On Thursday 30 August 2012 18:11:49 Ray Mitchell did opine: > Gene, Antekinc.com is your best bet for torroidal power supplies in the > power range you are looking for. I have used then on two builds so far > with great results.
Maybe, but for the ideal one, $84 & 16 lbs. Extra low amps windings for the logic on that one is nice though. The AN-8435 should make, into a FW bridge with 10k uf input cap, around 48 volts. And at only 6-7 amps load, should run fairly cool. > By the way, here on the west coast, the edit system parallel ports were > used to print out the EDLs. > (I was in on the beginning og the computer editing revolution!) I don't think we ever made a printable EDL. When assembling a commercial from field footage, we just marked the frames and hit go. Or lightwave could render at about a frame every 40 secs or so, and was smart enough to drive that editor. Lightwave was scriptable so we wrote a cron for the amiga that fired the whole thing up a couple minutes after the 11pm newscast was put to bed, and we did gfx production to tape the rest of the night, lights out, on an 060 equipt A4000, buffering about 10 frames at a time on the teeny HD's of the day. > --J. Ray Mitchell Jr. > [email protected] > (818)324-7573 > > > A foolish faith in authority is the worst enemy of truth. > - Einstein > > On Thu, Aug 30, 2012 at 8:22 AM, Gene Heskett <[email protected]> wrote: > > On Thursday 30 August 2012 11:08:13 Matthew Herd did opine: > > > >> Anyway, I've got some Parker OEM650 stepper drives on hand and > > > >> would like to use those for my retrofit, but they will only > > > >> accommodate phase inductances of 1 - 10 mH. Does anyone know > > > >> what the inductances are for the Superiors and Sigmas? > > > > > > > > I can't answer this one with certainty, but the G203V tolerates > > > > 1-50 mH and it works well with the steppers on my BOSS. > > > > > > Actually, I took a quick look at the specs for the parker drives. > > > It seems the most it can handle is a NEMA 34. Looking at the specs > > > on the Keling website for NEMA 34 & 42 motors, it seems that the > > > inductance in series (what I suggest for lower current drives) is > > > going to be significantly higher than 10 mH. I think they were > > > consistently over 10 mH, with the 42's at like 64 mH. The BOSS > > > motors should be in the same neighborhood, so they will probably be > > > too high for the Parker drives. Just a little inductive reasoning > > > here, I have never measured the motor inductance nor could I find > > > reliable specs. > > > > Speaking in general terms here, a motor with an inductance of 64 mH is > > going to need an expensive, very high voltage driver if its to dance > > to our music, likely 300+ volts. > > > > The 425oz nema 23's I had to put in my lathe's x screw when I found > > the smaller 50 oz wasn't up to the needed torque, were 8 wire, and in > > 4 wire parallel mode the 2M542 driver is out of amps before it has > > full current, but the speed is truly impressive for a stepper. I > > haven't explored its speed limit since I got the ball screw usable > > just yesterday, but with that screw, a 2.5mm pitch, 100 ipm seems > > within reach. I need a better power transformer for that setup > > anyway, preferably a toroid that can supply 500 watts into a FW > > bridge at 45 volts. They seem to be made out of unobtainium > > though... This one, a conventional E/I core is telegraphing its heat > > to everything else in the box, not at all good after several hours. > > I'm asking it for about 6 amps at 39 VDC. > > > > 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) > > My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! > > UH-OH!! We're out of AUTOMOBILE PARTS and RUBBER GOODS! > > > > > > ---------------------------------------------------------------------- > > -------- Live Security Virtual Conference > > Exclusive live event will cover all the ways today's security and > > threat landscape has changed and how IT managers can respond. > > Discussions will include endpoint security, mobile security and the > > latest in malware threats. > > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------ > ------ Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. > Discussions will include endpoint security, mobile security and the > latest in malware threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! There are two kinds of pedestrians... the quick and the dead. -- Lord Thomas Rober Dewar ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
