10ee losing spindle speed
Close
Login to Your Account
Page 1 of 2 12 LastLast
Results 1 to 20 of 37
  1. #1
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default 10ee losing spindle speed

    Hi all,
    My 10ee stopped working a week ago. Will turn on and spindle would engage but slow down then stop.

    Checked to see if I dropped a leg of 3 phase but it did not look like it (meter crapped out of course) and the bridgeport is running off the same cord with no problem.
    While trying to diagnose spindle stopped altogether.

    Pulled the plug on the machine and that is good as well.

    I replaced the 2000 ohm capacitor today and cleaned all the rocker contacts.
    Fired it up and it sounded good.

    Made a few cuts and spindle speed began to slow after about 2 min of use.
    I turned the machine off to assess. Opened the covers and turned the machine on, powers up ok. Then engaged the spindle with the lever and nothing.

    I can hear 1 or both contacts engaging in the control panel but spindle does not spin nor do the belts.

    Checked the "open" / "back gear" lever but that is engaged.

    Any other help or tips would be appreciated. I did a search but came up with nothing but I may be using the wrong terminology in which case a nudge towards a thread would be helpful. Not sure if this is a common problem.

    Thanks in advance for any help offered.

    Jay

    Sent from my SM-G950U using Tapatalk

  2. #2
    Join Date
    Mar 2021
    Country
    UNITED STATES
    State/Province
    Texas
    Posts
    43
    Post Thanks / Like
    Likes (Given)
    79
    Likes (Received)
    16

    Default

    It would help if you posted what version of 10EE you have.

  3. #3
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Sorry,

    1946 with the square face/ dial.

    Sent from my SM-G950U using Tapatalk

  4. #4
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Little more info.
    I pulled the cover off the control box and tried again. The spindle has begun to turn again. I did notice that there is a fair amount of arcing on a couple of the contacts. Could this be causing a weak connection? Maybe I should order new or stiffer springs?

    Sent from my SM-G950U using Tapatalk

  5. #5
    Join Date
    Sep 2002
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    4,121
    Post Thanks / Like
    Likes (Given)
    1029
    Likes (Received)
    699

    Default

    Please post photos of the inside of the DC control panel (the big box full of relays, next to the spindle motor) and the tailstock-end of the motor/generator (MG), assuming that's the type of drive that you have.

    Cal

  6. #6
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Cal
    I have to rearrange a few things if you need a better or specific pic.20210915_160213.jpg

    Sent from my SM-G950U using Tapatalk

  7. #7
    Join Date
    Sep 2002
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    4,121
    Post Thanks / Like
    Likes (Given)
    1029
    Likes (Received)
    699

    Default

    The DC panel looks OK, no obvious problems in that photo. Can you post a photo of the contacts that you're concerned about? Would you be able to get to the terminals at the bottom of the DC panel to make measurements?

    I still want to see what the exciter end of the motor/generator looks like.

    Cal

  8. #8
    Join Date
    Jul 2008
    Country
    UNITED STATES
    State/Province
    South Carolina
    Posts
    1,049
    Post Thanks / Like
    Likes (Given)
    623
    Likes (Received)
    710

    Default

    I will be watching this thread with interest. I have a 1950 with similar issues. It had had been left outside for several years and when I finally got it somewhat cleaned up and running it seemed to have the same problem as what Jay has described. I assumed my headstock bearings were going south and I dropped the ball and it's been mothballed since. It sure would be nice if an easier fix them the pricey bearings.

    For what is worth the spindle never felt bad just seen to tighten up a bit. And over time I could start it up but same issue.

    Hodge
    Last edited by Hodge; 09-15-2021 at 07:43 PM.

  9. #9
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Quote Originally Posted by Cal Haines View Post
    The DC panel looks OK, no obvious problems in that photo. Can you post a photo of the contacts that you're concerned about? Would you be able to get to the terminals at the bottom of the DC panel to make measurements?

    I still want to see what the exciter end of the motor/generator looks like.

    Cal
    The contacts I was concerned about were the ones that make contact when the forward/ reverse lever is engaged. They are the ones with the silver springs and cotter pins.

    Cal in the box I pictured? Or elsewhere?


    Sent from my SM-G950U using Tapatalk

  10. #10
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    One of these?20210915_172101.jpg20210915_172108.jpg

    Sent from my SM-G950U using Tapatalk

  11. #11
    Join Date
    Sep 2002
    Country
    UNITED STATES
    State/Province
    Arizona
    Posts
    4,121
    Post Thanks / Like
    Likes (Given)
    1029
    Likes (Received)
    699

    Default

    The two big relays/contactors that are sitting side-by-side are the forward (F) and reverse (R) contactors. The relays at the top won't cause the symptom that your describing. Post a photo or two that show the contact surfaces of the F and R contactors.

    The original motor/generator (MG) was located in the base, under the chip pan. I want to see what drive you have and if it's original. Take off the big cover on the tailstock end and shoot a picture of what's behind it.

    Cal

  12. #12
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Quote Originally Posted by Cal Haines View Post
    The two big relays/contactors that are sitting side-by-side are the forward (F) and reverse (R) contactors. The relays at the top won't cause the symptom that your describing. Post a photo or two that show the contact surfaces of the F and R contactors.

    The original motor/generator (MG) was located in the base, under the chip pan. I want to see what drive you have and if it's original. Take off the big cover on the tailstock end and shoot a picture of what's behind it.

    Cal
    I will do that.
    I believe every thing is original. I will try and get pics in the AM but I usually do billing in the AM then head to a different shop for the day. Realistically it will be tomorrow PM or Friday before I can get those pics.
    Thanks for all your help thus far.

    Sent from my SM-G950U using Tapatalk

  13. #13
    Join Date
    Sep 2011
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    21,014
    Post Thanks / Like
    Likes (Given)
    7561
    Likes (Received)
    12292

    Default

    Quote Originally Posted by Jaymce View Post
    I will do that.
    I believe every thing is original. I will try and get pics in the AM but I usually do billing in the AM then head to a different shop for the day. Realistically it will be tomorrow PM or Friday before I can get those pics.
    Thanks for all your help thus far.

    Sent from my SM-G950U using Tapatalk
    MG units CAN run for ages with very little maintenance. That is not the same as "zero".

    The final-drive motor has four brushes, large ones, and a LOT of commutator area.

    The Exciter (for Field) and primary DC generator (for Armature) deliver ALL of the power to it, but both have smaller commutator swept area and smaller brushes.

    Brush life common expectation runs from around 2,000 "Power ON hours" to 6,000. The Generator & exciter are always ON when the machine is in use. The motor not always. Their life expectancy is less than motor brush life.

    The relay may be your proximal cause of truancy, but it could be a good time to have a close look at all three sets of brushes, their guides and "tamper" springs, and their commutators as well.

  14. #14
    Join Date
    Jun 2008
    Location
    Dassel,MN,USA
    Posts
    231
    Post Thanks / Like
    Likes (Given)
    41
    Likes (Received)
    91

    Default

    I have an early 50s square dial that came with MG set and DC drive.

    Scrapped the whole electrical out and replaced it with 3 phase/VFD. So, I got parts for sale - cheap.

  15. #15
    Join Date
    Sep 2011
    Country
    UNITED STATES
    State/Province
    Virginia
    Posts
    21,014
    Post Thanks / Like
    Likes (Given)
    7561
    Likes (Received)
    12292

    Default

    Quote Originally Posted by Karl_T View Post
    I have an early 50s square dial that came with MG set and DC drive.

    Scrapped the whole electrical out and replaced it with 3 phase/VFD. So, I got parts for sale - cheap.
    Well ... good news.

    Post up whatcha have and what you want for it.

    Somebody will probably want it to undo a VFD kludge and put a 10EE back to rights in future.

    I've already got spares to make certain I never have to do the downgrade to begin with.

  16. #16
    Join Date
    Mar 2012
    Location
    Las Vegas
    Posts
    842
    Post Thanks / Like
    Likes (Given)
    15
    Likes (Received)
    107

    Default

    PM sent on the MG parts

  17. #17
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Hope these pics help. If not I can take more.20210917_082108.jpg20210917_082220.jpg20210917_082235.jpg20210917_082230.jpg

    Sent from my SM-G950U using Tapatalk

  18. #18
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    I may have multiple issues going on.

    Machine started today
    Made a few cuts with the rear cover off.
    Machine was making an arcing sound.
    Snapped a quick vid to upload but it was too big. Went to take a short vid and machine will not engage spindle.

    Link to Facebook and you can see the arcing from the lower unit on the MG .

    https://youtu.be/bNR_ttih-M4


    Sent from my SM-G950U using Tapatalk

  19. #19
    Join Date
    Sep 2016
    Country
    UNITED STATES
    State/Province
    Missouri
    Posts
    1,197
    Post Thanks / Like
    Likes (Given)
    992
    Likes (Received)
    399

    Default

    That appears to be motor brushes arcing.

    10EE smoking and arcing (practicalmachinist.com)

  20. Likes Jaymce liked this post
  21. #20
    Join Date
    Jan 2013
    Location
    New England
    Posts
    112
    Post Thanks / Like
    Likes (Given)
    23
    Likes (Received)
    15

    Default

    Will motor brushes also cause no spindle engagement?

    Also is the lower the motor and upper the generator?

    Sorry for what is probably simple questions. The manual I have does not show that end of the machine and is one I downloaded from online.



    Sent from my SM-G950U using Tapatalk


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
  •