No-Name YL620-A VFD

That is all labels on case

Hey David,

Hah! I suspected that. No manufacturer.

I don’t think Yuyong industry is the manufacturer of these devices. They once sold them, but apparently no longer at the moment. At least not individually.

Thank you very much, that’s very kind of you!

Are you sure you want all 32 pages. I don’t have scanner but could take photos like the two above.
I would be glad to sell you the paperwork and the unit for $50. In original packaging never used beyond trying unsuccessfully to set it up. I sure due to my lack of knowledge and patience.

I did not mean that I would not photo if you want, glad to do it if it helps.

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Hey David, hey all,

my motivation is, I’m so sorry when people don’t get their VFD to work.

But this brings me into a dichotomy: In my opinion everyone should buy serious, good, and reliable hardware, especially when it comes to security (currents greater than a few amperes can burn down your place, especially if you then also solder the spindle connector instead of crimping). When I help people get their Huanyang, YL620, H100 or other Aliexpress Noname VFD set up and running, then they are happy and I am happy because they can do CNC Milling too.

But on the other hand, by doing that, I also support that these devices are manufactured and bought. And I don’t really want that!

If someone would ask me “Should I buy this chinese VFD that is under $ 150?”, usually I would say “Better not!”. I would say “Try to buy an Omron MX2 or a Hitachi WJ200.

But what I am talking about is that it’s not only the question whether a cheap VFD is serious, good or reliable hardware, and will work and not fail, and not burn down your workshop. It’s also that a quite complicated hardware like a VFD is not a good hardware if it comes without good documentation. The higher price is justified by the fact that it costs money to write a good manual on a high technical and linguistic level, and this in many languages, namely in english, french, german, czech, spanish, italian, polish, and russian.

If people did that and bought one of these instead of buying the cheapest available VFDs, then there would be much less need for the problem that people have, namely that when they read this chinese manual junk, it doesn’t say how a VFD works, how to set it up, and what all these settings really mean. :frowning:

On the other hand, if you buy an Omron MX2 or a Hitachi WJ200, you get a manual that’s 418 pages / 420 pages long. And in this, the author not only has an idea of ​​the language in which he writes :slight_smile:, but he is also trained to write a technical document, and in an easily understandable language. And in there you can find what is missing in the cheap chinese manuals: For example, “What is a VFD? Introduction to a VFD.” Or “Frequently asked questions” right at the beginning. There are also precise instructions for a first test run. And all important parameters that must be set are presented and explained.

Also, it is practically inconceivable that after reading one of those cheap chinese manuals someone would understand how to set the parameters for the V/F algorithm. Or at least what it is :slight_smile:.

  • What is a VFD?
    Introduction to a VFD.
  • Frequently asked Questions.
  • Prepare for wiring.
  • Determining Wire and Fuse Sizes
  • Terminal Dimensions and Torque Specs
  • Wire to the mains and to additional accessories.
  • Wire the inverter output to the motor
  • Ground Terminal
  • Preparations for commissioning.
  • Power on test
  • Instructions for menu navigation.
  • Mandatory settings before first test run.
  • First test run.
  • Evaluation of the first test run.

Some things that are missing in the “manuals” of the cheap chinese devices.

And that’s why people have often asked, “Can you help me to set my Huanyang, YL620, H-100 or Aliexpress Noname”? But no one asks, “Can you help me set up my Omron or Hitachi?” Why should they? They have a good manual. In contrast, with these cheap manuals that are included with the cheap chinese VFDs, you really have to say:

RTFM doesn’t always help!

Hey David,

please forgive my soap-box speech! :slight_smile: Back to your question, I really want to be able to help people, but I don’t know if I would go as far as buying these things that people need help with and that you can’t get to work without help (and which I advise against buying). But I think that if you can read everywhere that nobody can get it working, you will not get rid of your device, but if people get it working and report about it here, then you will be more likely to get rid of your device. I really would enjoy if someone would report that with the help of some people here they get it to work. And then maybe we will achieve that somebody will buy your VFD then! It would be too sad that it could work and never does.

Maybe if you photograph the manual, maybe it can help. I’m not sure if it will, but the YL620-A manual mentioned above seems to be flawed and incomplete (cell phone photos would be great).

PS: I see no news from Rick and Luis. Will they have success?

Hey David,

that is so nice of you.

Hey all,

just for the record:

By virtue of my title as Regular I hereby change the title of this thread from “Yuyong industry yl-620a” to “YL620-A”. EDIT: This is too short, discourse.org Forum Software refuses it, so I use “No-Name YL620-A VFD” :slight_smile:

Reasons:

  1. I don’t think Yuyong industry is the manufacturer of these devices. They once sold them, but apparently no longer at the moment. At least not individually.
  2. The device writes “YL620-A” and not “yl-620a”.











![image|666x500](upload://v1

CJeZNv1WXI6OwOcMfUBsCun4P.jpeg)




![image|666x500](upload://HP

fmNOqI8wiyGSsvEXEI5jNqSI.jpeg)

That is everything
I really hope it helps
Thank you for such a complete response amazing job

Hey David,

Repairing this was possible by hitting “quote” and putting the broken string together!:


Hey David,

Thank you so much! I will download them and I will see if I find something that helps and that we’ve overseen.

It looks like I need to take a photo of 32 and 33 again when I get back to the shop . So sorry about the poor quality of photos. I hope they help if you need so reshot just holler.
Dave

Hey David,

well we don’t have to win an art award :slight_smile: I can read everything but if you’re at it, pages 10 and 12 with the picture descriptions are a little unsharp. Thank you again!

I will show you when I will have transformed it into a single file.

Hey Gary,

this is a YL620-A manual from bulkman3d.com that I know but I did not use or cite from it since it neither seems to be original nor, as we have seen above, is identical to one printed that is delivered with a VFD.

As you can see, there are many modifications on that manual, first of all there is a column with user settings on the right that seems to fit a bundle offered. Some words are higlighted also.

On the other side, if you look at Dave’s photos, look at page 2 “Simple parameter setting” with three columns on the right for three possible user settings. This is an example for something missing on the version you mention.

Or look at parameter P00.16. Where are the explanations for 8.) like you can see it in the YL620-A Manual available at buildbotics.com on page 14? Also where are the explanations for P00.17-P00.20? There the bulkman3d.com version shows just a “##############”. So you see, this can be no reliable source, it’s not original nor do I know anything about the modifications.

@Aiph5u deleted post to avoid confusion :grimacing:



Ok.
I think you have it now, if not just ask I will keep the manual out for a couple days. I really hope this is helping.you ROCK!!

Hey David,

unfortunately it is a bit difficult though. Usually I’m used to pull very good quality out of everything, but it’s only when adjusting curves that I see that your JPEG compression artefacts are too high to easily read the letters in the table’s heading column with the dark background:

But don’t worry now, I think I can read enough information to get an idea and try to find out which options we need or correspond to other VFDs I know. It’s just that we would need better quality to show it to others.

But as long as Luis or the original poster do not reply, we shouldn’t be driving ourselves crazy.

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The manual I am photographing is like that dark background and very difficult to read first hand .I’m sure the photos don’t improve on that problem
Thank for everything
Dave

Hey David,

Yes, the manual is really not ideal in terms of design and grayscale, that’s obvious.

In fact the device you use creates strong JPEG Compression artifacts. Usually phones do that since they make images that can be sent through the net so they use lossy compression. I don’t know which device you use but it’s probable that you can not alter this. A little more artificial light would have made contrast better.

Usually I would say send me the manual since I have a good scanner but it is clear you won’t and shouldn’t separate the manual from the device since it’s new an has its value only with the original manual!

Anyway don’t worry! I will try to read it like it is. I have the above PDF from buildbotics for comparison so I will only need to find differences between the two.