On Tue, 2012-08-14 at 17:40 +0200, Andrea Buono wrote: > Hi, > > I know this HAL pin but the problem is before, I mean I know that the axis > have to move because the pid output is not zero and then with some net and > delay I unlock the brake and set the direction output for the motor, if I > take the feed-hold to true the command gone to zero and the axis will not > move forever you know? > What do you think of the behavior of the locking-indexer? Is possible to > reproduce something like this for linear axis to? > > Andrea
I have no experience with this but, my thinking is that one should read the locked axis position and make that the commanded position, then when the the axis is unlocked, with a small delay for the brake to become fully unlocked, the axis will not move. Then the new position can be commanded without worrying about the brake being on. Thinking a little more, it seems the problem is in the sequence of g-code commands. When the axis stops, the commanded and actual position should match, or at least after a short time. The brake can be applied. Then when a new position is needed, release the brake, wait a short time, then command the new position. Or, I could be completely wrong. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ 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-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
