Sharnoa 4 axis retrofit - Page 5

Page 5 of 13 FirstFirst ... 2345678 ... LastLast
Results 49 to 60 of 150

Thread: Sharnoa 4 axis retrofit

  1. #49
    Registered
    Join Date
    Jul 2006
    Location
    USA
    Posts
    139
    Downloads
    0
    Uploads
    0

    Default

    I've backed up to the point of doing the initial power up of the boards. No bob or Mach connected.

    What I did when I smoked the one board:
    This was after the problems started. I had found a loose wire, so I started checking the other wires. I wiggled the 120v power in on one drive and the ground wire came out, leaving the positive wire in the connection. It melted the fuse holder next to the plug.
    Here is a picture of my boards.
    have fun
    i_r_

    Attached Thumbnails Attached Thumbnails Sharnoa 4 axis retrofit-100_4945-jpg  


  2. #50
    Registered keithmech's Avatar
    Join Date
    Nov 2006
    Location
    canada
    Posts
    69
    Downloads
    0
    Uploads
    0

    Default

    If you have the campbell bob, and you have the little axis indicator
    board you can see it all working without connecting the motors or
    even the drives.With amch loaded and the campbell xml file,using the arrow keys will tell if steps are working.



  3. #51
    Registered
    Join Date
    Jul 2006
    Location
    USA
    Posts
    139
    Downloads
    0
    Uploads
    0

    Default

    I dumped mach and re-installed. When I hit the button to move an axis, the indicators on the bob light up, so at least I know its communicating. I'm trying to tune the other two axis', but the boards still fault out as soon as I turn on the dc drive power.
    i_r_



  4. #52
    Company Representative
    Join Date
    Feb 2007
    Location
    canada
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    A loose power wire at 120 volts on power side or motor side, can definitely damage a board. The inrush current from the powersupply is deadly.
    Send it back and i can fix it.

    Does your estop circuit turn off the 12 volt side ? If this power has a bounce in it (from a relay or contactor) it can cause the drive to blow because the cpu doesn't initialize properly. I've recently changed the code for a better delay and soft startup.

    Larry

    Last edited by Larken; 06-06-2010 at 01:15 PM.
    Manufacturer of CNC routers and Viper Servo Drives
    www.LarkenCNC.com and www.Viperservo.com


  5. #53
    Registered
    Join Date
    Jul 2006
    Location
    USA
    Posts
    139
    Downloads
    0
    Uploads
    0

    Default

    The 12 power supply to the boards doesn't run through my estop at this time.I have it connected to a power strip with a diferent ground source. It is on the same power strip as the pc. The x board comes up everytime. I've gone through the initial tuning, but the two boards still fault. The green and red light will come on, the red light will go out, the red light by the pot will come on, go out, then the red light will start flashing. Do I need to send the other boards back for the softstart code?

    i_r_

    ps. I'll get the burnt board in the mail next week.



  6. #54
    Company Representative
    Join Date
    Feb 2007
    Location
    canada
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    Kerry, In a previous post you said you applied power to the drives by releasing the Estop. Is this turning on the main power ?

    Turning on the main power after the control power (12V) is on can cause the drives to jump and possible have a current surge if the motor has moved or the drive has recieved step pulses .

    Its best to do it the otherway. Turn on the main power first then the 12volts or Turn on the 2 powers at the same time .

    note; If the drives lights the red and yellow leds (when you first power it) and then goes off, you may have burnt one of the upper mosfets .

    Manufacturer of CNC routers and Viper Servo Drives
    www.LarkenCNC.com and www.Viperservo.com


  7. #55
    Registered keithmech's Avatar
    Join Date
    Nov 2006
    Location
    canada
    Posts
    69
    Downloads
    0
    Uploads
    0

    Default

    might be an idea to also put varistors across the servo
    transformer output.If you used the original transformer
    1 on each phase.

    Attached Thumbnails Attached Thumbnails Sharnoa 4 axis retrofit-varistor-jpg  


  8. #56
    Company Representative
    Join Date
    Feb 2007
    Location
    canada
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    I added a mod to the Viper 200 today that will fix your problem.

    Up to now, the drive didn't have low voltage detection on the power side. Since the drive is opto-isolated the control side didn't know if there was voltage on the power side. I've made a mod that uses the current warning optocoupler as a low voltage monitor (or no voltage on power side). This takes away the current warning adjustment, but adds a needed feature.
    I've also added soft start on reset and the choice to have the drive reset when main power is reapplied or to wait and soft start on repower.

    Of the repairs of Viper 200's i've had, most people have said it happened after a reset. So this will make the drive more flexable on how the user has connected his Estop circuit.

    So if you send back your drives I can add this feature.

    Larry

    Manufacturer of CNC routers and Viper Servo Drives
    www.LarkenCNC.com and www.Viperservo.com


  9. #57
    Registered
    Join Date
    Jul 2006
    Location
    USA
    Posts
    139
    Downloads
    0
    Uploads
    0

    Default

    I'll pack them up this evening and get them in the mail tomorrow. Can you post the adress so I don't have to look it up?
    Thanks
    i_r_



  10. #58
    Company Representative
    Join Date
    Feb 2007
    Location
    canada
    Posts
    927
    Downloads
    0
    Uploads
    0

    Default

    Larken Automation,
    5350 Canotek Rd Unit 13,
    Ottawa Ontario,
    Canada, K1J-9E1

    (613) 746 5685

    Send them by mail if you can since couriers will charge a brokerage fee

    Larry

    Manufacturer of CNC routers and Viper Servo Drives
    www.LarkenCNC.com and www.Viperservo.com


  11. #59
    Registered
    Join Date
    Sep 2006
    Location
    US
    Posts
    291
    Downloads
    0
    Uploads
    0

    Default

    Guys,
    Keep posting on this project. I'm following it all, in case I have to do one to mine.

    Thanks,
    JAckal



  12. #60
    Registered
    Join Date
    Jul 2006
    Location
    USA
    Posts
    139
    Downloads
    0
    Uploads
    0

    Default

    Boxed up the boards last night. Will mail them at noon today.I'm going to work on wiring my VFD while waiting on the vipers. I also have to find out what a varistor is.
    Don't worry Jackal, I'm even documenting my mistakes. Are you the Jackal from PM? Man, those guys get rabid when anyone mentions retrofit.
    onward thru the fog
    i_r_



Page 5 of 13 FirstFirst ... 2345678 ... LastLast

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

Sharnoa 4 axis retrofit

Sharnoa 4 axis retrofit