Newbie stepper outputs


Results 1 to 7 of 7

Thread: stepper outputs

  1. #1
    Registered
    Join Date
    Dec 2016
    Location
    United States
    Posts
    11
    Downloads
    0
    Uploads
    0

    Default stepper outputs

    I just got a stepcraft 2 840. I'm looking at upgrading motors. Does anyone know if you can use the 4 wire outputs to the motors to drive a new pwb with more current and voltage to the steppers? I want to use the existing controller to control everything, but thought I might boost the output for maybe nema 23s. it seems to me I could make an add on driver that uses the outputs and boosts them? Thanks, Duane

    Similar Threads:


  2. #2
    Community Moderator Jim Dawson's Avatar
    Join Date
    Dec 2013
    Posts
    5717
    Downloads
    0
    Uploads
    0

    Default Re: stepper outputs

    I don't think what you propose would work well. Stepper drives use a 2 wire input (well, three if you count the return). This gives the drive a step and direction signal from the computer, the 4 wire output to the motor is something totally different.

    In order to do what you want, you would have to access the step and direction signal input to the existing drives. The step and direction signals to most drives is 5 volts.



  3. #3
    Member ger21's Avatar
    Join Date
    Mar 2003
    Location
    Shelby Township
    Posts
    35538
    Downloads
    1
    Uploads
    0

    Default Re: stepper outputs

    If your Stepcraft is running UCCNC, then it's probably using a UC100 motion controller. You would plug a breakout board into the UC100, and connect your drives to that. Or, use a drive like a Gecko G540, which would connect directly to a UC100.

    Gerry

    UCCNC 2017 Screenset
    [URL]http://www.thecncwoodworker.com/2017.html[/URL]

    Mach3 2010 Screenset
    [URL]http://www.thecncwoodworker.com/2010.html[/URL]

    JointCAM - CNC Dovetails & Box Joints
    [URL]http://www.g-forcecnc.com/jointcam.html[/URL]

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)


  4. #4
    Registered
    Join Date
    Dec 2016
    Location
    United States
    Posts
    11
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Jim Dawson View Post
    I don't think what you propose would work well. Stepper drives use a 2 wire input (well, three if you count the return). This gives the drive a step and direction signal from the computer, the 4 wire output to the motor is something totally different.

    In order to do what you want, you would have to access the step and direction signal input to the existing drives. The step and direction signals to most drives is 5 volts.
    I was thinking the signal is correct at the stepper output, it just needs to go through another transistor that can output more current. Much like a preamp to power amp. it's already sending the correct signals to the steppers, just amplify those signals.

    Last edited by ger21; 12-21-2016 at 01:25 PM.


  5. #5
    Community Moderator Jim Dawson's Avatar
    Join Date
    Dec 2013
    Posts
    5717
    Downloads
    0
    Uploads
    0

    Default Re: stepper outputs

    Ahhh.... I misunderstood what you said. I guess that might work, but I think there is some phase to phase current limiting feedback going on in the drive. Not sure how to accommodate that. Maybe looking at some stepper drive schematics would be helpful to understand exactly what is going on there.



  6. #6
    Registered
    Join Date
    Dec 2016
    Location
    United States
    Posts
    11
    Downloads
    0
    Uploads
    0

    Default

    Quote Originally Posted by Jim Dawson View Post
    Ahhh.... I misunderstood what you said. I guess that might work, but I think there is some phase to phase current limiting feedback going on in the drive. Not sure how to accommodate that. Maybe looking at some stepper drive schematics would be helpful to understand exactly what is going on there.
    Isn't it true that a longer stepper has more torque



  7. #7
    Community Moderator Jim Dawson's Avatar
    Join Date
    Dec 2013
    Posts
    5717
    Downloads
    0
    Uploads
    0

    Default Re: stepper outputs

    Generally yes, in the same series motor, the longer the higher the torque. You have more rotor and windings.



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

stepper outputs

stepper outputs