DM4400-what size 3 phase motor for rotary converter - Page 8

Page 8 of 8 FirstFirst ... 5678
Results 85 to 95 of 95

Thread: DM4400-what size 3 phase motor for rotary converter

  1. #85
    Registered
    Join Date
    Dec 2009
    Location
    USA
    Posts
    319
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by drhanger View Post
    Problem solved (with fingers crossed); turned out to be pretty easy, even for a novice like me. After studying the schematics some more, I realized that the same 115V connection to the thermal switch also connected with the ATC relay board (pdf page 104, schematic page 11, CN2 on lower right of board). Not coincidentally this board controlled the two motors for the ATC that had been disabled. I traced the cable from CN2 to the terminal block that tied it with the thermal switch and removed it, then threaded it directly to the transformer secondary connection that I had removed. This bypassed the thermal switch (for the time being) and brought it back to being isolated from the machine ground. Once I completed that, everything initialized finally.

    Case closed on this issue. Time to move on to the next part of the project.

    Dan
    Great detective work Dan!
    So, what is your next move?



  2. #86
    Registered
    Join Date
    Apr 2010
    Location
    United States
    Posts
    52
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Hey Marty-

    It's looking more and more like I'll be 'Frankensteining' the two machines into one good one. There's no question about the bearings, spindle makes a lot of noise! I removed and replaced the spindle cartridge just as a 'dress rehearsal' for when I have the riggers once again provide power for the stored machine and remove the spindle from it and put it in the home machine. I know that spindle is good because I've heard it run several times and never noticed anything. So at this point I'm kinda resigned to having one good machine, and one to provide spare parts and eventually discard as scrap iron I suppose.



  3. #87
    Registered
    Join Date
    Dec 2009
    Location
    USA
    Posts
    319
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Did you take the belt off the spindle to see if it wasn't the spindle motor?
    Replacing the spindle bearings is likely doable....

    Marty



  4. #88
    Registered
    Join Date
    Apr 2010
    Location
    United States
    Posts
    52
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by Marty_Escarcega View Post
    Did you take the belt off the spindle to see if it wasn't the spindle motor?
    Replacing the spindle bearings is likely doable....

    Marty
    Yeah, that was the first thing I checked was the motor or the spindle. It's definitely the spindle--when I had it on the bench just turning it by hand I could hear and feel it. I did contact DM and talked to Roberto--he gave me some procedural instructions which involves an oil pressure injection to pop the top off to get to the rest of it. There are three at the spindle nose and one at the top. He had the 3 lower bearings in stock for $150/each, but not the top one. I think it's only one or more of the lower ones, but won't really know until I actually attempt it. I'll set it aside for now and if the time comes when I really need it I'll do something about it then. Right now I just don't want to spend any more than is necessary to get it going.

    If I don't have to cannibalize the other machine too much I could eventually work on getting it back into operation as well. Right now I've got the servo amp out--during my adventures with that I fried a circuit board component--doesn't look bad at all and I'm sure that can be repaired. With that and the spindle I (will) have two items from the other one, and at the moment I'm not seeing anything else I need out of it, so maybe in the future I won't need to do that much to get it going again.



  5. #89
    Registered
    Join Date
    Dec 2013
    Posts
    294
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    If you're interested in sending the spindle out for rebuild, I used these guys to do mine. Home Their website is a bit lacking, but they do good spindle work.

    I had them do the 5 bearing upgrade to my BP clone spindle, very satisfied with the job. The total was about $900, including a #30 taper regrind. I think the standard rebuild is about $600.



  6. #90
    Registered
    Join Date
    Apr 2010
    Location
    United States
    Posts
    52
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by Jim Dawson View Post
    If you're interested in sending the spindle out for rebuild, I used these guys to do mine. Home Their website is a bit lacking, but they do good spindle work.

    I had them do the 5 bearing upgrade to my BP clone spindle, very satisfied with the job. The total was about $900, including a #30 taper regrind. I think the standard rebuild is about $600.
    Holy smokes, that sounds cheap. Just buying the bearings alone (including the top one) is likely to cost me more than 600, not to mention the labor. Thanks for the lead.



  7. #91
    Registered
    Join Date
    Apr 2007
    Location
    United States
    Posts
    37
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Drhanger,

    I've been reading over you post. You are in the Phoenix area? You should be talking to this guy: mc-machine.com - Home His user name on this forum is "Capri". He has a few of these DM440M machines. Plus he used to work for DynaMechtronics as a repair tech. He has helped me many times on this forum.

    Oh, and back to your original question on Phase converters..... I use a 5hp to run mine. works fine, except that I can't turn on any other equipment in the shop. too much voltage drop.

    Good Luck with you machine. I have a DM440M, and for the past two years it's been a dead horse, collecting dust.

    Bill K



  8. #92
    Registered
    Join Date
    Dec 2009
    Location
    USA
    Posts
    319
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by bkobernus View Post
    Drhanger,

    I've been reading over you post. You are in the Phoenix area? You should be talking to this guy: mc-machine.com - Home His user name on this forum is "Capri". He has a few of these DM440M machines. Plus he used to work for DynaMechtronics as a repair tech. He has helped me many times on this forum.

    Oh, and back to your original question on Phase converters..... I use a 5hp to run mine. works fine, except that I can't turn on any other equipment in the shop. too much voltage drop.

    Good Luck with you machine. I have a DM440M, and for the past two years it's been a dead horse, collecting dust.

    Bill K
    Used to....Mike has been pretty busy and all but fallen off the face of the earth....I tried to contact him several times with no response. Not going anywhere with that I don't think.



  9. #93
    Registered 2ferrous's Avatar
    Join Date
    Jul 2010
    Location
    Canada
    Posts
    123
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Just as a note of caution, when you're swapping parts to make one good machine out of two, the three ball screws are fitted to each machine uniquely.
    If you take the Y ball screw out of one machine and tried to fit into the other, the bolt holes will sort of line up but not 100%
    And when you start the machine back up, it makes horrible noises.
    Trust me on that one.

    However the balls screw assemblies are pretty easy to service.
    So is the spindle motor. I've rebuilt two of mine already.
    Super smooth and quiet with new bearings.


    Timothy

    Dyna Mechtronics DM4400, Bridgeport Discovery 300, HAAS VF-0E
    BobCad 16, 20, 24 and V25


  10. #94
    Registered
    Join Date
    Apr 2010
    Location
    United States
    Posts
    52
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by 2ferrous View Post
    Just as a note of caution, when you're swapping parts to make one good machine out of two, the three ball screws are fitted to each machine uniquely.
    If you take the Y ball screw out of one machine and tried to fit into the other, the bolt holes will sort of line up but not 100%
    And when you start the machine back up, it makes horrible noises.
    Trust me on that one.

    However the balls screw assemblies are pretty easy to service.
    So is the spindle motor. I've rebuilt two of mine already.
    Super smooth and quiet with new bearings.


    Timothy
    Yeah I knew the ball screws would not be something I would wanna exchange between the two. So far I haven't had any noticeable issue with the screws, but then I haven't done any cutting yet so no way to know about the accuracy yet.



  11. #95
    Registered
    Join Date
    Dec 2009
    Location
    USA
    Posts
    319
    Downloads
    0
    Uploads
    0

    Default Re: DM4400-what size 3 phase motor for rotary converter

    Quote Originally Posted by 2ferrous View Post
    Just as a note of caution, when you're swapping parts to make one good machine out of two, the three ball screws are fitted to each machine uniquely.
    If you take the Y ball screw out of one machine and tried to fit into the other, the bolt holes will sort of line up but not 100%
    And when you start the machine back up, it makes horrible noises.
    Trust me on that one.

    However the balls screw assemblies are pretty easy to service.
    So is the spindle motor. I've rebuilt two of mine already.
    Super smooth and quiet with new bearings.


    Timothy
    Hi Tim,
    Were you able to pull the armature out of the housing to service the bearings?
    I'm having some surges and can actually see spikes on the load meter.(with no real load on the spindle) I'm trying to figure out where to start looking. Arcing on the commutator or perhaps an issue with the Tach?



Page 8 of 8 FirstFirst ... 5678

Tags for this Thread

Posting Permissions

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


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

DM4400-what size 3 phase motor for rotary converter
DM4400-what size 3 phase motor for rotary converter