Greetings all; I am working on some code that probes the part to locate it pretty close, part being held between 2 sheets of dbl-sided pcb in the vise, and using the actual mill, turning slowly in reverse to detect the g38.2 contact. This part works well, but I note that when the probe is done for each side, I had turned off the spindle as I was repositioning the bit to probe the next of the 4 sides, there were times when the stop was very brutal and the ammeter needle pegged at 3+ amps. That, by deduction, told me the reversing relay was actually putting it back in the fwd direction for a few milliseconds before the drive went down from the PWM cessation.
So I hacked into the .hal file and added an or2 and a timedelay module to the mix such that the reverse relay was enabled ASAP, but its release was delayed about 50 milliseconds. And while it helps, I don't think its enough. So what I need is for Steve to advise me about the actual delays in the PWM detection in the PMDX-106 card, fall times in particular, so I can make sure this is sufficiently delayed and I don't see much if any surges as the relay releases and the braking resistor is applied. Steve? Thanks. 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> No Canadian coins. A pen in the hand of this president is far more dangerous than a gun in the hands of 200 million law-abiding citizens. ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
