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Thread: VFD outputs

  1. #31
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    I installed one of the Folinn VFD’s from them recently on a mate’s Brobo saw.
    Nice and easy, manual was great.

    Steve

  2. #32
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    Geez must of been a doozie of a saw!!

  3. #33
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    That last comment was pretty dumb on my part , of course most industrial type cold saws would probably be 3 PH.

  4. #34
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    I have a Folinn VFD from Conon Motor on my lathe. Happy with the VFD and their service. The manual is very extensive, but I did find myself bouncing back and forth between sections at times trying to get my head around what some of the parameters were for (hint- you only need to fiddle with about 10% of them).
    Chris

  5. #35
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    If you had a 2.5kW drive connected to a 1kW motor (assuming the drive is set up correctly) and it’s still going out on over current, I would suggest there’s a problem with the movement of the knee assembly.

  6. #36
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    Just confirming VFD`s on hand won't even try to start motor in Delta 230v The motor is unloaded on start up and engaged mechanically

  7. #37
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by jcatcmc View Post
    Just confirming VFD`s on hand won't even try to start motor in Delta 230v The motor is unloaded on start up and engaged mechanically
    Can you post a photo of the open motor junction box.

  8. #38
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    Quote Originally Posted by jcatcmc View Post
    Just confirming VFD`s on hand won't even try to start motor in Delta 230v The motor is unloaded on start up and engaged mechanically
    Just to eliminate any confusion on my part is the VFD always connected to the motor and then the start command given, and the drive trips, or is the VFD started, ramp completed and then some time later the motor is connected via a contactor or switch, tripping the drive.

    John

  9. #39
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    Quote Originally Posted by jcatcmc View Post
    Just confirming VFD`s on hand won't even try to start motor in Delta 230v The motor is unloaded on start up and engaged mechanically
    If I'm reading this right, your 2.5kW VFD won't start an unloaded 1kW motor?
    Chris

  10. #40
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    Two VFDs won’t start an unloaded motor says you’ve got a problem with the motor. If you converted it from star to delta, that would be where I would start looking. The over current condition suggests to me you likely have the windings either out of sequence or one of them reversed.

  11. #41
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    Probably not much use Bob as I have already removed the star connection links and pulled another 3 cables through the machine to make star point in control box at the moment all connections are hanging in the breeze labeled U1. U2 V1 V2. W1 W2. this is all prior to making a decision to the path ahead . ( more enhanced unit or star/ delta start it , nothing ventured nothing gained. )

    For, Guzzjohn. Motor is cconnected to VFD 230 v Delta , The set frequency is flashing , the remote start signal to VFD is closed , instant over current message , end of story/. Star connected no worries.

    For Jack620. Same scenario. 2.5 or 1.5. KW VFD they are both the same brand both lacking parameter inputs regarding motor current

    For racing tadpole . I doubt it . I have paired up the individual windings more than once.

    The motor is rated 220 volt delta 5 amps . When I have successfully started it Star/ Delta run amps is about 4.8 A maximum load.




    IMG_20200829_193440990_HDR.jpgIMG_20200829_193139392.jpgIMG_20200829_193932646_HDR.jpgfullsizeoutput_51.jpg The last photo shows my star/ delta start setup I won't bore you with how it works but it does.

  12. #42
    BobL is offline Member: Blue and white apron brigade
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    I agree with racingtadpole

    If the motor runs on Y but not on ∆ then the pairing up of the motor wires sounds like the place to look

    I suggest forgetting the Y/∆ switch for the mo - too many wires to get angle up with just practice getting the connections right in the motor connection box first

  13. #43
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    Quote Originally Posted by jcatcmc View Post

    For, Guzzjohn. Motor is cconnected to VFD 230 v Delta , The set frequency is flashing , the remote start signal to VFD is closed , instant over current message , end of story/. Star connected no worries.


    .
    Thanks for the update. Some other suggestion- I think you said the motor runs ok mechanically unloaded in delta.
    If you set a ramp of say 10 seconds does the motor actually accelerate steadily over this time or does to jump straight to full speed.
    The other test would be to set the max speed to about 10Hz. Confirm the motor is running slowly in delta unloaded then try under load.

    John

  14. #44
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    While not being infallible and I don't think dementia an issue yet I have been `practicing` since 1969

  15. #45
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    And yet you still can't make it work. People with knowledge about these things (and I don't include myself) are telling you there's something wrong with your motor's wiring. You seem strangely resistant to that possibility.
    Chris

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