C10 BOB limit switch wiring


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Thread: C10 BOB limit switch wiring

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    Default C10 BOB limit switch wiring

    Hi. I'm fairly new to cnc world. I am building my own cnc router machine. I'm currently trying to wire up limit switches to the c10 BOB. I have NO/NC switches and I don't know if I require the use of a resistor or is there a resistor on the BOB. again, I'm a noob. Thanks

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    Default Re: C10 BOB limit switch wiring

    If your input voltage is 5 volt or 0 volt you can connect it

    without any resistor directly.

    what is your software ?

    you can contact me

    mattcnc@protonmail.com



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    Default Re: C10 BOB limit switch wiring

    The c10 BOB has 5v for the switches. I'll be running mach 3.

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    Default Re: C10 BOB limit switch wiring

    which version of the C10 breakout board do you have ?

    a while ago I reverse engineered the C10 BOB from various photos on the net to produce this diagram

    C10 BOB limit switch wiring-c10-o-jpg
    C10 BOB limit switch wiring-c10-rev10-jpg

    on the C10 a jumper connects the 5 input terminals via a 4K7 resistors to either +5V or ground
    (so they act as either pull up resistors to +5V or pull down resistors to ground /0V)

    with your limit switches connected between GND and the input terminals you need to put the jumper on +5V

    its usually safer to connect the switches as N/C so a broken limit switch wire stops the machine
    several switches can be wired in series so you only use one input terminal if you need to save the other four inputs for other uses ( E-stop , touch probe and MPG A&B outputs for example )



    If you have conflicting requirements for pull up or pull down resistors by having switches that ground four of the inputs and one that connects an input to +5V

    you can connect the C10 jumper to +5V so the on board 4K7 resistors act as pull up resistors on all inputs

    then for the input with the switch to +5V you can connect a resistor of about 200 to 500 ohms between the input and ground
    this low value of pull down resistor will over ride the effect of the on board 4K7 pull up resistor


    John

    note
    if you have the C10S it uses one 74ACT245 to buffer printer port pins 2 to 9 instead of the two 74ACT245 IC's on the earlier C10

    C10 BOB limit switch wiring-c10s-bi-directional-parallel-port-interface-card

    Last edited by john-100; 12-12-2017 at 07:16 AM. Reason: add ref to C10S


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    Default Re: C10 BOB limit switch wiring

    The c10 BOB I have is revision 10.3. I plan to use two limit switches per axis. I guess the two the two limit switches per axis will be in series. So its best to wire limit switch to NC and have jumper set to 5v to pull up? I appreciate all the help so far.

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    Default Re: C10 BOB limit switch wiring

    yes
    on each axis wire the two N/C limit switches in series and set the input resistors as pull up (to +5V)

    John



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    Default Re: C10 BOB limit switch wiring

    double post



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    Default Re: C10 BOB limit switch wiring

    Perfect! Thanks for the help. Another question I have is can the c10 BOB trigger the router to turn on when the job begins and off when it's done?

    Sent from my SM-N900W8 using Tapatalk



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    Default Re: C10 BOB limit switch wiring

    yes depending on what router spindle you have

    if its basically an AC motor with a collet chuck ( like a Dremel with the switch locked on)

    you can use one of the possible twelve C10 outputs to switch the spindle on &off

    either using some thing like cnc4ps's C37 - Single Relay Board / C15 - DUAL RELAY BOARD
    or a solid state relay

    if you want to control a VFD drive & 3 phase spindle motor you will need to add something like cnc4pc's
    C41 - PWM Variable Speed Control Board



    John



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C10 BOB limit switch wiring

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