Greetings all; Pursuant to my need to re-think how I use the PMDX-106 to control the spindle's vsr controller, I had wired the vsr's output such that a run enabled relay is at the output of the vsr, and the reversing relay was beyond that.
Rather than switching the AC power relay to the vsr at the same time, which is an instant fault because it appears that the reset switch which is closed on the rear of the vsr's speed pot when it is turned off, is also opened at the same time. So now I'm adding a small switch to control the AC power relay so that power will be on that card already when the reset contact is released by the presence of the pwm pulses. This should fix the fault triggers I believe. It seems to me, that although the motor stops fairly decent, that it might be a safety feature if I use the back side contacts of the relay that connects the vsr to the motor as a crowbar which should stop the motor in about a rev when that relay opens. The question is, would any of you, in a small motor (400 watt) situation, use a braking resistor, or just go ahead and crowbar it? 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) Your analyst has you mixed up with another patient. Don't believe a thing he tells you. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
