540,760 active members*
3,153 visitors online*
Register for free
Login
IndustryArena Forum > CNC Electronics > Stepper Motors / Drives > Two stepper motor on one Drive
Results 1 to 7 of 7
  1. #1
    Registered
    Join Date
    Nov 2017
    Posts
    1

    Two stepper motor on one Drive

    Hi, was wondering if helps with synchronization to have identical length wires to each motor, if wiring two motors from a single driver? How does the length effect the stepper motors ? My farthest motor is 15' and the other one is 12' away from the drive.

    Thanks

  2. #2
    Community Moderator ger21's Avatar
    Join Date
    Mar 2003
    Posts
    35454

    Re: Two stepper motor on one Drive

    Two motors with one drive is not recommended. Separate drives for each motor is a better option.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

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

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

  3. #3
    Registered
    Join Date
    May 2015
    Posts
    1422

    Re: Two stepper motor on one Drive

    Wire length won't make much difference until your clock rates get up to the gigahertz speeds - about a million times faster than you'll find on any CNC machine.

    So don't worry about that.

    Worry instead that any driver worth two pinches of goat sh1t will attempt to manage current to the motor and that, unless the steppers are IDENTICAL (ie never gonna happen) then one stepper will always be shunting more of the oomph and fighting the other. At best your torque out, already limited by using steppers, is going to be even further limited. At worst, overloading the drivers or one of the steppers and you'll have smoke and sadness and regret.

    Best approach is one stepper per driver, pair up the inputs to the drivers instead (if you can't run them independently from your controller and have the software slave them out).

  4. #4
    Registered
    Join Date
    Jan 2018
    Posts
    4

    Re: Two stepper motor on one Drive

    Wire length doesn't matter much, single stepper motor driver doesn't work well for running 2 motors because of different winding resistance, inductance and bigger back EMF with two motors.

  5. #5
    Registered
    Join Date
    Jan 2011
    Posts
    30

    Re: Two stepper motor on one Drive

    Hi
    I post moslty same question last week.. So on the controller output pin, it will be ok to feed 2 driver at same time without any hickup ?
    So we will be able to got 2 smaller motor to drive out the whole system, instead of 1 big stepper.

  6. #6
    Registered
    Join Date
    Jun 2012
    Posts
    128

    Re: Two stepper motor on one Drive

    Check the datasheet of the driver input needs and the controller output capabilities. In general a GPIO pin will have a 'fan out' able to drive several similar inputs. You really need to read the doc instead of asking questions to get a proper answer.

  7. #7
    Member
    Join Date
    Dec 2020
    Posts
    2

    Re: Two stepper motor on one Drive

    If you're an active OneDrive user, then knowing how to backup files to onedrive is crucial for you. Cybersecurity has become an afterthought in the business world and that's really dissapointing.

Similar Threads

  1. Can DRV8825 Stepper motor drive power a 425ozInch/3Nm stepper?
    By DHamilton in forum Vertical Mill, Lathe Project Log
    Replies: 1
    Last Post: 11-26-2015, 05:17 AM
  2. how to drive THIS stepper motor.....
    By billcat in forum Stepper Motors / Drives
    Replies: 7
    Last Post: 11-22-2014, 08:45 PM
  3. What do you want from a CNC stepper motor drive?
    By ldoiron17 in forum Stepper Motors / Drives
    Replies: 2
    Last Post: 05-21-2014, 12:32 AM
  4. 4A stepper motor drive
    By mithunraj in forum Stepper Motors / Drives
    Replies: 0
    Last Post: 04-17-2008, 08:15 AM
  5. ?? How to drive the Stepper Motor
    By eein in forum General CNC Machine Related Electronics
    Replies: 3
    Last Post: 08-30-2007, 02:40 AM

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
  •