> > The launch of linuxcnc on the pi is without any motor power until the F2 > button is pushed. So at launch time I get messages about the z drive > being tripped. > > So I need a 1 or 2 second delay before that bit is sent on thru, but > instant transmission once timed out, giving the driver a chance to get > all its stuff in one sock from the powerup enabled by the F2 key. I want > to block any noise during the powerup surge. > > Ideas? Something simpler than a one-shot, and2 + a not, thats less time > in terms of the addf chain. Timer, driven from F2 I'm stuck with, but is > a lut5 faster than all the logic needed to "get the signal right side > up" IDK.
Hi Gene, I had similar issues. The soft start on the Servo Power supply results in the STMBL servo drive faulting out when enabled because DC power isn't there yet. I ended up making a board with a PIC12C509 that is an 8 pin processor. If I'd had an Arduino I'd probably have used that. I now need a bigger one anyway since I want to separate the Spindle Enable from the rest of the Enables. But I used external hardware to do the time delays to make sure things started up the way I wanted. You might also use time delay relays. But they aren't cheap. Ultimately an Arduino ends up being an easy solution. John Dammeyer > > Thanks. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users
FaultSensePIC.pdf
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