On Mon, 13 Aug 2012 16:05:19 -0400, Eric Keller wrote: > On Mon, Aug 13, 2012 at 1:45 PM, EBo <e...@sandien.com> wrote: > >> a restart takes an hour or more after shutdown? Out of curiosity, >> what >> machine might that be, and why so long? >> > We have a precision lathe that refused to make parts until it had > been > under pressure for more than 15 minutes. This was to avoid thermal > issues. > > Thermal issues as in: > > customer: "my parts are screwed up by your crummy lathe." > > lathemaker: "did you let it warm up for 15 minutes as suggested by > the > manual?" > > customer: "no, but your crummy lathe makes bad parts" > > lathemaker: "after 15 minutes are all the parts the same size?" > > customer: "yes, but ..." etc. > > I think the customers finally got to them though, we got an upgrade > that > doesn't do that anymore. It was real annoying if you had to shut > down for > a minute and then wait for 15 minutes before the timer timed out.
I could see thermal being an issue if you had coolant running through the machine to stabilize the temperature of all the pieces parts (we used that trick once to get two plates machined to 0.00005"). But I can see where that would be a problem for most shops that don't "get it" and why it might be necessary. If there was some other problem with thermal I am not sure what it would be... EBo -- ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
