Greenie problems configuring 6i25 with 7i77, using Granite Devices VSD-E drives

Well, I took the VFD apart and I didn't have any luck. It is all conformal coated and I couldn't find any indication of damage to the board or components thereon. Because the display and logic side of things are all low voltage, I looked for a regulator with the hope that it might be bad. I know it is there someplace, or a SMPS, but I didn't see any likely candidates. I also could not find any fuses. Sometimes these can be a little harder to find, but I checked both the components and the legends; I found nothing that was of particular interest.

I think this is one VFD that has flown the coop.

DeckelHead wrote: I looked for a regulator with the hope that it might be bad. I know it is there someplace

Are there any chips with a bigger than expected gap between pins?
uk.rs-online.com/web/p/buck-converters/5254167/
(That's an AC input one, but shows the unusual pin layout)

No eBay APP ID and/or Cert ID defined in Kunena configurationI'll take a look this evening. This is a GE AF300 (E$, I believe, but I'm at work right now so I cannot confirm) 3HP unit. It is very similar, if not identical to this (edit: well, no... this is a 380V unit and I'm running 220V single phase input):



I'm not sure when it died on me because it is in a different cabinet. Internally there are several boards. The capacitor one is a no brainer. Then there are two control boards, each of which have components on both sides. The boards are stacked (no surprise there) with pins connecting them. The rear board has the large SCRs and a transformer on the rear. That is probably where the SMPS is located. I'll investigate that a little more carefully.

Alan

It's probably too old to use a high-voltage regulator like I linked to. If there is a transformer on the back then that sounds like an SMPS, as you say.

I guess you can check the input and output sides of that?

I only had a limited amount of time last night to pull the VFD apart. Definitely no high voltage regulator. There are two transformers, one very small (maybe 10mm square) that has a primary and a secondary. The second one is about 30mm square and has a plethora of windings on it. Everything is conformal coated so it is fairly difficult to work on. Given that I don't have any indication that the drive "on", however, I am thinking that something is amiss with the SMPS. I'd expect the display to come on otherwise.

I've been running this in a phase converter mode previously. The machine was an operable Hurco when I yanked the control out of it, but then it sat for a few years. I don't really see a failure case that I could have introduced that would screw up the SMPS, so I'm thinking my present state is just bad luck/timing. Working with a full VFD in a disassembled state will be difficult, especially since the PS is on the backside of everything. I think I'll try a few quick things.

1. With it fully assembled, I will try a full 3 phase input power. If it suddenly works, then I know that one of the input diodes is a problem and I can just work through which one (or check it with a voltmeter)... Hmmm, probably easier to do that right now without any power!
2. If there is no love there, I can just work with the power board briefly and see if I can trace down where in the SMPS I have a faulty component

I don't know how long I want to spend on this though as it is a detractor of precious time and I don't want to become side-tracked. I can always buy a Huanyang 2.2kw VFD for about $130 and be done with it. From what I understand, this is a little better now if you can figure out the Chinglish manual. I know everything is made in China now, but it isn't all made equally. I'm a little leery of buying the lowest priced 2.2kw VFD off of ebay when the description is not even very readable. I'm no fool, though. I know all the VFDs, even those from AB, are made in China. But most western brands do a decent job of QC validation to ensure the stuff is decently made. I've got a whole lot more concern about stuff made for a Chinese company. Been there, done that and very often with poor results.

So, we'll see... I'm a bit nervous about the Huanyang but maybe it is worth a shot....

DeckelHead wrote: So, we'll see... I'm a bit nervous about the Huanyang but maybe it is worth a shot....

Mine has been fine. Make sure you get a real one and not a fake one (Perhaps the fact that fake Huanyang drives exist is a good sign?) as the clones don't have ModBus.

Well, technically, the HY ones don't have Modbus, just something a bit like ModBus, but LinuxCNC has a specific driver.