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Solved New Generic Ramps 1.4 Board Z axis voltage setting

Discussion in 'Troubleshooting' started by Lee, Oct 28, 2019.

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  1. Lee

    Lee Member

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    I recently installed a new generic Ramps 1.4 board on my Robo 3d R1+ following the excellent instruction provided in:

    http://community.robo3d.com/index.p...and-rewiring-to-make-generic-ramps-work.8356/

    In another listing I saw voltages the of the original Robo of:
    X: .598
    Y: .379
    Z: .472
    E: .339


    I set the voltages to .48 on all of them. The problem is the Z Axis. Since the driver now has 2 steppers running off one driver, what should the voltage be set at? Since the current is dividing, should I set it at about .9? My concern is that the driver is rated at 2 amps (with cooling and heat sink) and running the voltage at .9 would put it pretty close to the 2 amp max. Am I missing something?
     
  2. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    No, leave it around .5, only change the potentiometer if you are experiencing missed steps or chattering when moving the Z axis.
     
  3. Lee

    Lee Member

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    I should have mentioned that the Z steppers are just barely working. The extruder assembly goes up a couple of inches and then hangs unless I push up gently with my finger. How about if I just increase the voltage to about .6 or .7. I wanted to find out what any of you have set your voltage to before I just start cranking up until it works. I think everyone would benefit from having a recommended voltage point. I am guessing we all going to be using generic ramps boards at some point since the original ramps boards are no longer available.
     
  4. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    Make small adjustments, you need it to be barely in the correct range to keep the stepper driver cool
     
    Geof likes this.
  5. Lee

    Lee Member

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    Thank you for your suggestions. I have set it .6V and it is working fine. On a short print Z stepper driver ran cool. I'll try a long print and and post the results. But it will be a few days before I can do that. Thanks again
     
    Geof likes this.
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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  7. Lee

    Lee Member

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    I have been doing a good bit of printing and all steppers are working fine. Thank you all for your help.
     
    mark tomlinson likes this.
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