On Saturday 30 July 2016 08:10:20 Erik Christiansen wrote: > On 23.07.16 18:03, Erik Christiansen wrote: > > Point 4 on the page appears to make clear that the 12v must be > > turned on before the high voltage power; there are no interlock > > relays in this basic unit, and it's BYO fan, too. > > Gene: Here's a HEADS UP!: > My Chinglish interpreter skills were lacking. What that word soup > apparently means is that the 12v must have a short rise time, to kick > the MOSFETs into oscillation, thereby keeping the magic smoke in.
So are mine, and I've spent 40 years of my working life translating the service manuals that go with Sony's high price broadcast gear. The J.A.Pan company manages to do understandably well at English. But the Chinese and Indians (despite most Indians speaking English with clipped Brit accents), neither can write it well. > Here's a chap who's bought one, putting it through its paces: > > https://www.youtube.com/watch?v=gNL4H5fC6AY > > Nothing is lost if you skip from 5 min to 20 min in the recording. > > Armed with that info, one unit might suffice, especially if the > junkbox includes reasonably equivalent spare MOSFETs. Such as those in the common atx power supply? Anyway, it seems they need a hard switched power supply, so turn it on first, then hard switch it to the unit. My problem is sourceing a suitable supply. I'd assume if I use A2, which is air hardening steel, that if I wanted full length hardening, I could simply pass a long piece thru it, paced to obtain the temp needed, that I would wind up with a full length hardened piece. But that generates a couple questions. 1. Is the austenitic state hot enough for A2? 2. Does A2 need a faster cooling profile than I'd get by doing the slow transport like this: I can visualize a mill setup with a clamp on the cold end to to move the other end into the coil, which would be mounted on the head somehow so that the x axis motion would carry it into and thru the coil, until such motion has brought the far end thru the coil and out far enough to cool, then adding an identical gripper to the end that has been thru the coil, and removing the gripper that was holding it when the x axis motion started, so that the part would continue its motion thru the coil until the full length has been so heated. I can see a couple heavy wooden blocks with pipe sections mounted at upward angles, the first one being pulled out after the second one is slid in to hold it from the hot end, maintaining a generally centered position that holds the part sufficiently level, all while the slow x motion is carrying it thru the coil. So the question then is do I need an air blast nozzle to effect a quicker cooling temp profile, located just beyond the heated portion so as to cool it faster? I have an air pump from a defunct soldering station that could supply that air in variable amounts. So, what do the experienced heat treaters here have to say about such a kludgey setup for onesies or twosies? > > Erik > > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users 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-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
