Re: DIY EDM November 02, 2013 08:37PM |
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Re: DIY EDM November 02, 2013 09:38PM |
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Re: DIY EDM November 03, 2013 11:58AM |
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Re: DIY EDM November 03, 2013 01:04PM |
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Re: DIY EDM November 03, 2013 01:12PM |
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Re: DIY EDM November 03, 2013 01:58PM |
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Re: DIY EDM November 03, 2013 02:05PM |
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Re: DIY EDM November 03, 2013 02:37PM |
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Re: DIY EDM November 03, 2013 03:09PM |
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In my experience, yes. My little setup only went up to 40V, and it worked OK at 20V too. For something as small as a nozzle hole you might get away with 10V or less.Quote
Robin2
... it works fine at a small scale with relatively low voltages. Is that correct?
Quote
Robin2
What is the purpose of the fluid?
Re: DIY EDM November 03, 2013 03:46PM |
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Re: DIY EDM November 04, 2013 03:05AM |
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Re: DIY EDM November 04, 2013 03:45PM |
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Excalibur Hotend |
reprapzone.blogspot.de |
Re: DIY EDM November 04, 2013 06:51PM |
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Well, the material removal rate of EDM is quite a bit smaller than that of milling, but basically: yes, that's it.Quote
Does that mean I just put a needle into my nozzle, clamp it to 24 V and "spark away" those parts of a metal block that I would have needed a CNC for otherwise?
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Re: DIY EDM November 05, 2013 09:12AM |
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Re: DIY EDM November 05, 2013 11:26AM |
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Re: DIY EDM November 05, 2013 11:34AM |
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Quote
theodleif
Is it possible to build a printed lathe for that purpose?
Re: DIY EDM November 05, 2013 12:50PM |
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Re: DIY EDM November 05, 2013 03:17PM |
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Quote
I also put up a wiki page
Quote
Does the up/down motor yield useful control or is the gravity+spring+controlling time of application idea basically good enough?
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Re: DIY EDM November 06, 2013 04:01AM |
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Re: DIY EDM November 17, 2013 01:19PM |
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Re: DIY EDM November 17, 2013 05:23PM |
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Re: DIY EDM November 17, 2013 09:58PM |
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Quote
theodleif
Would you advise EDM for making tiny PCBs?
Re: DIY EDM November 18, 2013 02:58AM |
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Re: DIY EDM November 28, 2013 10:13AM |
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Re: DIY EDM November 29, 2013 11:36AM |
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Yes. I think the main disadvantage of the solenoid method is that it is harder to control the voltage at which the tool retracts. In some cases, lack of this control may result in poor quality cuts. But if one is careful it may not matter. If I work on this again, I would make a special add-on attachment for EDM that contained the device for retraction. This could be a motor+leadscrew or a voicecoil actuator or a solenoid... And I would use a dedicated Arduino to control the tool retraction, so that the firmware wouldn't be too loaded down with the high speed tool retracts...Quote
Jasper1984
That'd seem less complicated, and less wear to me than measuring the current, and moving up using the machine itself.
You might be able to use an ordinary relay - carefully remove the cover, and attach the tool to the moving part of the relay. You wouldn't use the contacts of the relay, just the solenoid and the little hinged mechanism that moves:Quote
Jasper1984
I 'deconstructed' an ancient digital (photo)camera and found a tiny solenoid in it
Re: DIY EDM January 17, 2014 12:08PM |
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Re: DIY EDM January 18, 2014 03:05PM |
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Re: DIY EDM January 23, 2014 03:52PM |
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Quote
garyhlucas
use two identical flat spring steel strips parallel to each other, one at the top one at the bottom
Re: DIY EDM March 11, 2014 10:06PM |
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