On Thursday 07 February 2019 13:07:53 Gene Heskett wrote: > On Tuesday 05 February 2019 21:49:21 Gene Heskett wrote: > > So ATM I have a reserved input for the probe, and the steppers to > > wire step-dir sigs to, and I think put the probe on a 5 pin plug > > thats not busy. > > > > Then I should be ready to smoke test it by late tomorrow.. So far > > I've not given the motors any power, safer that way. But I had to > > redo the mechanics of the x home switch, buried under a bunch of > > covers, its probably still not mechanically right, but I'll need > > stepper power and a good light to see what needs to be done. > > Got that all done, but wore out a knee, its about due for another acid > shot, giving me he!! this morning yet. Steppers all done, as are home > switches.
Correction, to clarify what I am doing to me when I take a copy to the machine to build it. I believe I've figured out how to squeeze the pwmservo's controls into 1, 5 pin plug. Connecting a ground to pin2 and pin4 on the servo hooks up a - for the optos for pwm and dir. 1 wire. The shields in a two pair cable, use pin 3 in the GS12-5 connector. Feed regulated 5 volts to spindir+ right on the 7i76. no cable wire Feed spindir- to servo pin 3, direction+. 2nd cable wire, will pullup servo direction line. feed 5 volts regulated to spindir+. wire internal to the interface box Feed interface boxes +12 unswitched power over the cable to +12 volt Feed regulated 12 volts to spinena+, Third wire Feed spinena- to servo enable on pin 5. Find pwmgen-01.pulse to PWM + on servo pin-1 > Feed a signal from the Sainsmart's pwm-1-output to the pwm+ at pin1 on > the servo is the 5th wire and the connector is full. Once thats done, > take 3/8" off the bottom of the swarf shield over the x-home-switch, > which will allow that to come back over the top of the y motor, giving > me back a sorely needed additional inch or more of y motion. The table > was coming forward but this swarf shield was too long and was hitting > the motor mount. If I clear that, I gain nearly 1.5" of y motion. > When I put that bellows cover on, I was far more concerned with > keeping swarf out of the y screw when I built it 4 years ago. > > Now, a question for Jon: > > Normally that 12 volts to the logic on pin 6 will be present anytime > the interfaces line cord is plugged in, and which I intend eventually > to plug into the power strip that feeds the rest of the motor power > box. So it will come on with all the stepper drivers, but spindle > power is soft started by enabling the machine from F2, takes 3 seconds > to get full power. And I don't trip a 30 amp breaker charging the > supplies caps. > > But is it safe to apply the high voltage motor power to the pwm-servo > amp IF for some reason the interface is powerless and its 12 volt > supply is off. This will put full motor power at pins-1-2, with no > logic power on pin 6. > > Is that safe, or will it let some smoke out and kill all the local > kittens? I could rig a relay, or better yet, move the SSR + terminals > to the 12 volt supply, better yet disable that in hal if the 12 volts > isn't there by changing the sserial com mode so it will send an a/d > output back to lcnc. Thats slower of course but I'll check it out. > > Thanks Jon. > > Cheers, Gene Heskett 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) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
