Testing Vevor 800W EDM For Removing a Broken #4-40 Tap

Рет қаралды 6,478

Күн бұрын

Testing a Vevor 800W EDM machine designed for broken tap removal. There are several versions of this on Aliexpress and similar - my test part was simple enough to recreate, but wanted to know if in the future could have an easier way to remove a broken tap. In this case it broke off well inside the part because the upper half was a clearance hole, so removed from the "untapped" side instead (which wouldn't be possible with a normal tap remover).
0:00 - EDM Running
0:45 - Overview of Units and Parts
1:23 - User Manual
1:53 - Electrode Holder / Servo
2:44 - Removing Screws & Opening Main Unit
3:29 - Main PSU, "HF" Power
3:56 - Servo Driver Board
4:31 - Capacitors & Power Output Path
5:56 - Servo Driver Board Again
6:34 - Stepper Switch?
6:46 - Another Test EDM Run

Пікірлер: 20

@damienmiller Жыл бұрын

amazed that something so comically simple can work so well

@samykamkar Жыл бұрын

Awesome! What do you think the thinnest "wire" it can work with is, really what is the thinnest hole it can leave in metal?

@ColinOFlynn Жыл бұрын

The smallest it comes with is a 1 mm electrode which was the first one I used. They tell you to not let too much extend as it will jitter with smaller diameters, so it's probably more a mechanical limit on how small you can get & having enough rigidity. The design of this machine has a solid chuck so you can easily feed a narrow piece through, but it wouldn't take a lot to just make a custom head to make it easier to feed out a bit at a time. The included chuck goes down to 0.8mm (claimed, didn't test), so if you don't want to change anything that is basically your limit!

@samykamkar Жыл бұрын

@@ColinOFlynn Ahh, very cool, thanks!

@mirceagrau1568 2 ай бұрын

please tell me which electronic part generates the frequency pulse

@mirceagrau1568 2 ай бұрын

I studied many complicated electronic circuits on KZfaq and I don't understand much anymore

@mirceagrau1568 2 ай бұрын

you are a great guy, it would be nice if you could draw an electrical diagram

@NOBOX7 7 ай бұрын

how long did it take

@ColinOFlynn 7 ай бұрын

Pretty fast, less than 5mins maybe? Most of the time was setup, and in my case realizing I needed to run again with a larger electrode. But the actual EDM procedure was pretty fast.

@mansoor.mmannu3360 10 ай бұрын

Hai sir can share some more details about electronic pcb motor control section

@mansoor.mmannu3360 10 ай бұрын

4:08 please sir share more details about pcb

@robertomartin8731 Жыл бұрын

What's the power rating of the resistor?

@ColinOFlynn Жыл бұрын

Not sure - no markings on the resistor I could see, but with ~70V across it in theory you could dissipate 160W. They might have underrated it though since it's mostly pulses.

@jheissjr Жыл бұрын

How is the tap removed after it has the hole?

@ColinOFlynn Жыл бұрын

If the hole is big enough (why I needed to redo it with the larger electrode!) the tap should just kinda crumble out when you hit it. Basically you try to drill out the center part of the tap (at least with small taps, with larger taps can try to drill out one of the side flutes).

@jheissjr Жыл бұрын

So a hole is drill/EDM'ed big enough to disconnect the tap flutes from the center. Neat!