Need Help! Electrocraft E726 with brake locked.


Results 1 to 4 of 4

Thread: Electrocraft E726 with brake locked.

  1. #1
    Registered
    Join Date
    Sep 2011
    Location
    United States
    Posts
    474
    Downloads
    0
    Uploads
    0

    Default Electrocraft E726 with brake locked.

    Ie had these for a while. I cannot seem to get the brake to disengage. Ive tried 12 to 24V at varying amperage to the white wires and it remains locked. Heres some pics. The yellow and green ground goes to a plug with the brake wires, though it doesnt seem like it would effect an electromagnetic brake. PLEASE help!

    Electrocraft E726 with brake locked.-e726-jpg


    Electrocraft E726 with brake locked.-e726back-jpg

    Thanks in advance.

    Similar Threads:


  2. #2
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
    Location
    Canada
    Posts
    24216
    Downloads
    0
    Uploads
    0

    Default Re: Electrocraft E726 with brake locked.

    What is the resistance across the brake?
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


  3. #3
    Registered
    Join Date
    Sep 2011
    Location
    United States
    Posts
    474
    Downloads
    0
    Uploads
    0

    Default Re: Electrocraft E726 with brake locked.

    Quote Originally Posted by Al_The_Man View Post
    What is the resistance across the brake?
    Al.
    I think my multimeter is faulty. It reads as 1 when set to a sensitivity of 200 ohms max. I spoke with electrocraft and they think its probabably a 90V brake and should read .42ohms across the leads. I have no way to test this other than running 120V AC through a bridge rectifier to get a jittery 90VDC.



  4. #4
    Community Moderator Al_The_Man's Avatar
    Join Date
    Dec 2003
    Location
    Canada
    Posts
    24216
    Downloads
    0
    Uploads
    0

    Default Re: Electrocraft E726 with brake locked.

    There is no problem with using unfiltered DC for large components such as brakes or clutches, it is done all the time.
    But .42 ohms is Way too low for a DC brake, especially a 120v one, 90/.42 = 214AMPS!!!.
    That would be more in line with an AC version, as the inductive reactance comes in to play, effectively in series with the resistance.
    Are you sure it is actually a brake??
    Al.

    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.


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

Electrocraft E726 with brake locked.

Electrocraft E726 with brake locked.