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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
Posted to rec.crafts.metalworking
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anyone need free WEDM work
I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off
for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl |
#2
Posted to rec.crafts.metalworking
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anyone need free WEDM work
In article s.com,
"Karl Townsend" wrote: I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl Likely, but by the time I sort through my crud to see what's worthy of having you spend time on, you'll be a mile deep in "free work", Karl. Tiny tungsten carbide cribbage board? Pointless, but... -- Cats, coffee, chocolate...vices to live by |
#3
Posted to rec.crafts.metalworking
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anyone need free WEDM work
Likely, but by the time I sort through my crud to see what's worthy of having you spend time on, you'll be a mile deep in "free work", Karl. Tiny tungsten carbide cribbage board? Pointless, but... One of the things on my list is to try cutting some custom carbide grooving tools. And maybe a custom boring bar. I already bought some HSS blanks to make custom slotting tooling for my bridgeport slotter. The tech. fella told me this is one of the few machines that will cut pure diamond. Anyone need their SO's diamond cut in half? Karl |
#4
Posted to rec.crafts.metalworking
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anyone need free WEDM work
"Karl Townsend" wrote:
The tech. fella told me this is one of the few machines that will cut pure diamond. Anyone need their SO's diamond cut in half? Karl Is diamond conductive enough??? jk |
#5
Posted to rec.crafts.metalworking
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anyone need free WEDM work
"jk" wrote in message ... "Karl Townsend" wrote: The tech. fella told me this is one of the few machines that will cut pure diamond. Anyone need their SO's diamond cut in half? Karl Is diamond conductive enough??? jk Polycrystalline diamond compacts, which are the basis for most diamond cutting tools, have enough electrical conductivity that they can be wire EDMed -- just barely. It's a slow process, but it's used to make shaped cutters for commercial woodworking, and to a lesser degree, for metalworking. The compacts are sintered with a small amount of cobalt, usually, but it's not quite like the cobalt binders in sintered tungsten carbide cutters. I'm not up on the details but the cobalt serves more to dissolve the diamond, or to aid in the diffusion of diamond-to-diamond, rather than acting like a matrix, or binder, as it does in tungsten carbide. But a small amount of metallic cobalt remains in the diamond compacts and that aids conductivity. It also makes polycrystalline diamond compacts slightly less hard (but more shock resistant) than single-crystal diamond tools. Even pure diamond has some conductivity, and various forms of synthetic diamond can be quite conductive. But the wire EDMing is generally applied to the compacts rather than to pure, single-crystal diamond. There are wire EDMs made exclusively for the cutting diamond compacts to shape. They have specially tuned power supplies. The really old Andrew machines used a conventional (for the time) RC relaxation circuit, so I'm not sure why it would be especially good for cutting diamond. Is this one of the granite-base machines with the moving head? -- Ed Huntress |
#6
Posted to rec.crafts.metalworking
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anyone need free WEDM work
The really old Andrew machines used a conventional (for the time) RC
relaxation circuit, so I'm not sure why it would be especially good for cutting diamond. Is this one of the granite-base machines with the moving head? Yes. According to Mike, there were three major generations of wire burn circuits on the Charmilles Andrew machines, the focus of technology at the time. The machine I have was made just before pulling the Andrew name off the machine. Again, according to Mike, the next focus was making the burn circuit more user friendly by computerizing the control of the burn circuit. This worked, but you actually lost ability to do the tuff stuff if you knew the machines well. Karl |
#7
Posted to rec.crafts.metalworking
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anyone need free WEDM work
jk writes:
"Karl Townsend" wrote: The tech. fella told me this is one of the few machines that will cut pure diamond. Anyone need their SO's diamond cut in half? Karl Is diamond conductive enough??? Interestingly, diamond has great thermal conductivity and great electrical conductivity. Can you say heat sink insulators? -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
#8
Posted to rec.crafts.metalworking
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anyone need free WEDM work
"David Lesher" wrote in message ... jk writes: "Karl Townsend" wrote: The tech. fella told me this is one of the few machines that will cut pure diamond. Anyone need their SO's diamond cut in half? Karl Is diamond conductive enough??? Interestingly, diamond has great thermal conductivity and great electrical conductivity. Can you say heat sink insulators? Uh, actually diamond is one of the materials with the phonon-carrier anomaly. It's a great thermal conductor (better than silver) but it's an electrical insulator. There are some surface-conductivity phenomena which have only recently been understood, but the bulk electrical resistance of diamond is very high. Impurities and intentional additives in synthetic diamonds can alter this. -- Ed Huntress |
#9
Posted to rec.crafts.metalworking
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anyone need free WEDM work
On 2008-10-24, David Lesher wrote:
jk writes: [ ... ] Is diamond conductive enough??? Interestingly, diamond has great thermal conductivity and great electrical conductivity. Can you say heat sink insulators? Hmm ... insulators with "great electrical conductivity"? I don't think so. :-) Enjoy, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
#10
Posted to rec.crafts.metalworking
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anyone need free WEDM work
Karl Townsend wrote: I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl How about making a few custom pasta extruder dies to go on the KitchenAid grinder? Dies with people's initials, logos, etc. ought to make good holiday gifts. |
#11
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anyone need free WEDM work
On Fri, 24 Oct 2008 10:08:56 -0500, "Pete C."
wrote: Karl Townsend wrote: I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl How about making a few custom pasta extruder dies to go on the KitchenAid grinder? Dies with people's initials, logos, etc. ought to make good holiday gifts. Something like this? http://www.gobaz.com/prodhuge/6890.jpg Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com |
#12
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anyone need free WEDM work
Spehro Pefhany wrote: On Fri, 24 Oct 2008 10:08:56 -0500, "Pete C." wrote: Karl Townsend wrote: I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl How about making a few custom pasta extruder dies to go on the KitchenAid grinder? Dies with people's initials, logos, etc. ought to make good holiday gifts. Something like this? http://www.gobaz.com/prodhuge/6890.jpg Essentially, but more personalized to the recipients. |
#13
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anyone need free WEDM work
On Fri, 24 Oct 2008 12:01:03 -0400, the infamous Spehro Pefhany
scrawled the following: On Fri, 24 Oct 2008 10:08:56 -0500, "Pete C." wrote: Karl Townsend wrote: I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? Karl How about making a few custom pasta extruder dies to go on the KitchenAid grinder? Dies with people's initials, logos, etc. ought to make good holiday gifts. Something like this? http://www.gobaz.com/prodhuge/6890.jpg Is that what they use to make that pasta putanesca dish? -- "The latest documents released this week showed that priests with drug, alcohol and sexual abuse problems continued in the ministry as recently as two years ago. That doesn't sound like a church, it sounds like Congress with holy water." -Jay Leno |
#14
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anyone need free WEDM work
--Here ya go; I've wanted a little injection molding die for this
widget for a decade and more. Ping me offlist and maybe we can talk further? http://www.nmpproducts.com/nmp02.htm -- "Steamboat Ed" Haas : $150,000,000,000 in pork?? Hacking the Trailing Edge! : Om Mane Padme Hum www.nmpproducts.com ---Decks a-wash in a sea of words--- |
#15
Posted to rec.crafts.metalworking
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anyone need free WEDM work
steamer wrote: --Here ya go; I've wanted a little injection molding die for this widget for a decade and more. Ping me offlist and maybe we can talk further? http://www.nmpproducts.com/nmp02.htm Interesting, however the little squeeze-to-release nuts sold for the purpose are cheap, and easy to fab yourself if you want. I just bought one for the $5 or so. http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3 Model #209-9003 |
#16
Posted to rec.crafts.metalworking
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anyone need free WEDM work
steamer wrote:
--Here ya go; I've wanted a little injection molding die for this widget for a decade and more. Ping me offlist and maybe we can talk further? http://www.nmpproducts.com/nmp02.htm Why bother with a thing like that which need an air hose when the spring closed split nut works so well????? That was one of the first things I made when starting on the mill. ...lew... |
#17
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anyone need free WEDM work
On 24 Oct 2008 15:57:38 GMT, steamer wrote:
--Here ya go; I've wanted a little injection molding die for this widget for a decade and more. Ping me offlist and maybe we can talk further? http://www.nmpproducts.com/nmp02.htm Looks interesting - but if you can snap it on as threaded rod at the middle with finger pressure, and the two mating 'locks' are just tight enough to allow this, the centripetal force of spinning it with air to turn will potentially launch the two halves in opposite directions with a rather scary escape velocity. "INCOMING!!" You would have to make the mating locks rather large enough to be permanent and spin it onto the end of the shaft - and in that case why not make the nut out of a solid piece of material and skip the split? Or make the two halves with channels on both ends, and two 'dogbone' keys to assemble onto the shaft. Then you have to add a ball detent to each nut-half or dogbone to lock the keys in place... -- Bruce -- |
#18
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anyone need free WEDM work
On Sat, 25 Oct 2008 00:51:21 -0700, the infamous Bruce L. Bergman
scrawled the following: On 24 Oct 2008 15:57:38 GMT, steamer wrote: --Here ya go; I've wanted a little injection molding die for this widget for a decade and more. Ping me offlist and maybe we can talk further? http://www.nmpproducts.com/nmp02.htm Looks interesting - but if you can snap it on as threaded rod at the middle with finger pressure, and the two mating 'locks' are just tight enough to allow this, the centripetal force of spinning it with air to turn will potentially launch the two halves in opposite directions with a rather scary escape velocity. "INCOMING!!" Hmm, were those meant to snap together or slide together? If slid, they'd have considerably less "INCOMING!" potential. -- Some days, it's not even worth chewing through the restraints. |
#19
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anyone need free WEDM work
Larry Jaques wrote:
Hmm, were those meant to snap together or slide together? ... Uhh ... they can't slide 'cause they're threaded. Now if one side was smooth, it could slide & the threads on the other side would allow spinning & holding. Bob -- Nota for President |
#20
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anyone need free WEDM work
--Fear not gang; I worked out all the kinks and the prototype has
lasted for a decade and more. Trouble with the spring-clamps is sometimes they slip, which can make for a 'very bad day'; my design can't do that. It's cheaper, too. -- "Steamboat Ed" Haas : $150,000,000,000 in pork?? Hacking the Trailing Edge! : Om Mane Padme Hum www.nmpproducts.com ---Decks a-wash in a sea of words--- |
#21
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anyone need free WEDM work
On Sat, 25 Oct 2008 11:38:49 -0400, the infamous Bob Engelhardt
scrawled the following: Larry Jaques wrote: Hmm, were those meant to snap together or slide together? ... Uhh ... they can't slide 'cause they're threaded. Now if one side was smooth, it could slide & the threads on the other side would allow spinning & holding. Assemble, then screw on? -- Some days, it's not even worth chewing through the restraints. |
#22
Posted to rec.crafts.metalworking
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anyone need free WEDM work
"Karl Townsend" wrote:
I bought a Charmilles Andrew wire EDM about a year ago. After trying on/off for many days over the last year, I hired a fella to come out. The guy is a genius at WEDM! He had us going in minutes by finding the broken wire that had a feedback voltage working poorly. Anyway, I'm going to do nothing but run my new toy for the next few weeks. I've got a few parts I need, but I really could use more work. Anyone need something? What did you have to give for it and then pay to provision it? What is the dielectric fluid? One of my co-workers worked for Charmilles in machine build a number of years ago. Can you turn it into a sinker to burn out taps? Wes -- "Additionally as a security officer, I carry a gun to protect government officials but my life isn't worth protecting at home in their eyes." Dick Anthony Heller |
#23
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anyone need free WEDM work
What did you have to give for it and then pay to provision it? What is the dielectric fluid? I gave $500 for the machine. I've spent another $500 getting it going. DI water is the dieletric. Can you turn it into a sinker to burn out taps? No, but I already have a sinker EDM Sorry about the slow reply. Karl |
#24
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anyone need free WEDM work
"Karl Townsend" wrote:
I gave $500 for the machine. I've spent another $500 getting it going. DI water is the dieletric. DI is about 4 bucks a gallon from mcmasters, had to buy a few jugs the other day for a trumpf laser marker's cooling system. A grand for a working wire edm, sweet. Wes |
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