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. And I believe I've figured out how to squeeze the pwmservo's controls into 1, 5 pin plug. Connecting a ground to pin2 an pin4 hooks up a - for the optos for pwm and dir. 1 wire. A wire from the servo's Direction + to 7i76 DIR- makes 2, with 5 volts fed to DIR+. wire internal to the interface box. Feed interface boxes +12 unswitched power over the cable to +12 volt power on the servo, makes 3, feed ENA+ from handy 12 volts, this will be the enable on the servo's pin 5. 4 wires used 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 -- "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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
