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  1. #1
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    Aug 2009
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    Lake Macquarie
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    Default Fitting VFD to Craftsman Lathe

    Have any members fitted a VFD to their Hercus lathe, if so I need your help as I am a
    complete newbie with electronics.

    I have a Reliance GV3000/SE 3HP VFD and want to fit it to my Hercus Craftsman Lathe.

    The lathe has a 3/4 HP 3 phase motor controlled by a push button starter with overload control
    linked to a forward/reverse switch.

    Should I connect the VFD directly to the motor or use the existing connection through the
    push button starter.

    Also, where should set the 5 step pulley speed High,Mid or Low range.

    I have managed to get it working by connecting it to an old 3 phase bench drill and changed the parameters, getting it to rotate, forward and back, jog and increase/decrease spindle speed etc but those are the easy bits.

    Thanks

    Col

    P.s. Many more questions to follow

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  3. #2
    Join Date
    Nov 2008
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    Perth WA
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    Default

    Col,

    Posting this in the Metalwork forum will provide greater exposure and more chance of a reply.

    Bob.

  4. #3
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    Default

    Hello Bob,

    Thanks for the hint.

    Col

  5. #4
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    Mar 2009
    Location
    Melbourne
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    Default

    G'day Col,
    Are you using the VFD to run your lathe from 240V or do you have 3 phase and just want the variable speed capeability?
    The reason I ask is if you wish to run your lathe from 240 you will need to confirm your motor can be configured to run this way as 3 phase motors are generally wired to run from 415V.
    As for connecting it up, the VFD must be connected directly to the motor and the contactor connected between the supply and VFD. VFD's do not like to be disconnected from the load when they are running as this will let the smoke out.

    Generally the programming of the VFD is the fidliest part as it will need to be parameterised to match your motor or at best your motor will run very ineffeciently and at worst you will let the smoke out of your VFD.
    If you have the manual for your VFD it will generally have basic setup and wiring instructions, if you don't have a manual try googling the part numbers as they can usually be downloaded from the manufacturer.
    If you need any more detailed assistance feel free sing out.
    Cheers,
    Greg.

  6. #5
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    Default

    Hello Greg

    Quote
    Are you using the VFD to run your lathe from 240V or do you have 3 phase and just want the variable speed capeability?
    The reason I ask is if you wish to run your lathe from 240 you will need to confirm your motor can be configured to run this way as 3 phase motors are generally wired to run from 415V.

    Thanks for your help.
    I have a 3 phase supply into my garage and run the Hercus lathe and drill from it and I will connect the VFD directly to the Hercus motor.
    The speed control on the VFD keypad needs some improvement so I plan to use a remote with a small handwheel or star knob. Any ideas what I need to make one.
    The manual downloaded from Reliance shows the connections but I have no idea what type of pot I need.
    Thanks again
    Col

  7. #6
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    Mar 2009
    Location
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    Default

    G'day Col,
    I had a look at the manual from the following link:

    http://www.reliance.com/pdf/drives/i...als/D23360.pdf

    On page 65 is a diagram for 3 wire start stop control wiring. I used 3 wire start stop control as this lets you have seperate start & stop buttons. If you want to have a single on off switch you can use the two wire start stop control wiring diagram on page 64.
    Both of these diagrams show a 5kohm pot for voltage referenced speed control (connected across terminals 12,13 & 15) but I suspect this would be the minimum required value and you could use a 10k pot if you like and it would work the same.
    The main thing is to be sure to buy a linear pot so the speed control is even across the range, if you get a logarithmic pot (the type used for volume control) you will have fine speed control at one end and not very much at the other end of the knobs travel.
    You can get the pot from Jaycar, Dick Smith or any other electronics hobby shop and it should cost less than a dollar.
    Cheers,
    Greg.

  8. #7
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    Default

    Hello Greg,
    Bought a 10K linear pot, control knob and other bits from Jaycar today and will put it together tomorrow.
    The separate stop/start will be on hold until I understand the rest.
    The VFD is connected and the spindle rotates forward and reverse, and slows/increases magically. Need to understand the parameter settings.
    The manual and others on the Baldor/Reliance site are very informative, particularly for an electronically challenged senior citizen.
    The big test tomorrow...Engage cutting tool with workpiece!!!!

    Thanks again
    Col

  9. #8
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    Default

    Quote Originally Posted by kwijibo99 View Post
    G'day Col,
    I had a look at the manual from the following link:

    http://www.reliance.com/pdf/drives/i...als/D23360.pdf

    On page 65 is a diagram for 3 wire start stop control wiring. I used 3 wire start stop control as this lets you have seperate start & stop buttons. If you want to have a single on off switch you can use the two wire start stop control wiring diagram on page 64.
    Both of these diagrams show a 5kohm pot for voltage referenced speed control (connected across terminals 12,13 & 15) but I suspect this would be the minimum required value and you could use a 10k pot if you like and it would work the same.
    The main thing is to be sure to buy a linear pot so the speed control is even across the range, if you get a logarithmic pot (the type used for volume control) you will have fine speed control at one end and not very much at the other end of the knobs travel.
    You can get the pot from Jaycar, Dick Smith or any other electronics hobby shop and it should cost less than a dollar.
    Cheers,
    Greg.
    Hello Greg,
    I'm in need of your help again
    I followed your advice and used the 3 wire start/stop control and all works well, starting/stopping, Fwd/Rev but I cannot get the 5k pot to work.
    The speed remains at the start up value and will not increase or decrease.
    I downloaded
    http://www.reliance.com/pdf/drives/i...als/D23391.pdf
    Appendix G to try to solve it.
    I guess it is one or two parameters that I need to reset.
    Do you have any tips?
    Cheers
    Col

  10. #9
    Join Date
    Jul 2010
    Location
    Melbourne
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    Default

    Hi Col,
    What setting do you have for P.000?
    Stuart

    p.s. bare in mind I dont have this sort of VSD, I'm just reading the manual

  11. #10
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    Default

    Quote Originally Posted by Stustoys View Post
    Hi Col,
    What setting do you have for P.000?
    Stuart
    p.s. bare in mind I dont have this sort of VSD, I'm just reading the manual
    Hello Stuart
    P.000 is set to REMOTE (rE). As I understand (with my very limited VSD knowledge) the P.000 LOCAL setting is used for the keypad entry.
    I also tried various combinations of P.007(currently 0), P.008(currently 0) and P.009(currently 0)

    Thanks for your help
    Col

  12. #11
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    Default

    You're welcome, but I havent been much help so far
    You are using terminals 12,13,15? with the center leg of the pot going to 13?
    Stuart

  13. #12
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    Default

    Quote Originally Posted by Stustoys View Post
    You're welcome, but I havent been much help so far
    You are using terminals 12,13,15? with the center leg of the pot going to 13?
    Stuart
    Yes and have tested the pot.Seems OK.

    Col

  14. #13
    Join Date
    Oct 2010
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    melbourne, laverton
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    Default good luck

    hi i was always under the impresion that motor drive were very expensive.
    maybe its just the siemens ones. roughly how much does one of these
    small ones cost. for example 1 hp.

  15. #14
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    Default

    Quote Originally Posted by azzrock View Post
    hi i was always under the impresion that motor drive were very expensive.
    maybe its just the siemens ones. roughly how much does one of these
    small ones cost. for example 1 hp.
    Hello Azzrock
    The Chinese ones are relatively cheap but I have no idea of the quality.
    My Reliance GV3000/se 3HP 3 phase 415V is 5 years old and was good value if You know how to set it up..which I have some difficulty.
    New ones of Siemens quality are expensive.
    Try this one:
    Telemecanique ALTIVAR 28 415v .75kw VSD AC VECTOR DRIVE (eBay item 200603925459 end time 09-May-11 15:49:50 AEST) : Industrial

    It beats changing pulley speeds.
    Regards
    Col

  16. #15
    Join Date
    Nov 2006
    Location
    Heidelberg, Victoria
    Age
    79
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    2,251

    Default

    Azzrock.

    Some of the Chiawanese VFD's are really cheap, around $70. Can't vouch for quality.

    VARIABLE FREQUENCY DRIVE INVERTER VFD NEW 2HP 1.5KW 7A (eBay item 180515678895 end time 29-May-11 03:12:25 AEST) : Business Industrial

    I paid over $500 for mine with remote pod, but its a special from Drives Direct, not your standard unit.

    Ken

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