Need Help! Chinese Spindle Stalling.. better vfd? - Page 2


Page 2 of 2 FirstFirst 12
Results 21 to 28 of 28

Thread: Chinese Spindle Stalling.. better vfd?

  1. #21
    Member
    Join Date
    Jan 2005
    Location
    USA
    Posts
    10695
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    Quote Originally Posted by Ritzy321 View Post
    I also have tried 12k and above rpm with not much difference, I have a 15A plug but didn't think running it at 8A would make a huge difference. I think I will just buy a new vfd anyway any brands you could recommend?
    Your VFD required needs to be larger than your spindle so 3Kw to 4Kw and rated for 800Hz or more

    I think you have a power supply problem to start with 15A supply is not going to run a 2.2Kw spindle

    You need a minimum 240v supply at 25A most have use 30A Circuit for the 2.2Kw spindle

    Can you post some photos of the wiring, you may not have a VFD Drive Problem

    Mactec54


  2. #22
    Member
    Join Date
    Sep 2005
    Location
    United States
    Posts
    1678
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    My Hitachi VFD calls for a 230 volt single phase 30 amp circuit, mine is #10 wire on a 30 amp breaker, for the same 2.2 kW rated spindle.

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


  3. #23
    Ritzy321's Avatar
    Join Date
    Jul 2019
    Location
    St ives
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by mactec54 View Post
    Your VFD required needs to be larger than your spindle so 3Kw to 4Kw and rated for 800Hz or more

    I think you have a power supply problem to start with 15A supply is not going to run a 2.2Kw spindle

    You need a minimum 240v supply at 25A most have use 30A Circuit for the 2.2Kw spindle

    Can you post some photos of the wiring, you may not have a VFD Drive Problem
    Ah I see, mine is only a 20A breaker. Would it not simply trip the breaker? The mains cable must only be about 10 meters from the 20A breaker and another 3m to the inverter so the voltage drop should be fairly low.

    I'm currently away, all that is wired is Active,Neutral,Earth &U,V,W, motor earth.

    Correct me if I'm wrong but if U,V,W were wired wrong would it not just spin the wrong way?

    Would something like this be better?

    https://au.rs-online.com/mobile/p/inverter-drives/1749192/

    I know it's only 650Hz but I don't need much over 16krpm..

    A friend has offered to lend me an Schnieder electric atv320 although it's only 2.2kW might be worth a try?



  4. #24
    Member
    Join Date
    Sep 2005
    Location
    United States
    Posts
    1678
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    It will only draw 8 amps or the rated amps under a heavy load or fault condition. Amp draw is an indication of load. Try running at the rated lower speed 12,000 rpm

    Last edited by wmgeorge; 09-17-2019 at 09:20 AM.
    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


  5. #25
    Member
    Join Date
    Jan 2005
    Location
    USA
    Posts
    10695
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    Quote Originally Posted by Ritzy321 View Post
    Ah I see, mine is only a 20A breaker. Would it not simply trip the breaker? The mains cable must only be about 10 meters from the 20A breaker and another 3m to the inverter so the voltage drop should be fairly low.

    I'm currently away, all that is wired is Active,Neutral,Earth &U,V,W, motor earth.

    Correct me if I'm wrong but if U,V,W were wired wrong would it not just spin the wrong way?

    Would something like this be better?

    https://au.rs-online.com/mobile/p/in...rives/1749192/

    I know it's only 650Hz but I don't need much over 16krpm..

    A friend has offered to lend me an Schnieder electric atv320 although it's only 2.2kW might be worth a try?
    Before we can answer some of your questions where do you live, what country

    The VFD Drive has to have the Hz Rating of the Spindle you can not use a lower Hz rated VFD Drive your spindle is 800Hz the VFD Drive has to be a minimum of 800Hz also

    Does U V W matter in some cases it does, most manufactures of these Spindles recommend to wire

    Pin 1=U

    Pin 2=V

    Pin 3=W

    Pin 4= Ground

    Mactec54


  6. #26
    Ritzy321's Avatar
    Join Date
    Jul 2019
    Location
    St ives
    Posts
    14
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by mactec54 View Post
    Before we can answer some of your questions where do you live, what country

    The VFD Drive has to have the Hz Rating of the Spindle you can not use a lower Hz rated VFD Drive your spindle is 800Hz the VFD Drive has to be a minimum of 800Hz also

    Does U V W matter in some cases it does, most manufactures of these Spindles recommend to wire

    Pin 1=U

    Pin 2=V

    Pin 3=W

    Pin 4= Ground
    I live in Australia, so it won't run properly or something?



  7. #27
    Member ericks's Avatar
    Join Date
    Sep 2019
    Posts
    162
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    Quote Originally Posted by Ritzy321 View Post
    I live in Australia, so it won't run properly or something?
    Where in aus?



  8. #28
    Member
    Join Date
    Jan 2005
    Location
    USA
    Posts
    10695
    Downloads
    0
    Uploads
    0

    Default Re: Chinese Spindle Stalling.. better vfd?

    Quote Originally Posted by Ritzy321 View Post
    I live in Australia, so it won't run properly or something?
    It could be a faulty Spindle from the start

    Your 20A single phase supply may be a little light, and No the VFD would only draw what it can from the supply, and will only trip the Breaker if there is a thermal overload, short circuit, or a Ground Fault, if you can measure the DC bus voltage that will tell us if the VFD Drives supply is ok, but this can be tricky to test if you don't have the right meter to do it with, I attached a web page on how to do this, it the Dc Bus voltage is low then the VFD Drive won't output enough voltage/current to drive your Spindle

    So to Know what your Dc Bus voltage should be your supply voltage say was 230v x 1.414=325.2v this is what your Dc Bus voltage and should be within +/-10v

    Troubleshooting VFD Problems – How to Measure DC Bus Voltage and DC Ripple – Voltage Disturbance

    Mactec54


Page 2 of 2 FirstFirst 12

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

Chinese Spindle Stalling.. better vfd?

Chinese Spindle Stalling.. better vfd?

Chinese Spindle Stalling.. better vfd?