Homemade EDM Sinker

After building our latest homemade CNC machine (check out that video) we found ourselves never using our older DIY CNC machine. We thought hard about what to do with it, and decided to turn it into a dedicated EDM machine. After all, it's an extremely rigid epoxy granite CNC machine with a perfectly fine X Y Z motion system. We hope that getting a good working EDM sinker machine will help us produce higher quality molds for our homemade plastic injection machine.
While this was just our first round of testing, we will continue to work on this DIY machine and turn it into a proper homemade CNC EDM Sinker Machine.
Make sure to follow our CNC adventures by hitting the SUBSCRIBE button right away - it helps our channel grow!
If you are interested in turning your own equipment into an EDM for broken tap removal or to cut hard metals such as carbide, feel free to support our channel by purchasing the power supply from us at actionbox.ca/products/edm-pow...
We built a CNC Machine
• Homemade CNC Machine! ...
We built a Wire EDM
• How We Made A Wire EDM...
We built an EDM Sinker
• Homemade EDM Sinker
We built a Plastic Injection Machine
• Homemade Plastic Injec...
We built an Anodizing Setup
• Homemade Anodizing Setup
We built CNC Router
• HOMEMADE CNC ROUTER.
#CNC #machineshop #DIY #epoxy #mill #engineering #machine

[@ActionBOX]

If you'd like to help make future projects like this possible please consider supporting them / us by becoming a channel member: kzbin.info/door/HrFvnP1EEEZHNam_Nk_5rQjoin/join A big thanks to those who already support the projects!

[@TimSmith-vl4qk]

and use Silicon Aluminum Bronze its stronger

[@edmguru9056]

This is an interesting build, but like a lot of builds that you come across online, there’s a few problems with it I’m afraid which I’ll try to address but first off there is no problem with machining graphite electrodes in my opinion which I did for decades, when I had my own die and tool making business, with no problems. The secret, if there is one, is to soak the graphite in your dielectric fluid tank for a few days before use. When machined the graphite powder clumps and stays in place and doesn’t seem to get airborne. This powder can also be used in a stainless steel tray in your furnace to stop oxidation when heat treating tool steel etc which is a bonus. Now to get back to the EDM build, the electrode should be mounted in an insulated holder which could be collet based or just a vee block, this would eliminate any possible spindle bearing damage. Also the polarity of the electrode in solid sink EDM is normally positive as opposed to negative for wire EDM the exceptions are when eroding tungsten carbide, copper, steel (but only if using graphite as a roughing electrode - electrode wear is higher but metal removal is four times faster) and possibly when eroding steel into steel which is not recommended. The power generator is the biggest issue as it needs to be a square wave pulse, with variable spark gap voltage control, frequency and pulse duration between 1 and 150 kHz and effectively 50 to 95% duty cycle (on time). Also there needs to be (which you probably already have) a variable output current control (Amps) and crucially an on/ off work head lift timer for flushing. I’m sorry if all this seems to be harsh but I admire your enthusiasm and drive, which I wish I had nowadays, and I’m sure that in the end you’ll succeed in building an awesome spark erosion machine.

[@ActionBOX]

Thank you for the detailed write up. I did not take it the wrong way, and I appreciate your comments. I will make use of them in my subsequent builds. Cheers.

[@bobweiram6321]

The black residue is iron oxide, or rust. The red rust you normally encounter is Fe2O3 due to being created in a high free oxygen environment, black rust, or Fe3O4 is formed in low free oxygen environments such as underwater. Black rust protects iron from red rust when it's a thin layer. It's a traditional way to protect iron from corrosion.

[@ActionBOX]

So I wouldn’t get this black residue if I used aluminum? Thanks for your detailed answer.

[@processedmeattv]

@@ActionBOX I ran an industrial sink edm for 7 years, with aluminum you would still get a residue but it would be a light grey

[@RUNCNC]

next video: How do I fix edm 'ed spindle bearings, lol. Or did I understand the wiring wrong? Anyway thanks for the video. EDM could be handy, didn't know this is so easy.

[@ActionBOX]

Hahahah very true. I will tackle this problem in a future iteration, but for now I really wanted to show the functionality prior to innovating further. I think the bearing should be fine for now as it was not spinning!?!? Thoughts? Cheers, Dave.

[@RUNCNC]

@@ActionBOX I just watched your cnc build video - that's a decent one !!!!

[@ActionBOX]

@RUN CNC AT HOME Thanks for the support. That was definitely a much bigger project that I hope to rebuild but on a bigger scale. Hopefully when I go through it again I can document properly. You should check out the plastic injection video as well if this sort of stuff interests you.

[@anullhandle]

@@ActionBOX if current was going through the bearing it's toast.

[@pappaflammyboi5799]

If the current is high enough, and it is conducted through the bearings, you can get significant pitting after awhile. I do motor design, both electrical and mechanical, as a business consultant.

[@AgainsT1992]

May I suggest some changes? First of all mount the cable to the electrode directly to save your bearings and ensure better contactivity.. Also you should use a small pump to generate some flow around the electrode to get rid of the removed particles quickly.. And maybe you can clean your electrode before using it with some fine sand paper.. Mounting the part is usually not necessary - maybe your feeeds are too agressive so you plunge into the part before all the material is removed? Maybe this helps a little - good luck :)

[@ActionBOX]

Great reply. Thanks a bunch

[@barrynicholls3467]

Along time ago we had a system to spark erode broken drills 3mm from a cast item of exotic metal. We used to mount it in a box and build the dam around the hole which we filled with distilled water. We then flooded the box with nitrogen before eroding the snapped drill. On a larger version we placed a magnet that we had coated in plastic to make it wipe cleanable and circulated the water with a pump to remove some / most of the gunge. They now put a magnet filter in heating systems to catch the gunge.

[@sebastianuhl]

Aren‘t you EDMing your spindle bearing surfaces too? 😬 Great content as usual!

[@ActionBOX]

Hahahah very true. I will tackle this problem in a future iteration, but for now I really wanted to show the functionality prior to innovating further. While I no longer need this anyways, I think the bearing should be fine for now as it was not spinning!?!? Thoughts? Thanks for watching in detail though Cheers, Dave.

[@JesseSchoch]

@@ActionBOX not spinning is worse. I'm guessing a good chunk of your sparks eroded ball shaped craters in your races which you can't fix. The grease in the bearing likely acts as a dielectric just like your DI water and how has all the eroded race material gummed up in it. hope i'm wrong.

[@ActionBOX]

@@JesseSchoch I’m not sure this is true as the static position always has at least one improved point of constant contact between the outside and inside, via a bearing ball, creating a path of least resistance. Either way, I agree that it was not the best decision to pass current 🤷🏻‍♂️. I hope you enjoyed the video regardless 😃

[@JesseSchoch]

@@ActionBOX hope so, bad ground causing bearing wear due to current passing is a thing. Cross fingers and hope the bearing preload fully closed the circuit after the first spark eroded and the grease broke down.

[@littlejackalo5326]

@@ActionBOX yeah, there is most likely full contact, creating a low resistant path, and no spark gap. No spark gap usually means no erosion. But still, there may be some erosion happening. Even if there is 1 ball not napping contact, it could potentially create a spark gap.

[@jonjon3829]

Finally a view of the old machine, really like this setup to be honest. The 5 axis conversion we spoke about, I dived deeper into it and it would only allow for very light cuts, the harmonic/servo combo. The torsional stiffness of a harmonic drive is poor for this type of operation. A cycloidal reducer would be a better solution in this case. There's also the issue with control, for reliable axis operations you'd probably need a vector drive(high torque at 0 RPM), CTB sells a basic drive for $500, but the direct drive motors they sell are $1500 and up. Because of this I started researching how to design my own PMSM motor that I can run with their drive. Ansys electrical has a nice wizard for this.

[@ActionBOX]

Thanks Jon 😊

[@AhmedSalah-er7wk]

Impressive. however, one important reason for using dielectric fluid is to wash up the residue caused by the process so using running fluid would be better

[@ActionBOX]

Absolutely, I will add that in my next video for sure. Thank you for your input.

[@littlejackalo5326]

He mentioned that the fluid is used to wash away the "cuttings" in the video.

[@AhmedSalah-er7wk]

@@littlejackalo5326 kzbin.info/www/bejne/aJbahJV_apd8ecU

[@GBWM_CNC]

Always great content! Keep it up!

[@ActionBOX]

Thanks. I just checked out your channel and was impressed with your lathe. We should talk. Thanks for checking out our videos 😃. - Dave

[@machineshopatthebottomofth3213]

I have to say you get through an impressive amount of projects! Won’t be long before you have the facilities of a aerospace multinational!

[@ActionBOX]

Hahaha this is what we enjoy doing. I guess you’re onto us… we’re secretly building a spaceship 😜 Glad you enjoyed watching the videos!

[@forgeperformanceand4x4]

Brilliant as always

[@ActionBOX]

Thank you! Cheers! any plans of building your own?

[@forgeperformanceand4x4]

@@ActionBOXnot sure on this one. Currently overhauling the 2nd mill but might get added to the list

[@steveellis8347]

Couple of things here.. wire edm typically uses a high frequency pulsed dc, some materials require you to reverse polarity, and lastly, rigidity isn't as critical as with other machining.. it should cut without ever touching the material.

[@clypeum5063]

You Guys are crazy! Great quality content and awesome Projects! Greetings from Germany

[@ActionBOX]

Thank you for your kind words. I’m glad you are enjoying our content 😃. I’m curious though, are you a machinist or someone who uses/ would ever use these machines, or just entertained by this content? 😅cheers, Dave

[@clypeum5063]

@@ActionBOX 2 1/2 yeara mechanical engineering student :)

[@ActionBOX]

@@clypeum5063 ahhhh, makes sense. I admire the curiosity then. In my second year I wasn't exactly educating myself on EDM machines on the side so good for you 😜. do you have a strong interest in machines? Cheers, Dave

[@clypeum5063]

@@ActionBOX yes, 50% studying 50% building up my own Shop. decently Sized Mill, lathe, Welder, CNC Mill (Maho MH600), CNC Plasma, a small Arburg injection molding Machine... Endless Projects, Always something to learn, you know the Drill. Cheers!

[@ActionBOX]

@@clypeum5063 that’s awesome, I respect your passion. I did the same thing. Good luck to you my friend. - Dave

[@Resonantfate]

I do computer work for an old machine shop. They do EDM work all the time. They have both sinker and wire EDM machines. They commonly used graphite for sinker electrodes. The electrode erodes away over time, so they need to make the sinker electrode slightly longer than the desired hole. So for a 2mm depth impression they might make the sinker electrode 2.05mm long (purely spitball numbers, don't use that for actual ratios). They machine graphite to make stamps, all kinds of shapes.

[@ActionBOX]

Thats good to know, thanks for sharing 😃.

[@artrock8175]

I came for the Electronic Dance Music, but stayed for the Electronic Discharge Machining! 😎👍

[@ActionBOX]

Hahahaha I love this comment! Maybe we’ll include some EDM music in our upcoming videos 🤪 Thanks for watching!

[@alirezamirabdolbaghi651]

Very Good Machine

[@ActionBOX]

Thank you 😊

[@whatsonh5737]

This black residue is particles of steel and electrode. You burn material but material does'not disappear (you can think of it as chips in milling). Because of that you dielectric is not a dielectric anymore ;) Thats why sinker or wire edms have filter and deionization stations - to keep dielectric clean.

[@ActionBOX]

Thank you for sharing. This is great information. I will try to incorporate it in my future design before making another video. Cheers.

[@Redtr-mi3lp]

I worked in a brass foundry edm wire is around 70% copper and 30% zinc nearly pure, the brass rod has around 2.5% lead and another 2-3 % impurites often Aluminum and pot metals

[@smorrow]

> 70% copper and 30% zinc So it's (ammunition)cartridge brass.

[@carneeki]

Details on the current supply are limited, I checked the website. Will there be a video, at least describing the output, voltage range, current range and frequency if not the construction?

[@ActionBOX]

Hi Adam, yes we plan on putting together a subsequent video with more specific details. Cheers

[@carneeki]

@@ActionBOX awesome! Thanks

[@MadHatter123456]

You need to implement some kind of peck-drilling cycle and only let the current flow when the tool is in the lowest position inside the material. Otherwise, great video!

[@ActionBOX]

Interesting, so do you mean I should rough out my part with the cnc, and then insert the electrode? I’m intrigued, please enlighten me. Cheers, Dave

[@MadHatter123456]

@@ActionBOX nono. Pure EDM, but use a peck-drilling cycle. Retract to flush out the "chips", then go in again. Only turn the EDM when you're bottoming, then retract and flush again...

[@purvam-lq1mv]

Please make a dedicated video about how to make mould perfectly and how we can assemble it..

[@galvidmar1247]

Is it ok to use this in a spindle? If I put to low current and to high frequency and i push it too much can there be a spark in the bearings of the spindle?

[@ActionBOX]

Great question. The answer is No, I do not recommend you run current through a spindle if it is a spindle on a machine you plan to keep. As I mentioned in our video, our machine was to be disposed of, hence we didn’t care about the spindle bearing.

[@processedmeattv]

You will always have electrode wear especially on deep cuts over 1mm, I would suggest adding a flushing system If possible to clear the cavity as you burn

[@max_eley]

Hey, I own quite a few EDM machines, I have videos of them, the black stuff you see is the eroded steel, usually it goes thru a filter array, then circulates back, what are you using for the spark generator?, do you have spark gap comp?, id recomend using ONLY copper for your electrodes, graphite is awful.

[@ActionBOX]

This is awesome and super useful information. As I continue to iterate I’ll keep this in mind. Why is graphite so awful, and do you think tungsten copper is significantly better than normal copper? Or should I save my money and get normal copper for electrodes?

[@max_eley]

​@@ActionBOX Hey, no worries! Here is what id recommend, While graphite has a faster material removal than copper for EDM, it leaves behind some of the most awful residue behind, when you machine an electrode with it, the copper tends to get into your ballscrews and guides really fucking them up, graphite dust is quite abrasive, and as you mentioned if you inhale certain types, it is quite bad for you. The grade of copper we use is Copper 2.0060, you can buy it from EDM suppliers with an already machined clamping form for systems like EROWA and System 3R. It is similar to aluminium to machine, however you want to lower your stepover and federate as it is very "gummy", coolant is a must. From what i saw you were just plunging directly into the part with your electrode, you dont want to do that, you need to "peck" as you are not allowing the dielectric to flush out the eroded particles, EDM by its nature is very slow, literally microns at a time in some cases. It looks to me you are using one of those portable EDM power supplies, these are typically only used for extracting bolts and such, and are not capable of anything tolerances, no spark gap, ect. Many spark generators on commerical machine tools are held as company secrets, but there is this guy i know, search up BAXEDM, he made his own wire edm machine, he also has his own spark generator which you can buy, it has all the features of a commercial spark generator, but very cost effective. Dont hesitate to ask me any questions about designing your EDM : D

[@ActionBOX]

@@max_eley Thanks a bunch Max, this was super informative. Can you tell me more about the EDM power supplies? I could definitely benefit from purchasing a better one, and also understanding the physics a little better. (AKA more information about the "Spark Gap" etc.). Thanks 😃

[@max_eley]

@@ActionBOX Hello, The EDM power supply is referred to as the "Spark Generator", it is responsible for putting the power into the electrode, however very accurately, it is programmable from the control, how much power you want to deliver, basically, You cant tell the electrode to go to -20mm because once eroded, you will be deeper than expected, depending on how much power you put in, spark gap is the value from the electrode, to the actual eroded depth, because the electrode never actually touches the material. On an industrial machine tool the control has what we call "techno" or erosion technology which automatically compensates for the difference, it contains lists of materials and power levels ect, so that you can get a highly accurate size, i wouldn't have any knowledge how you could integrate that into a controller like the one you're using, but it probably can be done as ive seen BAXEDM erode something very accurately on his youtube channel. Here is his website for more information about his EDM: www.baxedm.com/ It is certainly cost effective to build your own EDM, but it may just be more convenient to just buy a second hand EDM, and refurbish it if you are looking to just make parts.

[@christopherleveck6835]

@@max_eley 3000 euros for the generator alone. And its features are all locked down. You send them money and they will send you codes or firmware to make whatever features you want to make it work. It's a nightmare but you don't know until you are forced into a corner. Bad business model.

[@yourlocaltoad5102]

Would it be possible to add this to a manual milling machine and just move everything very slowly to cut out parts from sheet metal using edm?

[@ActionBOX]

Yes indeed. That’s exactly how it would work. Cheers

[@aidannolan6656]

Black stuff is probably a type of iron oxide - ‘Iron (ll) oxide’ (Fe3O4) which (typically) forms in a low-oxygen environment. Central heating systems which circulate water in a closed loop through a number of steel panel radiators often suffer from a build up of this ‘black rust’ which when drained periodically comes out as a black liquid - looks very much like your black stuff. Good video by the way…🙂

[@ActionBOX]

Thanks a bunch, your explanation was super clear. I wish I had known prior to filming the video so I could have incorporated this example 😜. Glad you liked the video. Cheers

[@BuildSomethingAuto]

Very interesting content as always! Not very many people know about or use EDM machining it seems, but it's very useful for certain applications. Keep up the good work! 👍

[@ActionBOX]

Thank you, glad you enjoyed the video! Stay tuned, we’ve got some more exciting content coming 😎

[@1kreature]

Try using a tungsten electrode for welding as your EDM electrode.

[@ActionBOX]

Will do.

[@Raul28153]

I wonder what that arcing is doing to the spindle bearings?

[@ActionBOX]

Fair point. As mentioned in the video, the machine was scrap, and we did not care for the spindle nor bearing in it. Hope you enjoyed the video regardless. Cheers.

[@stevenhorgan8782]

keep these vidios coming lads great content 😬😬😬🤘 cnc lathe be nice 😁 just saying 😂

[@ActionBOX]

Awesome, Im so glad you like it. A CNC lathe has been on the radar for a while, and will happen eventually but I am actually working on something slightly more modern right now which has been consuming lots of my design time. I promise ill build a detailed lathe for you in the future though 😜. Thanks for watching Stephen. Cheers, Dave

[@stevenhorgan8782]

@@ActionBOX thanks dave cant wait 😅 is it a water jet cutter 🥰😬😂

[@Bigwingrider1800]

Doesn't the juice go thru the bearings (arcs the bearings) of the spindle with the connection in that position?

[@ActionBOX]

Yes. While stationary there is guaranteed one bearing ball contact between the two parts so it’s far less of a concern than if it were spinning, but of course it’s still bad. As mentioned in the video, this machine was to be scrapped so I didn’t care, but I do not recommend running your current through a spindle bearing. Cheers

[@researchandbuild1751]

What did you use for the electrical source?

[@ActionBOX]

I used a 75v 10khz power supply as seen at the end of the video. Cheers.

[@AdamEdington]

The black residue is your EDM swarf, can be magnetted out

[@ActionBOX]

Cool, I’ll give that a try.

[@i_might_be_lying]

Interesting results. Next video: "Abusing ER20 collets by putting weird and wonderful shit in them."

[@ActionBOX]

Hahahah this made my day. Thanks for an awesome comment and glad you liked the video. - dave

[@FilmFactry]

So you just use an Arc welder PSU?

[@fuckbitchesgehmoney]

So commercial EDC machines use a wire that they thread through constantly to get around the wear issue

[@ActionBOX]

Those are “wire EDM” machines which I started building. I’ll release the video in 2 weeks. Stay tuned 😉. Thanks for leaving a comment, and hope you are enjoying the content. Cheers, Dave

[@SpatialGuy77]

G'day guys, your electrode needs to be insulated!! (Obviously that ER20 is out of tolerance after u put hex bar in it, lol, but it looks like an old one anyways) Cheers, Michael 🇦🇺

[@ActionBOX]

Hi Michael, thanks for your input. We will do this properly in our V2 video. Cheers, Dave.

[@chrisadesigns]

Did you guys build another mill?

[@ActionBOX]

The mill in our EDM video is an older machine we built before building our latest one. Have you seen the latest machine video? Here’s the link: kzbin.info/www/bejne/fJyqlX2Di69kfMU

[@arabiccola]

What is this power supply you are using? Who makes it? And how much does it cost? Also how does it feedback the feed rate into the CNC system? So many questions.

[@fidelisconcurso5935]

I want to do something similar, what is the spechs of the Power Supply?

[@jeffreystoesser6878]

So, what's that doing to the spindle bearings ? Can't be good !

[@ActionBOX]

Great question Jeffrey, as mentioned in the video, the machine was to be tossed so that was not a major consideration. That being said, you are correct that it’s a terrible idea to run current through bearings on a machine that you care for. However, given that the bearings were not in motion during discharge, they were far less likely to be damaged. Hope you enjoyed the video regardless.

[@_P0tat07_]

Lol, we milled graphite on a milling machine in college for making our own EDM electrodes. We’re fine 🥴

[@ActionBOX]

Hahahah 😂

[@austinshupe9626]

You should make a bax wire edm

[@ActionBOX]

Working on it as we speak. Video coming out next weekend 😉.

[@Deutz-fahr-101]

The black residue is the burned or carved iron or whatever material your using particles

[@ActionBOX]

Good to know, thanks! That’s also consistent with what others were saying in the comments. Hope you enjoyed the video 😃

[@Deutz-fahr-101]

@@ActionBOX I definitely did and please make more of those videos

[@ActionBOX]

@@Deutz-fahr-101 we will. Already working in them. Please help us out in the meanwhile and share the video with anyone you know who may be interested. Cheers, Dave.

[@ramizkarakoyun7503]

How many Volts/Amps or watts was applied?

[@ActionBOX]

75volts at 10khz at about 1 amp on average.

[@sh_r9812]

How many volts? Is it DC voltage or AC? If so, what is the frequency?

[@ActionBOX]

Dc voltage square wave at 10khz

[@sharpworx]

Can you try 3D printing an electrode and then coating it in copper? I read an article about it and it apparently works.

[@ActionBOX]

Can you share the article. I’ll have a look. Cheers

[@robbiejames1540]

I think that works best for ECM (a similar process to EDM, but causes no tool wear) I suspect EDM would erode the copper coating away very fast.

[@sharpworx]

@@robbiejames1540 what is ecm?

[@robbiejames1540]

@@sharpworx ECM stands for electrochemical machining. Basically, from what I can tell, you put the conductive part and tool in a salt water solution (the salt is usually literally table salt, nothing fancy) and wire up DC to them - positive to the part, negative to the tool. As the tool gets closer to the part, metal atoms are ionized and fly off the part towards the tool - just as if you were electroplating the tool. But before they land on the tool and mess it up, the ions get intercepted by the chlorine in the salt and react, forming an insoluble solid that can then be washed away. The advantage it has over EDM is no tool wear, so you can use the same one forever. Disadvantages are difficulty flushing out the solid waste material and corrosion from the salty electrolyte.

[@gheumann]

WHAT WAS THE POWER SUPPLY???

[@ActionBOX]

It’s at the end of the video.

[@wktodd]

Spindle bearing ok?

[@johnmcnamara3719]

It will be when it is replaced!

[@ActionBOX]

Hahahah very true. I will tackle this problem in a future iteration, but for now I really wanted to show the functionality prior to innovating further. While I no longer need this anyways, I think the bearing should be fine for now as it was not spinning!?!? Thoughts? Thanks for watching in detail though Cheers, Dave.

[@wktodd]

@@ActionBOX spinning or not they'll be scrap!

[@ActionBOX]

@@wktodd Well, I guess its too late at this point 😜. I have no use for the entire machine so I was being more careless. It is a BT30 Spindle, and I run BT40 all around now. Im glad you watch the video in detail though, and I'll definitely fix this concern in a future iteration 😃. Thanks again for watching, and I hope you enjoyed the video regardless.

[@JinKee]

4:20 would a lab grown diamond electrode also work?

[@ActionBOX]

Hey awesome question. If it’s Boron-doped diamond then it should work, but I would have to brush up on my knowledge (and experience playing with diamonds 😅) to answer your question more fully. I love the question though hahaha. Cheers, Dave

[@Mr30friends]

It might, but what would be the point? Much more expensive, unmachinable, tiny, and it probably lasts the same as the dirt cheap graphite carbon. Dont forget to take proper respiratory protection measures if you machine carbon though.

[@ActionBOX]

@@Mr30friends true, but I don’t think diamond itself (aka pure diamond) is sufficiently conductive. I’m glad you mentioned the safety though, that’s very important for me. Thanks again for watching 😃

[@user-dl1te2pf2d]

Похоже ток шёл через подшипники шпинделя 😁

[@hansikabagga]

Could the next video be on making an industrial robotic arm? please🥲

[@ActionBOX]

I’ll look into it. Thanks for the idea. Cheers

[@smorrow]

Hmm... one-dimensional tool movement and a tub. So you could make one of these from a resin printer?

[@ActionBOX]

I’m theory yes, in practice, no. The axis of movement has to be very rigid and repeatable in movement. Resin printers (if you were to convert one) are not made to carry a heavy electrode while moving it up and down repeatably

[@GarageWorx]

The name for the black residue is called swarf.

[@ActionBOX]

That checks out via google. Thank you for the answer. Do you know how to filter it properly?

[@GarageWorx]

@@ActionBOX usually EDM machines have a filter pump that flows the oil or water thru the filters.

[@ActionBOX]

@@GarageWorx is it a specific type pre of filter?

[@GarageWorx]

@@ActionBOX for your application maybe a "big blue" filer set would work with some sort of small pump.

[@RocketGary]

Hi! What about pulse generator? Can you reveal it in the future video. Btw, try to use copper or graphite electrode. Brass is better for hole edm drilling.

[@ActionBOX]

Hey, great question. If you watch the video until the end you will notice that I show and mention it. Cheers Dave

[@far1002]

I’m guessing the black stuff is carbon u need to filter it some how I can’t believe this is that simple

[@ActionBOX]

Yeah I think you are right. Thanks for the insight and hope you enjoyed our video 😊

[@far1002]

@@ActionBOX thanks for the video 🙌🏿🙌🏿

[@floxmfpv5295]

The black stuff is the removed material

[@ActionBOX]

Makes sense. Thank you

[@MProper]

I guess it's not a good idea running the current thru the spindle bearings! :O :O :O

[@ActionBOX]

Fair point. as mentioned in the video, the machine was to be tossed so that was not a major consideration. That being said, you are correct that it’s a terrible idea to run current through bearings on a machine that you care for. However, given that the bearings were not in motion during discharge, they were far less likely to be damaged. Hope you enjoyed the video regardless.

[@TimSmith-vl4qk]

it still need filtering

[@ActionBOX]

Correct.

[@GuyFawkes911]

its black copperoxide

[@ActionBOX]

Thank you

[@proles101]

I'm sure you know this, but you need the filter your fluid or it will eventually become too conductive and just make a mess.

[@ActionBOX]

Yes, thank you still for the comment. It’s evident now that this is very important. I appreciate all the viewers sharing with us. Cheers.

[@austinshupe9626]

Also we call the black stuff swarf

[@ActionBOX]

Seems to be a common answer so you must be right 😃.

[@puzzled4163]

Why were you afraid of using graphite? The graphite would be submerged in deionized water, so there was very little chance of it getting into your lungs.

[@ActionBOX]

Good point. We were just trying to play it safe. Hope you enjoyed the video! 😃

[@gorancvetkovic1754]

yeah but making a tool/electrode out of graphite will make a big mess

[@puzzled4163]

@@gorancvetkovic1754 Try using a vacuum cleaner. If you are worried about making a mess than you should stay away from machining.

[@theGraphicAutist]

Ur pulse needs current protection

[@ActionBOX]

Seems to be a common comment so you must be right. Thank you for sharing

[@user-lw1ey8eo5b]

Круто.Так держать.С вами Україна.

[@ActionBOX]

Thanks

[@simonandreasen6958]

Could you consider trying making sink dies from 3d prints and electroplating them like this guy did kzbin.info/www/bejne/b4ucanp9m9Rqo9U I would imagine you could integrate water passage in the 3d prints to better purge the bi product

[@ActionBOX]

I’m not sure exactly what you mean. Can you clarify? Thanks.

[@simonandreasen6958]

@@ActionBOX I saw the guy electroplating 3d prints as seen in the video linked in the previous comment, and I thought it would make for an easy way of making tools for edm for less money, and enabling you to make more complex geometry than with conventional milling, or turning, and I imagened that you in theory could deposit a sufficient amount of copper or other metal on a 3d printed tool with electroplating. Another possible benefit of 3d printing the tool was to add internal water passage ways to better purge the iron oxide formed during the process, and better prevent a short between tool and work piece from happening. I hope I clarified it well enough

[@ActionBOX]

@@simonandreasen6958 that’s genius. I really like the concept. If you find a way to electroplated the resin prints then I would love to try this out on my machine.

[@simonandreasen6958]

@@ActionBOX electroplating resin prints shouldn't be any different from FDM prints, or anything else for that matter, as long as the surfaces are sanded, thoroughly cleaned, and coated with a electricly conductive paint or similar they should be fit for electroplating. I'm currently preparing for electroplating my own FDM 3d prints, but haven't tried it yet. I might make a video with my own results and reflections if that could help

[@ActionBOX]

@@simonandreasen6958 sure, please do share it with me. If it work then I’d love to use one of your covered prints in this EDM setup to see if it would work. Cheers.

[@iplikchi]

Probably you ruined yor spindle bearing

[@JAKWIRECUT]

wrong pulse

[@ActionBOX]

Can you elaborate?

[@JAKWIRECUT]

i have edm zink machine. can use smal spark and big spark. and pulse spark can change with elektrode use

[@SandeepKumar-jj7zi]

He must be an Indian, looking at gold chain..

[@ActionBOX]

Nope, we are not Indian. Good guess though 😉