Leslie Newell wrote: > Hi Chris, > > >> In CSS mode, at every rapid->feed transition, it waits for the spindle >> to be at speed. Once a feed is started, it does not wait anymore >> until after the next rapid. So for the facing situation where you >> feed in to the center, rapid out in Z a bit, rapid to X=big radius, >> rapid over in Z a bit, then do the next feed in -- it will pause to >> let the spindle slow down before each feed. >> > > With CSS, the spindle speed should change as the X feeds. So for > instance if I am facing the end of a bar, the spindle may be doing > 1000RPM when I start and 3000RPM by the time the cutter gets near the > middle. Does EMC do this or does it only change before the next move? >
The "at-speed" stuff Chris is describing is new. The basic CSS functionality that you are describing dates from the 2007 CNC workshop if I recall correctly. Basic CSS: As the facing cut moves in, the spindle speeds up, say from 1000 RPM to 3000 RPM. At the end of the cut when you rapid out, the spindle slows down to 1000 again. EMC has done this for a while. The at-speed issue: If your spindle and workpiece have a lot of inertia and your X axis is fast, you might finish the rapid out while the spindle is still doing 2000 RPM. Not because EMC is telling it to do 2000, but because the drive simply can't make the spindle slow down fast enough. The at-speed input, when used correctly in your HAL configuration, will make EMC wait until the speed is back down to 1000 before starting the next facing cut. Regards, John Kasunich ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
