On Saturday 19 December 2015 18:34:23 Gene Heskett wrote: > On Saturday 19 December 2015 18:07:58 Gene Heskett wrote: > > My google-fu seems unusable for this. > > > > The SSR's arrived this afternoon, and I need to figure out what sort > > of an R to use as buildout as I think I will enable it with the same > > 0-12 volt signal that enables the pwm servo amplifier I am using to > > drive the spindle. > > > > They are rated 3-32 volts in, and <10 ma to fire. But I've no real > > data on the opto from sparkfun that I am using to drive the pwm > > servo's 12 volt enable. I've no clue how many mills it can actually > > source. > > > > I will go see how many it can spare with a 1k load resistor though. > > That turns out to be around 10.4 mills, but my testing found another > problem with that idea, so apparently I must use a 2nd one, and find a > pin to drive it, such that the power input is switched by the presence > or lack thereof, of a charge pump signal at 500 hz from LCNC. Why? > powered up, but LCNC is not running, the default outputs of the 5i25 > are a logic one. So that enables the servo amp (and this SSR) even if > it has no controlling signal, which in turn defeats the soft-start. > And I've no clue 5 months later, if I have a spare pin on the first > BoB. I do not believe I do without ripping out my ability to drive an > A/B/C 4th axis. > > Fun & games, including finding a mounting place for both of them.
That I found, on the outside of the box unforch. Might be advisable to make a cover just to keep the NEC happy. At some point an indeterminant time in the future. Its up on a high shelf I have to climb a small ladder or tall stepstool to access it. No pins left on P3 of the 5i25 though as I had set it up originally for an A axis, but because of driver space in the box, will have to be considered as a package in a separate driver box if and when I need it but it will be up to PCW to tell me how to load 4 stepgens when one of them is going to be driving P2. So pins 8-9 are now free to be used for these 2 functions as I have now commented out any references to the A axis in both the .ini and .hal files. But again, because the LCNC off is a logic high, I will build the charge pump detectors to drive the - terminal of the SSR. With enough filter to prevent the powerup-powerdown 1 or 3 cycle triggers associated with turning it on or off from the power switch. Now all I have to do it mount them and hook them up. And hack the charge-pump gates into my .hal file. Because of the delay in the pump detectors, I will drive that charge-pump gate from a timer, say 5 seconds after the power signal pump starts. But part of tomorrow is commited to getting Dee into a hotel room for the night as she is getting the right eye's cataracts removed early Monday. I knew she was having trouble seeing, but when she pulled the night cap off the left eye Tuesday morning her first complaint was that the TV was too bright, but it sure was hidef, which it has been for 7+ years now. Thanks all. 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) Some mill pix are at: Genes Web page <http://geneslinuxbox.net:6309/gene/GO704-pix> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
