On 11/4/2011 9:17 PM, Dave wrote: > 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
Hey, if they are milling that particle board... what are they using for a binder in that stuff now?? They used to use some type of formaldehyde binder but I think they got rid of that due to off gassing making people sick.. Are you seeing any signs of corrosion on the PC?? Are the machines frames and bolts corroding at all? On the PC, look at things like the Ethernet connector shell and the USB ports - the shiny plated metal will start to dull if you have a corrosion problem. 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
