<div dir="ltr">That appears to be complex geometry to do. You would need to ensure that there are no undercuts in that and there is a bit of setup to get the angle you want on the orifice. You would need to cantilever the electrode on the inside and burn that geometry. Now if all you want to do is punch a .012" round hole that would not be too hard and could be done from the inside. <br><br><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 28, 2015 at 8:58 AM, Jacob Chancery <span dir="ltr"><<a href="mailto:jacob.chancery@gmail.com" target="_blank">jacob.chancery@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">If a picture is worth a thousand words, how much is a 3D model worth?<div><br></div><div>A model of what I want to make is attached.</div><div><br></div><div>I found evidence that Ben Fleming's book is buildable, so I think I'll order a <a href="http://www.homebuiltedmmachines.com/index.php?page=buy&product=pulse_edm_starters_kit" target="_blank">starter kit</a> from him.</div><div><br></div><div>Evidence:</div><div><a href="https://www.youtube.com/watch?v=r4F3SQW11gg" target="_blank">https://www.youtube.com/watch?v=r4F3SQW11gg</a><br></div><div><a href="http://www.liming.org/edm/" target="_blank">http://www.liming.org/edm/</a><br></div><div><a href="http://modelenginenews.org/meng/edm/index.html" target="_blank">http://modelenginenews.org/meng/edm/index.html</a><br></div><div><div class="h5"><div><br></div><div><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 28, 2015 at 8:26 AM, cameron.kellough <span dir="ltr"><<a href="mailto:cameron.kellough@knology.net" target="_blank">cameron.kellough@knology.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div><div>.012 is pretty small. To drill this would likely require a sensitive drill like</div><div><br></div><div><a href="http://www.dumorecorp.com/sensitive-drill-presses#Specifications" target="_blank">http://www.dumorecorp.com/sensitive-drill-presses#Specifications</a> </div><div><br></div><div>The key point being that the 17000 rpms the dumore runs at is probably the minimum required. A quick perusal of available drill bits suggests significant depth will be hard to achieve. </div><div><br></div><div>Other options are edm already discussed and laser drilling though the depth for laser drilling is only 2mm.</div><div><br></div><div><a href="http://www.oxfordlasers.com/laser-micromachining/laser-micro-drilling/sub-contract-micro-drilling/" target="_blank">http://www.oxfordlasers.com/laser-micromachining/laser-micro-drilling/sub-contract-micro-drilling/</a></div><div><br></div><div><br></div><div>What about brazing a hypodermic needle into a reasonably sized hole.</div><div><br></div><div>--Cameron</div><div><div style="font-size:100%">Sent from my Samsung Galaxy Note®|PRO</div></div><div><div><br><br>-------- Original message --------<br>From: James Fluhler <u></u> <br>Date:05/27/2015 8:14 PM (GMT-06:00) <br>To: General discussion about makerslocal <u></u> <br>Subject: Re: [ML-General] Electrostatic Discharge Machine <br><br><div>If you needed a 12mil hole through something less thick I've got access to an xy milling table that could do it easily but it's setup for milling circuit boards not 1.5" thick pipe haha<br><br>James F.</div><div><br>On May 27, 2015, at 7:26 PM, Erik Arendall <<a href="mailto:earendall@gmail.com" target="_blank">earendall@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><p dir="ltr">Yeah a .012" hole is a tough one. EDM would give you a good finish and a true hole. Burr free too. I've contemplated a build of one before. </p>
<div class="gmail_quote">On May 27, 2015 7:20 PM, "david" <<a href="mailto:ainut@knology.net" target="_blank">ainut@knology.net</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
just buy some Hilsch vortex tubes.<br>
<br>
<br>
<br>
<br>
<div>On 05/27/15 19:18, Jacob Chancery
wrote:<br>
</div>
<blockquote type="cite">
<p>I should've said Electrical instead of Electrostatic.</p>
<p> <a href="http://en.m.wikipedia.org/wiki/Electrical_discharge_machining" target="_blank">http://en.m.wikipedia.org/wiki/Electrical_discharge_machining</a></p>
<p>I want to cut small (0.012” throat diameter) planar de Laval
nozzles in a piece of 1.5” schedule 10 pipe to spin a garret
GT1548 turbine.</p>
<p>So far I've gotten a few no-quotes, a few ”that can't be done”
and one unofficial ”more than $10,000” responses.</p>
<div class="gmail_quote">On May 27, 2015 6:44 PM, "Erik Arendall"
<<a href="mailto:earendall@gmail.com" target="_blank">earendall@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<p dir="ltr">They are interesting machines. What is your
purpose for the machine? <br>
</p>
<div class="gmail_quote">On May 27, 2015 6:33 PM, "clayton
pannell" <<a href="mailto:clayton.pannell@gmail.com" target="_blank">clayton.pannell@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<p dir="ltr">Creates ESD to cut metal</p>
<div class="gmail_quote">On May 27, 2015 5:00 PM, "Daniel
Valdez" <<a href="mailto:smeeon@gmail.com" target="_blank">smeeon@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div dir="ltr">wait.. is this to cause ESD or to
dissipate it? I'm confused and intrigued at the same
time. </div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, May 27, 2015 at
4:51 PM, Jacob Chancery <span dir="ltr"><<a href="mailto:jacob.chancery@gmail.com" target="_blank">jacob.chancery@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
<div dir="ltr">Anyone on the list ever built
their own EDM machine?
<div><br>
</div>
<div>I'm thinking about buying this starter
kit:</div>
<div><a href="http://www.homebuiltedmmachines.com/index.php?page=buy&product=pulse_edm_starters_kit" target="_blank">http://www.homebuiltedmmachines.com/index.php?page=buy&product=pulse_edm_starters_kit</a><br>
</div>
<div><br>
</div>
</div>
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