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Replacement motor for Enco RF-30

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  • Steve M
    I bought an Enco branded RF-30 style mill from the original owner. Motor has a manufacture date of 1987. Machine is in great condition minus the burned up
    Message 1 of 38 , Nov 6, 2013
      I bought an Enco branded RF-30 style mill from the original owner. Motor has a manufacture date of 1987. Machine is in great condition minus the burned up motor. I'm having a time of it trying to sort out what frame/mount would be best for a replacement. I understand I'll have to address the odd ball pulley bore when I get to that part of this.

      Was thinking I'd like a good quality 2HP 3 phase motor for use with a VFD.

      Any input much appreciated. I've searched all over the place with little specifics coming up.

    • Steve M
      I bought a braking resistor. I don t think the mill needs it. It would be really helpful on a bandsaw to help with the inertia. A VFD adds a lot more than just
      Message 38 of 38 , Nov 16, 2013
        I bought a braking resistor. I don't think the mill needs it. It would be really helpful on a bandsaw to help with the inertia. A VFD adds a lot more than just variable speed. You get low voltage controls and braking as well. 

        I'm making a small control panel to run the VFD. I'll post photos when it is finished. 

        160 Bluffs Ct.
        Canton GA 30114
        United States

        Bill To

        Date 11/11/2013
        Sale # 
        Payment Method 
        Check #  
        Start Date  
        End Date  
        Shipper No.  
        Purchase Order #  
        Created From 
        Shipping Method UPS Ground
        Tracking # 5
        Customer Phone 

        ItemQuantityUnitsSerial/Lot NumbersDescriptionRateOptionsTaxAmount
        DBR-2002-C1  TECO Dynamic Brake Resistor, 230V, 2HP **JNBR-150W100**20.00 Yes20.00
        FM50-202-C1  TECO FM50 AC Drive, 2 HP, 230V 1 / 3 PH Input, 230V 3 PH Output, 7.5FLA, IP20
        167.00 Yes167.00
        FM WELCOME KIT1  FM Catalog
        Promotional Material
        0.00 Yes0.00
        Shipping Cost (UPS Ground)14.56

        On Nov 15, 2013, at 12:44 PM, "Bruce Johnson" <remoc@...> wrote:

        Hi Steve
        Can you give me the purchase information/source on the 2hp Teco FM50 for $200 ? I think this would be perfect for a project of mine with a marathon 2hp 3 ph bandsaw motor.  Thanks for your time, regards Bruce
        ----- Original Message -----
        From: Steve M
        Sent: Sunday, November 10, 2013 5:53 AM
        Subject: Re: [mill_drill] RE: Replacement motor for Enco RF-30


        Scratch that. I found a brand new US Motors hazard duty 2hp 3 phase 145T frame motor for $80. I had to bore the stock motor pulley out to fit the .875 motor shaft and make a T-shaped key. It bolted up without incident. Ordered 2hp Teco FM50 VFD with braking resistor for $200 shipped. 

        On Nov 8, 2013, at 2:50 PM, Steve M <wurker@...> wrote:

        And a TECO FM50 230v single phase input variable frequency drive.
        I also orderd 10' of link belt to replace the stock v belts.

        On Thu, Nov 7, 2013 at 3:55 PM, Guenther Paul <paulguenter@...> wrote:

        I don't have a Fu30 but motor frame sizes are easy to determine. If you goggle eclectic motor frame size i bet a site will help you.
        If you cant come 100% close, make a adapter plate. Simple Mann

        From: "woodworksfla@..." <woodworksfla@...>
        To: mill_drill@yahoogroups.com
        Sent: Thursday, November 7, 2013 6:36 PM
        Subject: [mill_drill] RE: Replacement motor for Enco RF-30
        On a Ring Fu30 what would be the frame size for a motor replacement? Couldn't find much info on it. Rick kindly sent me a pic of his motor's nameplate where it shows a F56HC.. was wondering if a F56C will work...
        ---In mill_drill@yahoogroups.com, <wgc-pe@...> wrote:
        On the TECO drives, there is a separate E-stop braking setup.  This uses the dynamic regenerative braking to slow the motor initially, then "plugs" the motor with DC.  I didn't play with the parameters extensively, but my G0602 lathe stops in less than a second when you hit the Estop.  It's a noticeably faster stop than using the "regular" stop.  (Regenerative braking can be very quick as well but the power resistor must be capable of handling a lot of heat; large drives use lots of big wirewound resistors in a resistor bank.  DC plug stopping has been around a long time, but it's hard on the motors and gearboxes since it's so abrupt.)
        That's one reason why you do not put a switch between the VFD and the motor.  The switch would eliminate the braking capabilities of the VFD and the motor would be coasting uncontrollably until it finally stopped from friction.  (Both European and American safety codes recognize using the VFD to stop the motor, the codes do NOT call for cutting power to the motor when an Estop is pushed.  The power would be cut when the motor has come to a complete stop)
        ---In mill_drill@yahoogroups.com, <rgsparber@...> wrote:
        My VFD has the braking feature but it is not a zero time stop. It takes about 2 seconds while the energy inside the motor is dumped to a power resistor. You get a lot of revolutions in 2 seconds so if you have your hand caught, it won't help much. Rick -----Original Message----- From: mill_drill@yahoogroups.com [mailto:mill_drill@yahoogroups.com] On Behalf Of lists Sent: Thursday, November 07, 2013 7:11 AM To: mill_drill@yahoogroups.com Subject: Re: [mill_drill] Replacement motor for Enco RF-30 In article <1383824266.54879.YahooMailNeo@...>, Druid Noibn <druid_noibn@...> wrote:
        > However (always one of those), in some jurisdictions a "kill switch"
        > to the motor is a requirement. Some VFD manufacturers allow this
        > BUT...require a short time, X number of milliseconds between killing
        > the power to the VFD and then isolating the motor.

        From my reading, some VFDs can do spindle braking, which could be useful in
        an emergency.

        Stuart Winsor


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