---------------------------------------- > Date: Wed, 29 Oct 2008 17:21:46 -0500 > From: [EMAIL PROTECTED] > To: [email protected] > Subject: Re: [Emc-developers] spindle brake > > On Wed, Oct 29, 2008 at 10:09:23PM +0000, Chris Morley wrote: >> >> if some one programs m3 then m4 does EMC put the brake on for a >> certain amount of time, error, or just change directions of the >> spindle. > > Just changes direction. This is also how rigid tapping works. > >> On a related question when using constant surface feed does Emc wait >> till the spindle is up to speed or just assume that the spindle is up >> to speed. > > It does not wait unless you do it explicitly. > >> A guy wants to but the brake on to stop the spindle when he switches >> from m3 to m4 (apparently he doesn't program a m0) > > He could do that in ladder/hal/whatever. If he had feedback for > "the spindle is stopped now" it would be best. > >> I guess i'm asking how EMC decides when the spindle brake goes on. >> I would think in most cases a brake should not be put on until the >> spindle is already stopped. but I don't see any pins for that either. >> Maybe I missed them.. > > It turns on the brake when you tell the spindle to stop (m5, m2, > abort, estop). Thanks Chris. Maybe we could get John or Alex to mention this behavior in the docs please. I would think that a pause for up to speed would be very important for constant surface feed. On a large lathe the spindle does not slowdown/speed up that fast -the feed rate could be considerably heavier if the spindle in not up to speed. while using constant surface feed if you program a rapid out to a large diameter does the spindle follow or does it only follow during feed calls.
Cheers Chris Morley > > You could add a brake delay easily in classicladder, but stopping as > fast as possible is sometimes really what you want. > > > ------------------------------------------------------------------------- > 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-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers _________________________________________________________________ ------------------------------------------------------------------------- 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-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
