On Tuesday 29 June 2010, Mark Wendt wrote: >On 06/19/2010 04:53 PM, Gene Heskett wrote: >> Hi all; >> >> I have a rather weird thing that seems to have developed, apparently >> while my 4th axis, a rotary table, was disconnected and machined so that >> it has a good friction lock that can be mostly released by injecting >> high pressure air into a groove in the face of the mating surfaces to >> lift and air lubricate it, which of course also leaks into the whole of >> the casting& tries to blow the grease out of the center bearing. > >Kewl. Was that intentional? ;-) > >Mark >
Uhh no Mark, not really, but as I was reassembling it, it occurred to me that the innards of it were fairly well sealed, and since the air I was injecting into the groove leaked inward as well as outward, that there would be an internal pressure buildup too. But the more I thought about it, the less inclined I was to drill a vent hole since that pressure would just help to lift the table free. I packed it with chassis grease under the bull gear, so I won't worry about the grease blowing out of the bearing until I don't see any more blowing out. That bearing is not a high precision bearing anyway and the max rpms is about 1. Shrug . I have not yet found a suitable solenoid driven air valve to do that switching with. Herbach & Rademan have a manifold of 6 of them thats not terribly pricey, so I may get that one. With spares, who knows what else I can do after controlling the mister and the table lock? But most of this is on the back burner ATM, we're still running chain saws and what have you after the wind came through here last Thursday. One estimate I have already is for $8732, includes a fresh roof and gutters. Then a siding patch and some of the back deck & some fencing. I have about 3/4's of the 3 50 foot pines trees we lost cleaned up, but still have 2 10 foot tall stumps to clear, but can't get to them until another neighbor comes and clears out what is left of a 10x16 steel yard shed that got transplanted about 200 feet. The last surviving pine, one of the 5 Dee planted in 1980, looks like hell when standing on the roof where I can see into its mid-section better, so it may not survive the long haul either. Several broken 3" thick branches 20 feet up. A recording anemometer about a block away and 30 feet lower recorded 112 mph. Straight line wind according to the NWS that came through drawing a map as they went, although some claim to have seen a funnel. The governor I guess has declared Weston a disaster area. With all the trees pretty well cleaned up, the neighborhood sure looks different. It will take at least 25 years to even begin to restore the shade and privacy we had. I doubt I'll see that day, nor will Dee. But I got a tv antenna back up today, so the Alaskan Divorce is at least on hold now that Dee has a tv to watch again. ;-) -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) To err is human. To blame someone else for your mistakes is even more human. ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
