Hi, new to the forum... I have a transformer from a HK am/fm home stereo, and need some help figuring out what the heck I have here. The marking are below - if...
This should help... GRN-GRN = 5.86vac BLU-BLK = 36.2vac BLU-ORG = 72.6vac BLK-ORG = 36.2vac Is there a way to determine the VA or amps of this xformer? ... ...
I found this link and thought I would share it with all of you. Includes schematics. The top text of the page reads.. 500 watt regulated DC power supply. Here...
I have done some simple testing, perhaps someone can help me interpret my results. The transformer outputs 73 vac. I connected a 1000w 15ohm hotplate. Current...
hi jgolenia, great power supply, but NOT for an EDM SPARK GENERATOR, if that was what you want to use it for. the SPARK GENERATOR can't be a REGULATED supply!...
Just to be purely technical here, an arc is a continuous spark, or a spark is an instantaneous arc. Sparks are short term. Arcs are long term. While there are...
... Steve, if you look back to posts from last summer, you'll see some from me with links to pictures and YouTube videos that show my unit. I did not follow...
... Jim, here's an idea on the holes for switches -- get a set of punches (can be cheap from HF), set the sheet metal over a piece of wood, and hammer the...
... I'm not sure the key issue for whether or not you get an arc is keeping the voltage at the OCV -- my ancient Marquette welder has an OCV of around 90...
... My second generation (after the book version) EDM will be stepper based. Currently it is a small linear slide with ~4" travel, 200 steps/rev, 16tpi...
Thanks Andy, The plate I pop riveted on is very sturdy stuff, the original sheet metal is real flimsy, I have a cheap hole punch set for gasket making, I know...
Hi Dave, My neighbor also has a Whitney punch (as it's commonly called), but the holes it makes are to small for the switches. The more I think about it, I...
The circuit will work without that cap but the addition of the capacitor really stabilizes the burn epically with small electrodes. It does not need to be a...
Thanks Ben. Turns out I have nothing in stock at 6.8uf, so I have to order some anyway, along with the drive chip and heatsink. Speaking of the lm339, the 2...
I got into this conversation late, but, ... Depending on the type of cap, 6.8uF tend to be electrolytic. If it is the standard aluminum chloride, they have a...
My original questions were related to the type and value of cap C6. As I understand, any 6.8uF polarized cap will work. I haven't found one in the house yet,...
Hi EDM-ers, anyone in the US willing - and able - to send me the three cutting caps (two 20uF/300V and the 160uF/300V flashcap)? Been searching most of the...
www.digikey.com? www.mouser.com? ... -- A democracy cannot exist as a permanent form of government. It can only exist until the voters discover that they can...
Sweet. I can consider the board populated, minus cutting caps and ics. I intend to do the window voltage pot mod, but my 10k pot turned out to be a 20k. Might...
Err, no, actually I was talking about this kind of punch: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93460 Surprising, but true -- with a...
Ben, what's the theory behind this? At first glance, I couldn't figure out why C6 would make any difference. It doesn't seem like there should be any variation...
Andy I don't have the answer for all the hows and whys of EDM. Lots of my research is trial and error and often I don't fully understand why somethings work...
Thanks, Ben -- it sounds like your electronics knowledge is a lot like mine (trial and error)! You may recall that my design is kind of a hodge-podge of...
... Well, I asked too quickly -- it belatedly occurred to me to search past posts, and sure enough I found some answers. A diode on each of the connections to...
Hi, if you happen to have bought an inferior type of a drawer slide as I did, you may get it right by squeezing the dismantled outer guide with a precision...
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