1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. PLEASE: Read the FORUM RULES BEFORE registering!

    Dismiss Notice

Old Westinghouse Motor Turns The Wrong Way!

Discussion in 'ELECTRICAL ISSUES - POWER YOUR MACHINES & SHOP' started by Glenn Brooks, Dec 15, 2016.

  1. Glenn Brooks

    Glenn Brooks H-M Supporter - Premium Content H-M Supporter-Premium

    Likes Received:
    141
    Trophy Points:
    43
    City:
    Woodinville
    State:
    Washington

    -Return to Top-

    IMG_1206.JPG IMG_1205.JPG IMG_1204.JPG hello all,

    Well, finally got finished restoring my old 1919 Dalton 7 x36 lathe tonight. Threw the switch to take a test cut and low and behold noticed the chuck was turning the wrong way! The antique Westinghouse 1/4 hp motor I sourced some time ago, and recently installed, apparently is wired to turn CLOCKWISE -which spins the lathe in reverse!

    Anyway to rewire this thing to turn counterclockwise. I only see two terminals for the (110v) load. Here are some pics of the business end of the motor.

    Thanks much,
    Glenn
     
  2. Heckle and Jeckle

    Heckle and Jeckle United States Active Member Active Member

    Likes Received:
    40
    Trophy Points:
    18
    City:
    Earth
    State:
    Georgia

    -Return to Top-

    Two choices, run the belt with a figrue 8 in it or physically 180 the motor and remount in the housing if there is room ... Not changing the direction moving the wiring..
     
  3. tq60

    tq60 United States Active Member Active Member

    Likes Received:
    94
    Trophy Points:
    28
    City:
    madera
    State:
    California

    -Return to Top-

    Label does not state rotation and second photo looks like starter.

    Look close for a third wire that is connected to one of the line wires.

    You also can try contacting manufacturer or visit an old school motor shop and ask.

    It is likely a 5 minute task.

    Sent from my SAMSUNG-SGH-I337Z using Tapatalk
     
  4. CluelessNewB

    CluelessNewB Active Resistor H-M Supporter-Premium

    Likes Received:
    289
    Trophy Points:
    83
    Location:
    United States Southern Maine
    City:
    Gorham
    State:
    Maine

    -Return to Top-

    It's hard to tell from the pictures but I suspect you can change the direction. I don't see any capacitor but I do see a starting switch so I believe it is a split phase motor. You may need to un-solder and re-solder some wires. (Edit: no it looks like just some screws!) You need to swap the electrical relationship between the run and start windings. Attached is a diagram. The start winding is the one that has the starting switch attached.

    split_phase.png
     
    RJSakowski likes this.
  5. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

    Likes Received:
    92
    Trophy Points:
    28
    City:
    Red Wing
    State:
    Minnesota

    -Return to Top-

    If you can get to the starter winding you can reverse it. How many leads coming out of the motor?
     
  6. Uglydog

    Uglydog United States Active User H-M Supporter-Premium

    Likes Received:
    812
    Trophy Points:
    113
    City:
    Dayton
    State:
    Minnesota

    -Return to Top-

    Last edited: Dec 15, 2016
  7. markba633csi

    markba633csi United States Active Member Active Member

    Likes Received:
    119
    Trophy Points:
    43
    City:
    Mountain View
    State:
    California

    -Return to Top-

    Glenn I marked up one of your pix- the red arrow is one end of the start winding, the other end is among the ones above (yellow arrow).
    Isolate the start winding and swap the ends, should reverse it.
    PS you know it's an old motor when it says 110 rather than 115 or 120!
    Mark S. glennmot2.JPG
     
    Ulma Doctor likes this.
  8. Glenn Brooks

    Glenn Brooks H-M Supporter - Premium Content H-M Supporter-Premium

    Likes Received:
    141
    Trophy Points:
    43
    City:
    Woodinville
    State:
    Washington

    -Return to Top-

    Thanks, Mark. The arrows in the photo are very, very helpful. The top three wires, one of which is adjacent to your yellow tick mark are buried inside the motor. I'll try to open it up a bit more tomorrow. I reckon the motor might be an early 1920's model, judging from the wiring harness and architecture of the case.

    Glenn
     
  9. markba633csi

    markba633csi United States Active Member Active Member

    Likes Received:
    119
    Trophy Points:
    43
    City:
    Mountain View
    State:
    California

    -Return to Top-

    Put some little masking tape labels on the wires when you start undoing them Glenn, it really helps I've found.
    Mark S.
    Oh BTW I don't think you need to go deeper into the winding side of the motor; the wires you need are right there in the photo of the end-bell wiring. A closer-up view of how those three upper (yellow arrow) wires connect to the outside world would be helpful. The other end of the start winding is one of those 3, I'm pretty sure.
     
    Last edited: Dec 15, 2016

Share This Page