On Friday 21 October 2016 19:01:11 andy pugh wrote: > On 21 October 2016 at 23:27, Gene Heskett <[email protected]> wrote: > > Has anyone else come to the conclusion that these things need a 12 > > volt logic level? > > Yes. They even provide you with 12V to use. > Internally, without showing it on what is supposed to function as a wiring diagram. I refuse to compliment that by calling it a schematic.
So that 12 volts stays internal and a function is enabled by using the opto to ground that terminal. So all I had to do was hook up a ground on the output side, and the fwd & rev terminals to the I0 and I1 output terminals on the 4 channel isolator board. But the output leds did not tally the enabled state until I found some 5 volts from the wall wart powering the BoB, to feed the VCC terminal on the opto board. This motor hits its nameplate FLA at around a 24 to 25 hz drive, but does take 20 minutes or so to be a hand warmer. Going slower, the vfd apparently tracks the currant and holds it to about 4 amps, so while the torque is sliding down the toilet, motor temps remain hot, but never burn you hot. Thats all no load of course. > Though, normally, the inputs need to be grounded to be active. Correct. From the computer, its doing a direction swap at 50 hz drive that indicates I have some tuning to do, the hz fade needs to be faster to slow it quicker, and when the dc brakes come in, a little less currant as its then locked in a few millisecs. Then it sits for 3 or 4 secs, then starts doing a 2 stage acceleration thats also a bit violent, making the motor jump around on the table a bit at both points. So this part gets taken apart after I get this opto kit bolted down, and hang the other, identical bob in there too, making copious notes so I can redo it in probably longer cable once I mount this box on the desk where I can get the door open and service it. I have the z motor to mount, belts to order, something to cover the x cable chain & keep some swarf out of it, make a shelf under the drawers to hold the vfd and computer, rig a monitor mount on the pipe the drum switch is on now, and some sort of a keyboard/mouse pan on some sort of a swivel so its up out of the swarf as well as can be when I'm not actually typing on it. Progress I think... My clock says 21:40, so it has to be beer-thirty. :) Thanks Andy. 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
