Bryan Mumford wrote: > I have a Dell Inspiron 8600 laptop. It has no parallel port. I can > get another 8600 with a parallel port from eBay. > > My Dell gives the RTAPI error "Unexpected realtime delay on task 1" > when EMC2 opens. > > But it runs EMC programs in the backplot with no errors. There's no > output because I have no parallel port. > > I took the EMC2 live CD to a friend who has a CNC machine and a Dell > Latitude x300. We booted the CD and EMC2 gives the same RTAPI error > when it opens. But it runs his CNC mill with no obvious problems. > > I had thought the RTAPI error "Unexpected realtime delay on task 1" > was a deal breaker. But it seems to be insignificant. > > Does anyone have more details on this error or what it may mean? > The backplot couldn't care when the tool gets here or there. The motor drives and the workpiece may care very much. If the step motors are humming along at 1000 steps a second, and suddenly the CPU gets grabbed for 50 ms to check the battery status, then the motors cannot stop instantly, so they lose position, and you have no notice that has happened, except that the machine made a "klunk".
Without knowing the exact NUMBERS reported in the dmesg file, you don't know whether this was a microsecond-scale pause (not a total killer) or a tens of millisecond pause (definitely no good for motion control). Jon ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
