a break would be a great idea. a solenoid latch that didn't release until it had stopped spinning would also be good, in which case it should require power to unlatch so that it fails safe if there's a power failure etc. Dave VanHorn wrote: ------ > A mechanical brake that is applied as the lid is opened, and power disc= onnection at the unlatching of the lid, would be about essential, I'd thi= nk. ------ --=20 Philip Stortz--"In Germany they came first for the Communists, and I didn't speak up because I wasn't a Communist.=20 Then they came for the Jews, and I didn't speak up because I wasn't a Jew.=20 Then they came for the trade unionists, and I didn't speak up because I wasn't a trade unionist.=20 Then they came for the Catholics, and I didn't speak up because I was a Protestant.=20 Then they came for me, and by that time no one was left to speak up." -- Martin Niem=F6ller, 1892-1984 (German Lutheran Pastor), on the Nazi Holocaust, Congressional Record 14th October 1968 p31636. _______________________________________________ http://www.piclist.com View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist