On 11/4/2011 2:17 PM, Dave wrote: > 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 > > One more option: A panel air conditioner. Hoffman sells them. I think that Rittal might sell them also. Seal everything up and cool it with with the AC.
I put an EMC2 system in a plant that cuts foam which gives off some very corrosive gases. The machine has been running everyday for a year and a half. The gases are so corrosive that any Stainless Steel less than 316 rusts. 316 just turns dark. Both the computer and the screen are inside the cooled cabinet. Dave ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
