Groupers, I am a bit stumped I need to get the two power resistors (20 ohm 50 watt silicone fixed power resistors) can any body tell me where I can get these ...
I think someone had luck finding one in the trash in the form of the single heating bar in a toaster oven, either alone or added together to get the right...
You can also use a light bulb or two. and that will let you very the Resistance giving you  more control over the burn, its what I use. _._,___ You can also...
In a pinch, I've used a suitable length of MIG welding wire (wire feed type, not cored) to 'simulate' the proper resistance value. The problem arises when the...
Hi Cary, I'd love to see your EDM tapping head. You must have a divider circuit to rotate the tapping head some ratio of the EDM ram downfeed? I posted on...
Folks, I was wondering if I could use this type of power resistor instead of the other type? http://www.alliedelec.com/search/productdetail.aspx?SKU=8954452 ...
You could use that resistor but you will need to mount it on a heat sink. For what ever reason Allied has drop the spec. resistor. These suppliers drive me...
Take a look in the photos section on this group at my album (jacktarr68) for my take on the 100 watt 10 ohn resistor. It is made up of 10 100 ohm 10 watt...
I recently ordered the Allied 895-4918 resistors. They work fine and are available. If you order these ones, you might want to also order 2 mounting kits for...
Yes you can use it but it is inductively wound. A better choice would be from the NH05 series which is non-inductively wound. Aaron Sent from my iPod On Oct...
Ben Either way the aluminum housed resistors need to be mounted as the leads cannot support the part against vibration or shock. A smaller part mounted on a...
EDM folks, It is possible to combine a Bipolar transistor and a pair of resistors to make a "programmable power transistor" that functions as a resistor, -...
Hi all, Another one of Ben's machine lives as of 29OCT2009, albeit with a few minor changes. I've gone with stepper motor drive and an ATMEL AVR mega8...
Ken, That is a really nice tribute. Certainly Ben's design is tested and workable and buildable by a huge number of folks out there. Tweaking a good design...
The aluminum-housed resistor should work fine. But if you want the spec'd resistor, Mouser has it. Mouser pn 71-HL50-06Z-20. That's mouser.com. I spent the...
Okay, so I just received Ben's book on Thursday (super-fast shipment, BTW) and am collecting bits and pieces. I also bought the PCB. The PCB leaves a little...
Even as a lurker and complete amateur to this home edm subject (haven't even bought the Fleming book), I have managed to come up with a question. Over the...
Hi I've been studying this for a while too. While I have not built a machine, here's a stab at it. And open to correction of course........ Kerosene is...
In response to question 1 Using the standard EDM as per the book I burnt out an M14 tap full length of the flutes (well over 2" long) using a 3/8" diameter...
Would you be willing to post the Mouser.com parts list that you used for your purchase? I am at the "get the parts" phase right now and this would be a great...
Hi Roland, having worked for a company that used deionized water for sinker EDM when they bought 5 new Charmilles I can testify that water is not for sinkers....
Thanks, Roland. I had wondered about this. In an industrial setting, the oil/water choice will be made for different reasons than we hobbyists will use. The...
Ok, so it's basically because of the swarf volume. After seeing this slimy swarf stuff on a Sodick once, I figured it might be the dissolved gasses in the...
Hi Roland, seems like your more interested in small hole drilling. In the hole drills at work they did use softened tap water run through a reverse osmosis...
Hi, has anyone here build a wire edm before ? I'm looking for a suitable power source schematic. Or can i use the power stage of any sinker EDM ? Thank you ...
The Group meets on the third Sunday each month (this month Sunday 15th NOVEMBER, 2009) - at: McDonalds McCafe Corner Canning Highway and Berwick Street ...
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