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  1. #1
    Join Date
    Apr 2006
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    Default VFD / VSD selection help

    I am about ready to buy a VFD to fit to my lathe. I have a 1.5 hp 3ph motor, and was looking at these vfd's on ebay.
    I want one with vector control, for more constant torque.

    Does anyone have an opinion which of these would be better or can recommend a similarly priced alternative .

    BobL has one of these first ones, so I know they work at least.

    SAJ 1.5KW VSD VFD inverter 240V variable speed drive | eBay

    1.5KW (2HP) single to 3 phase VFD Variable SpeedDrive | eBay

    The SAJ has 12 months warranty, where the 2nd one only has 6 months.
    I am leaning towards the SAJ at the moment.

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  3. #2
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    Default

    Hi Ironwood,

    It's difficult to see much difference between them, the SAJ is a bit cheaper, and looks like the control panel can be remotely mounted.

    +1 vote for the SAJ, but see what BobL has to say about his.

    Regards
    Ray

  4. #3
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    Thanks Ray.
    I phoned the guy selling the second one to ask about warranty, as it wasnt mentioned on the ebay ad. He went on about me being protected by ebay etc. but said he would give 6 months warranty.

    The SAJ being 12 months has me feeling slightly better about it. And the fact that Bobl has one already that he has up and running.

  5. #4
    Join Date
    Feb 2006
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    Quote Originally Posted by Ironwood View Post
    Thanks Ray.
    I phoned the guy selling the second one to ask about warranty, as it wasnt mentioned on the ebay ad. He went on about me being protected by ebay etc. but said he would give 6 months warranty.

    The SAJ being 12 months has me feeling slightly better about it. And the fact that Bobl has one already that he has up and running.
    I have been away for 6 weeks, first thing I did when I came back was fired it up - yep all still good. Front panel being immediately relocatable is good although the other looks like it can also do that.

  6. #5
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    Quote Originally Posted by BobL View Post
    I have been away for 6 weeks, first thing I did when I came back was fired it up - yep all still good. Front panel being immediately relocatable is good although the other looks like it can also do that.

    Thanks Bobl, I think I will go with the SAJ, as I cant see any advantage of the other one over it, that and the lower price and better warranty, looks like a winner to me.

    Have you loaded yours up with any heavy cuts yet to see how it goes ?

  7. #6
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    Quote Originally Posted by Ironwood View Post
    Thanks Bobl, I think I will go with the SAJ, as I cant see any advantage of the other one over it, that and the lower price and better warranty, looks like a winner to me.

    Have you loaded yours up with any heavy cuts yet to see how it goes ?
    I haven't tried any heavy cuts. I also only have a 240 V input supply and a 3/4HP motor on my lathe so it's probably less VSD and more motor limited. I tend to use the VSD between about 30 and 70 Hz as the motor is relatively easy to stall at low (< 10 Hz) frequencies.

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