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  1. #1
    Member
    Join Date
    Dec 2021
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    9

    7i76E; How to properly turn on?

    Hello. I am wondering:
    1)How to properly turn the 7i76E on, or switch it.
    2) Is there a proper sequence to start 7i76E, stepper drivers, linuxcnc... Just fire it all up at once?

    At the moment I am testing the 7i76E with a bench power supply. I have it wired so that 24V goes into the orange TB1, then it jumps over to TB3 nearby to provide for the 5v side of things. I understand (possibly incorrectly) that you're not supposed to switch the DC24v in.

    So, how are you supposed to turn it on?

    Flicking on the bench supply has not caused any problems. I have tested successfully this way. I will eventually have this coming from a 36v power supply, stepped down to 24v. The switch will be on the AC side of the power supply.

    I am new to electronics, but have gotten to the point of motion on my steppers. That has to count for something...

    Nick

  2. #2
    Member
    Join Date
    Dec 2021
    Posts
    9

    Re: 7i76E; How to properly turn on?

    I'm talking about the MESA 7i76E...shoulda put that in the original post... Anyone?

  3. #3
    Member
    Join Date
    Dec 2021
    Posts
    9

    Re: 7i76E; How to properly turn on?

    Can nobody offer any advice?

  4. #4
    Community Moderator
    Join Date
    Dec 2005
    Posts
    565

    Re: 7i76E; How to properly turn on?

    Have you tried contacting Mesa? Peter is usually really good at helping folks who've bought his products and usually gets back quite quickly.

    Mark

  5. #5
    Registered
    Join Date
    Feb 2008
    Posts
    630

    Re: 7i76E; How to properly turn on?

    As long as you switch the AC side you should be fine.

    In general its not a good idea to switch DC supplies
    to electronic equipment with mechanical switches
    due to the large surge currents created charging
    the bypass capacitors.

  6. #6
    Community Moderator
    Join Date
    Dec 2005
    Posts
    565

    Re: 7i76E; How to properly turn on?

    And there you have it right from the horse's mouth.

    Mark

  7. #7
    Registered
    Join Date
    May 2015
    Posts
    636

    Re: 7i76E; How to properly turn on?

    You need to power on the 7i76e before you start linuxcnc.
    If you power it off overnight and leave the pc on, just restart linuxcnc after power up of the mesa card. No need to reboot
    Rod Webster
    www.vehiclemods.net.au

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