Vfd on a Variable speed mill
Close
Login to Your Account
Results 1 to 9 of 9
  1. #1
    Join Date
    Feb 2018
    Country
    UNITED STATES
    State/Province
    Kansas
    Posts
    2
    Post Thanks / Like
    Likes (Given)
    0
    Likes (Received)
    1

    Default Vfd on a Variable speed mill

    Can I run a VFD with a 3 phase Alliant knee mill that has a variable speed motor ? Any pros or cons ? Any recommendations on one of I can ? Thanks. This is my first mill so I’m a newwby

  2. #2
    Join Date
    May 2003
    Country
    UNITED STATES
    State/Province
    Iowa
    Posts
    9,838
    Post Thanks / Like
    Likes (Given)
    3025
    Likes (Received)
    3682

    Default

    I do
    Have for years. Actually my second.
    JR

  3. Likes Monarchist liked this post
  4. #3
    Join Date
    Feb 2014
    Location
    New Hampshire
    Posts
    178
    Post Thanks / Like
    Likes (Given)
    14
    Likes (Received)
    38

    Default

    There is nothing that can convince me to not run a VFD on any machine , I use them on everything, total control and phase conversion ... Do it


    Sent from my iPad using Tapatalk

  5. Likes Pathogen liked this post
  6. #4
    Join Date
    Dec 2013
    Location
    Fort Wayne, IN
    Posts
    275
    Post Thanks / Like
    Likes (Given)
    320
    Likes (Received)
    97

    Default

    When you run your VFD on a varispeed head, do you guys control speed via the VFD or the head? Do you guys change out the variable pulley for a stationary one?

    When we fix 2J heads that are run on a VFD, we see that the motor shafts get tore up from being run in the same spot...

    Just a thought.

    Jon
    H&W Machine Repair

  7. Likes JRIowa liked this post
  8. #5
    Join Date
    Nov 2008
    Location
    Madera county california usa
    Posts
    1,992
    Post Thanks / Like
    Likes (Given)
    16
    Likes (Received)
    454

    Default

    We wish we still had the "vari" in ours.

    The previous owner was a small machine shop that stripped out the variable speed parts as they were worn out and replaced with single speed pulley and added vfd, he had 3 phase so matching size.

    We are single phase so it has issues with heavy cuts and back gear is needed.

    The variable speed allows torque to be there if needed.

    Sent from my SAMSUNG-SGH-I337Z using Tapatalk

  9. Likes HWElecRepair liked this post
  10. #6
    Join Date
    Dec 2011
    Location
    Maryland
    Posts
    74
    Post Thanks / Like
    Likes (Given)
    4
    Likes (Received)
    41

    Default

    Quote Originally Posted by HWElecRepair View Post
    When you run your VFD on a varispeed head, do you guys control speed via the VFD or the head? Do you guys change out the variable pulley for a stationary one?

    When we fix 2J heads that are run on a VFD, we see that the motor shafts get tore up from being run in the same spot...Just a thought. Jon H&W Machine Repair
    When I run my 2J head VFD powered machine, I vary the speed using the mechanical split pulley system. Never have a need to further vary speed with the VFD.

  11. Likes HWElecRepair liked this post
  12. #7
    Join Date
    Nov 2005
    Country
    UNITED STATES
    State/Province
    New Hampshire
    Posts
    367
    Post Thanks / Like
    Likes (Given)
    365
    Likes (Received)
    217

    Default

    Quote Originally Posted by HWElecRepair View Post
    When you run your VFD on a varispeed head, do you guys control speed via the VFD or the head? Do you guys change out the variable pulley for a stationary one?
    I use the VFD primarily for phase conversion, once I used the VFD to slow down the spindle when low is not low enough for some oddball boring job I was doing. Usually the VFD is set at 60HZ and I use the vary speed head. It is quick, easy and works.

  13. Likes HWElecRepair liked this post
  14. #8
    Join Date
    Jul 2009
    Location
    Southampton UK
    Posts
    49
    Post Thanks / Like
    Likes (Given)
    1
    Likes (Received)
    3

    Default Ditto

    Quote Originally Posted by Warren View Post
    I use the VFD primarily for phase conversion, once I used the VFD to slow down the spindle when low is not low enough for some oddball boring job I was doing. Usually the VFD is set at 60HZ and I use the vary speed head. It is quick, easy and works.
    And it means you use still use the varispeed which is meant to be wound up & down thru the range periodically
    Last edited by Tray; 02-13-2018 at 06:07 AM. Reason: typos

  15. Likes HWElecRepair liked this post
  16. #9
    Join Date
    May 2003
    Country
    UNITED STATES
    State/Province
    Iowa
    Posts
    9,838
    Post Thanks / Like
    Likes (Given)
    3025
    Likes (Received)
    3682

    Default

    Bill, nothing to add, why?


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •