Thread: Converting a DM45 Mill to 3phase EVS

Originally Posted by Big Shed

Now I will be looking for a good 1.5Kw VFD to drive this and would like to hear from people that have recently bought one of these.

Given the price, I reckon its hard to go past the Huanyang drives (I believe Ray is running a number of these on his surface grinder?) The seller I bought mine from (lovehappyshopping) is no longer registered on Ebay, and prices seem to have taken a slight rise as a result (although still cheaper than when I bought mine). The seller below may even be the same guy under a different name, the actual listing text seems the same, and I have a feeling my sellers 'real' name was Amon.

VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW 7A | eBay

And since it says 'or best offer', I'd probably even try my luck at $120-130. Good chance it will be accepted by a Hong Kong based seller.

Yep, have that one in my watch list. Not sure about the various features of these drives.

In this thread, another VFD (SAJ) is discussed as having vector control. Not sure what that means, but is also in my watch list.

Don't mind spending a bit extra if that gives better performance.

Have just ordered this book to hopefully help with some of the technical details.

Hi Bigshed,

Don't take it as a complete recommendation, but I've got 6 of those Huanyang drives, and no problems with any of them. But it's early days, I haven't had them long enough to say how they will perform over the long haul. The guys who are using them for high speed spindle drives on CNC routers have been using them a lot longer and they seem happy enough.

A couple of buying tips, search ebay and find a store that's selling them, go to the store, then specify sort by lowest price + postage, there is a lot of variation in price and postage.

Here's one VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW k8 | eBay

Regards
Ray

PS. Vector control is better, than V/F, you get more torque at low revs, but costs more.

Fred, given that you're using the same sized motor, it might be worth spending a bit more on a vector drive. Just what I've read. I used a cheap V/F drive but doubled the motor size to compensate.

Originally Posted by RayG

Hi Bigshed,

Don't take it as a complete recommendation, but I've got 6 of those Huanyang drives, and no problems with any of them. But it's early days, I haven't had them long enough to say how they will perform over the long haul. The guys who are using them for high speed spindle drives on CNC routers have been using them a lot longer and they seem happy enough.

A couple of buying tips, search ebay and find a store that's selling them, go to the store, then specify sort by lowest price + postage, there is a lot of variation in price and postage.

Here's one VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW k8 | eBay

Regards
Ray

PS. Vector control is better, than V/F, you get more torque at low revs, but costs more.

Good find on that one Ray - incidentally, did you have to look on EbayUS to find that one? It won't come up for me if I search on Ebay Australia, I was wondering why the prices seemed to have gone up, since I thought they were down to the price of the one you linked...

Fred,
I have the full manual for this VFD. I got it from the manufacturer in 'Word' format - in 'Chinglish'. I have edited a little (vocab) here and there to make it readable, and formatted some of the tables so that related rows lined up with each other....
You still need to work hard not to shake you head, but the formatting was so clumsy I can't make it look at better - and lost enthusiasm for the tedius task of spell checking, grammar correction etc once I read it often enough to understand it all.
The manufacturer now distributes MY version - without ever asking or corresponding with me! Cheeky bastards.....

Also: the 'Word' version does not have the error codes section in it (althought the table of contents does). I never got that in editable format.
However, it IS in the pdf version of it here: http://www.keepandshare.com/doc/2971...m-8-6-meg?da=y

You can download the Word at: http://www.keepandshare.com/doc/2971...m-4-5-meg?da=y
Cheers,
Joe

Originally Posted by RayG

Hi Bigshed,

Don't take it as a complete recommendation, but I've got 6 of those Huanyang drives, and no problems with any of them. But it's early days, I haven't had them long enough to say how they will perform over the long haul. The guys who are using them for high speed spindle drives on CNC routers have been using them a lot longer and they seem happy enough.

A couple of buying tips, search ebay and find a store that's selling them, go to the store, then specify sort by lowest price + postage, there is a lot of variation in price and postage.

Here's one VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW k8 | eBay

Regards
Ray

PS. Vector control is better, than V/F, you get more torque at low revs, but costs more.

Thanks Ray, I hadn't found one that cheap, that's a good buy.

I was about to ask whether spending the extra for vector control was worth it, when Bryan posted this.

Originally Posted by Bryan

Fred, given that you're using the same sized motor, it might be worth spending a bit more on a vector drive. Just what I've read. I used a cheap V/F drive but doubled the motor size to compensate.

Thanks Bryan, you saved me asking the question. Given that I getting a very good deal on the motor I may well decide to spend extra on the vector control feature.

Originally Posted by Jekyll and Hyde

Good find on that one Ray - incidentally, did you have to look on EbayUS to find that one? It won't come up for me if I search on Ebay Australia, I was wondering why the prices seemed to have gone up, since I thought they were down to the price of the one you linked...

Yes, I know I'm quoting myself But turns out I could answer my own question - searched on Ebay US and came up with the same price, but also free shipping! And with the 'make an offer' option, you could get a 2hp VFD delivered for $100 flat - that's value I reckon!

VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW j4 | eBay

Originally Posted by jhovel

Fred,
I have the full manual for this VFD. I got it from the manufacturer in 'Word' format - in 'Chinglish'. I have edited a little (vocab) here and there to make it readable, and formatted some of the tables so that related rows lined up with each other....
You still need to work hard not to shake you head, but the formatting was so clumsy I can't make it look at better - and lost enthusiasm for the tedius task of spell checking, grammar correction etc once I read it often enough to understand it all.
The manufacturer now distributes MY version - without ever asking or corresponding with me! Cheeky bastards.....

You can download it at: VFDManual.doc -- February 13, 2011 7:35 pm -- 4.5 meg

Cheers,
Joe

Thanks for that Joe, bit of light bedtime reading there

Originally Posted by Jekyll and Hyde

Yes, I know I'm quoting myself But turns out I could answer my own question - searched on Ebay US and came up with the same price, but also free shipping! And with the 'make an offer' option, you could get a 2hp VFD delivered for $100 flat - that's value I reckon!

VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW j4 | eBay

Hi J&H,

There seems to be a number of sellers, different names, identical descriptions, some claiming to be shipping from different places. Wouldn't surprise me to find they are all the same company.

In answer to your earlier question, I just searched ebay australia for "VFD 2HP" and "VFD 1.5KW"

Regards
Ray

I have both the Huanyang and SAJ 1.5 kW units but I haven't hooked up the Huanyang unit to anything permanent yet. In terms of build quality the SAJ definitely looks like a better quality unit.

Picked my motor yesterday, picked up a foot mount one as well, and before buying a VFD I thought I would get a handle on vector control VFDs.

Found this link interesting

What is Vector Control in a VFD? - Electric motors, generators & controls engineering FAQ - Eng-Tips

and this one

http://www.inverter-china.com/blog/a...-VFD-work.html

Starting to think that spending a bit extra, at least for my mill application, would be a good idea.

Hi Fred,

Thanks for those link, makes for good reading. I'm using a TECO V/F drive on the mill, and as long as you don't try and do heavy milling at low Hz it's fine. When I need the torque at low Hz I still change belts. Having a vector drive would probably save those belt changes.

But just having a VFD (of any sort) drops the belt changes to the point where I can't remember where I put the the spanner to change the belts.

Regards
Ray

One good thing about my mill is that it doesn't have belt changes. Just one lever for H/L range and another for 3 speeds within those ranges.