside > once last summer. > > OTOH, I suspect your setup might be getting 20x the use mine is, so you > might want to consider that. I personally lose 3 or 4 keyboards to one of > any other problems, swarf is hell on keyboards. > > >> Could You, please, share Your experience and/or know-how about >> cases/boxes of PCs in industrial machines? >> >> Viesturs >> > My $.0.02. :) > > Cheers, Gene >
Yet another approach is to duct clean pressurized air into the cabinet from some other location and put a vent on the side of the box to allow the air to escape. If you run some 3" dryer duct and feed that with a fan similar to a bathroom fan (cheap ones are less than $20 around here), you can get air 40+ feet from the machine and direct it into the panel. It doesn't take much pressure to keep all of the dust out of the panel. Dave ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
