I read in Machine Design, or some other tech mag in one of those device forensics columns about a company that was getting their servo drives back from just one company at a rate of 4 failures a month. The engineer sent to check on it did some checking before he left and found that there was metal particulate matter on the circuit board that shorted it out. When he got to the factory, the machine it was on produced a lot of metal dust and shavings, and their control box had fans, but no filters on it.
At work we have FADAL machining centers, and they have a fan and filter on the outside which blows cool air over a heat sink mounted in the side of the cabinet. on the other side of the heat sink was a fan to circulate the cool clean air from the heat sink to the drives inside the cabinet. With coolant flowing there is still enough airborn debris to clog a 4" by 4" filter in a few weeks. I suggest buying an A/C filter from the big box store, and building a mount for at least a 12" by 12" piece of filter on the input side of your air-stream. On Saturday, July 30, 2011 11:20:01 PM R. van Twisk did opine: > As was my 4 axis xylotex, in a box that exactly fit a pair of ball bearing > psu fans, one in each end, one sucking in and one blowing out the other > end. With 19 volts on those fans, they fairly screamed, so the xylotex was > probably getting 4 or 5x its recommended airflow. And the fans were still > screaming when I heard the pops of the A-3977's blowing their heat sinks > off in response to my tapping the -> arrow key on the keyboard. ------------------------------------------------------------------------------ Got Input? Slashdot Needs You. Take our quick survey online. Come on, we don't ask for help often. Plus, you'll get a chance to win $100 to spend on ThinkGeek. http://p.sf.net/sfu/slashdot-survey _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
