On Saturday, January 29, 2011 08:55:28 am Farzin Kamangar did opine: > Hello EMC users, > I would like to find out which Parallel port pins are on and which > pins are off between the computer power on and the time EMC starts. > This is essential for me because when I turn the computer on my spindle > starts turning and keeps on turning utill EMC starts and its logo > appears on the screen (when it stops turning). Some of my axis drives > get enabled during this time also. How can I prevent these events to > happen between turning on the computer time and when EMC starts? Thanks > Farzin
That is one of the hazards of a direct control scheme. Here I do not have a problem such as that because I use a PMDX-106 to control the VSD for my spindle, and without the steady PWM signal from the computer that also controls its speed, and my enabling the computers control by hand once emc is running, there is no spindle motion. I used center off switches, and the computer has control when they are off, flipped to one side or the other for fwd/rev, then I have a manual speed control control available too. Many have rigged a similar, needs a heartbeat from emc sort of control, and there are no doubt several other ways to achieve that function. The simplest of course is to not power up the spindle at all until emc is running. There may, I haven't looked, be some suggestions about how to do this on the emc wiki at <http://wiki.linuxcnc.org>, and I'm sure others will chime in with suggestions too. -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) <http://tinyurl.com/ddg5bz> Q: How does a Unix guru have sex? A: unzip;strip;touch;finger;mount;fsck;more;yes;umount;sleep -- unknown source ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
