DIY pulse EDM at last with very low electrode wear
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- เผยแพร่เมื่อ 8 ก.พ. 2023
- In the fourth part of my pulse EDM series I finally got the results I need to make my Stirling heaters and coolers.
It was really a long journey with a lot of drawbacks but now I am very happy to have a true DIY pulse EDM after the self build book of Ben Fleming.
It has nearly zero wear and can be used for many more things that would be impossible with conventional machining, I have a lot of fancy ideas for it.
Thanks for watching and as always I would be very happy for your comments and suggestions. - วิทยาศาสตร์และเทคโนโลยี
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that's really incredible progress on this! you must be proud!
Thanks
Glad to see this because I just subscribed last night to see your progress on this. I'll be building my own soon, I'll be able to avoid some hurdles because of you so thank you.
Would be nice to see your progress...
You will see that it is much fun to build a EDM and see it burn.
Thanks for your nice comment an greetings
@@myengines2443 I will keep you updated woth my build, thank you!
Nice work!
Well done, a lot of effort and commitment finally paid off - great results.
Thanks!
Congratulations Ralf!
I’ve always said that building a pulse E.D.M. machine was easy, it’s just understanding how they work that’s the problem, but it looks like you got there in the end. Well done!
I’m looking forward to seeing your engines & what future projects you have in mind for this new & versatile machine in your workshop.
Thanks
What a fantastic machine you have built. I hope one day i can build one like that too, it will be possible to do desktop machining without noise or chips flying everywhere, so elegant! also complex shapes.
Cool, look forward to the next video. On your progress
Great job! Thanks for sharing your work. I look forward to your improved stirling engine video! Are you going to dyno the engine to determine HP etc?
Nicely
good job, congratulation
Thanks
Very good. I like the practical way you looked to reduce electrode wear. When estimating power, use the discharge voltage ( about 30V for Cu+/St- paarung). So 500W is near 16 amperes ( dont use the no load voltage). Can you determine when the discharge begin and use that to begin the OnTime? That would be iso-energetic and the uniform discharge power would get you consistant finishes. Also if you can detect the begin of discharge, you have the tools to monitor any low voltage during a sing;e disharge ( and to shut down that offending puls, so you'd have anti-arc ). Good stuff! Thnx TomP
Great results! You say, "Long on times is the key to low electorde wear". The scope trace seems to be saying 2.7kHz at 95% duty cycle. Have I got that right?
Very nice! Do you sell this generator? Im very interested to buy one of these.. Best regards
I can see a wire adapter in your future! Great job.
Yes that would be very nice but would cost me a year of work.
And my main passion is building Stirlibg engines...
Sehr sehr schönes Video .. Und der Name Falk sagt mir auch etwas :-)
Great job! We need to put together a digital BOM for this board. Going through and manually entering, is tedious. Would be nice to update components too from experience like yours with better diodes etc where needed
Put together a BOM guilty for everyone would be nice but difficult as every country has its own shops.
But it is not so much work to order the componets as nearly all are standart parts.
The only part I coud not find was a SMD diode (Nr. D24) S320 but a SK320B I found works also.
I am not sure if the stronger diodes are necessary but I used for D8/D9 the 15 V versions.
I think the problems I had were because of my exploding resistors and if you dont let them overheat you are fine with the cirquit as it is.
Thanks for your nice comment.
Keep up the good work! Inspiring. I will be giving it a shot here soon
Just found your videos. I would much like to build this power supply too. But is it not possible to controll your on off times with an arduino board and some code?
Do you need to buy mr flemmings book in order to get the plans for the power supply? Or is he willing to share the info via e book? I would like to integrate this power supply with a cheap 3d printer, and the electrode as toolhead. It will allow more freedom of movement, but the electrode wear is a problem. Consistant result will be compromised because of this. Have you ever thought of using a tunksten electrode used in tig welding?
I'm good at electronics and love the elegant idea of eroding metal through sparking, but without having the space or money for a mill and lathe it's pretty much impossible to build my own EDM. It's so damn frustrating.
Incredible work! Very impressed! How do you have any time?
Thanks Shane,
when the family goes to sleep I just dont watch TV or internet but go into my workshop thats all.
Greetings
Ralf
Best things happens at 4 o clock in the morning :)
What is the maximum amperage of your power supply?
Hallo Ralf
Grüße aus Wolfsburg. Ich habe deine Videos zu den Erodiermaschineneigenbau angesehen.
Komme aus der Elektronik und der IT. Deine Stirlingmotoren finde ich klasse.
Nun ich würde gern eine etwas spezielle Erodiermaschine bauen und ev. Bei Make veröffentlichen (ev mit dir zusammen?), den C. Meyer kenne ich persönlich. Der hat den Maxiposi entworfen.
Wenn möglich möchte ich von deinen Erfahrungen profitieren. Hier kann ich Erfahrungen in Elektronik und Steuerung anbieten. Nur das mit dem Diesel als Elektrolyt kriegen wir nicht durch.
Da fällt mir der alte Witz ein. Wie bekommt man schnell den Küchengeruch weg ?
Drei Tropfen Diesel auf die heiße Herdplatte ..
Hallo Axel,
danke für dein Lob.
Ich finde deine Idee sehr interessant, bin langjähriger Make Abonnent und Maker Faire Besucher.
Ich selbst bin nur Elektronik Anfänger und könnte dir sicherlich nicht behilflich sein.
Wenn du auf den Grundlagen von Ben Fleming aufbauen willst sind seine Bücher unverzichtbar und sehr lehrreich, kosten (Versand !) recht viel aber sind es wert.
Der Aufbau ohne microcontroller und so scheint zwar sehr anachronistisch aber soviel Aufwand ist der Aufbau ohne auch nicht und man kann auch den duty-cycle und anderes auf microcontroller Steuerung umbauen.
Wenn man etwas besseren Diesel (Ich nahm ARAL ULTIMATE) nimmt ist der Geruch nicht schlimmer als Petroleum auf das ich jetzt auch wieder gewechselt bin.(Bleibt klarer und ist besser abzudichten.)
Ein Abzug ist sowieso unverzichtbar und dann ist der Geruch bei sorgsamer Arbeit nicht stark.
Wenn du Fragen hast, immer hier in die Kommentare rein, ich versuche zu antworten, kann aber auch schon mal etwas dauern.
Ich bin sehr gespannt auf deine Arbeiten,
viele Grüße
Ralf
I wonder was your journey to the EDM part of the fun, or would you in hind sight better have bought a commercial unit?
Hi Timo,
a commercial unit is very big (I have only a small workshop) and if something is broken it would be very difficult to repair.
It is also a lot of fun to build it from scatch and I learned a lot.
Greetings
Repair can be a pain, if spare parts come at industrial prices instead of "hobby level" 🙂one thing that can be easily overlooked.
Could you put the power-resistors under destilled water, for cooling? If you isolate the connections between them well, water will never contact the connection-cables... And if, then destilled water is a high resistance dielectric anyway...
I plan to fix mine on a plane, and put it then, legs up, in cooled destilled water, so that only the upper 1/3rd of the resistor-bodies (the part with the most cooling fins) touches the water...
Or stick the resistors´-ends (with silicone) between two plexiglass-sheets, full of holes, to let the connection-cables in-and-out, and fill the gap with cooled dest water...
Is that an RC/pulse-hybrid-system or solely pulsed?
when i was young we once submerged a PC in motor or gearbox oil. The PC worked well but connecting or disconnecting cables was always a mess. Meaning that it works but is not really desirable, the fan solution seems to work well enough
@@johgude5045 I fixed all of the resistors´ bases/bottoms on a tablet, so I can turn the tablet over, and submerge it in water, that´s half as deep as the resistors are high (9-10mm deep, that is)... I see the fan-solution as too big of a husstle, in comparison. No idea yet, if it´s just as effective, but it must be, cause the bar is pretty low... Mayby one has to let the warmed-up water run off and refill with cool water from time to time.
Was this design the one in the book, or did you alter it to achieve such low levels of tool wear?
It is the original design of the pulse EDM of Ben Fleming.
@@myengines2443
Thank you! I have no excuse not to make one then!
What is the purpose of this machine? Thanks for sharing!
Its to cut very thin but long slots for my stainless heat exchangers for my Stirling engines you can see in others of my videos.
Please share a ckt diagram of pulse genarator.
In one of the videos you will find one...
I think the one with the oscilloscope on the thumb!
You made a wonderful machine, I request you to share a video of a machine, EDM is home made, if you share your whatsapp number, the machine you made is very good. Book ben Fleming
Did you make it from the book?
Let me tell you this first, then I will ask you only two more questions. If you allow me, thank you